Managing Storage Using RAID


Note

The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

This chapter includes the following sections:

RAID Options


Note

The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

You can choose to store the E-Series Server data files on local Redundant Array of Inexpensive Disks (RAID). The following RAID levels are supported:

  • The single-wide E-Series Server supports RAID 0 and RAID 1 levels.

  • The double-wide E-Series Server supports RAID 0, RAID 1, and RAID 5 levels.

  • The double-wide E-Series Server with the PCIe option supports RAID 0 and RAID 1 levels.

RAID 0

With RAID 0, the data is stored evenly in stripe blocks across one or more disk drives without redundancy (mirroring). The data in all of the disk drives is different.

Figure 1. RAID 0

Compared to RAID 1, RAID 0 provides additional storage because both disk drives are used to store data. The performance is improved because the read and write operation occurs in parallel within the two disk drives.

However, there is no fault tolerance, error checking, hot spare, or hot-swapping. If one disk drive fails, the data in the entire array is destroyed. Because there is no error checking or hot-swapping, the array is susceptible to unrecoverable errors.

RAID 1

RAID 1 creates a mirrored set of disk drives, where the data in both the disk drives is identical, providing redundancy and high availability. If one disk drive fails, the other disk drive takes over, preserving the data.

RAID 1 also allows you to use a hot spare disk drive. The hot spare drive is always active and is held in readiness as a hot standby drive during a failover.

Figure 2. RAID 1

RAID 1 supports fault tolerance and hot-swapping. When one disk drive fails, you can remove the faulty disk drive and replace it with a new disk drive.

However, compared to RAID 0, there is less storage space because only half of the total potential disk space is available for storage and there is an impact on performance.

RAID 5

With RAID 5, the data is stored in stripe blocks with parity data staggered across all disk drives, providing redundancy at a low cost.

Figure 3. RAID 5

RAID 5 provides more data storage capacity than RAID 1 and better data protection than RAID 0. It also supports hot swapping; however, RAID 1 offers better performance.

Non-RAID

When the disk drives of a computer are not configured as RAID, the computer is in non-RAID mode. Non-RAID mode is also referred to as Just a Bunch of Disks or Just a Bunch of Drives (JBOD). Non-RAID mode does not support fault tolerance, error checking, hot-swapping, hot spare, or redundancy.

Summary of RAID Options

RAID Option Description Advantages Disadvantages

RAID 0

Data stored evenly in stripe blocks without redundancy

  • Better storage

  • Improved performance

  • No error checking

  • No fault tolerance

  • No hot-swapping

  • No redundancy

  • No hot spare

RAID 1

Mirrored set of disk drives and an optional hot spare disk drive

  • High availability

  • Fault tolerance

  • Hot spare

  • Hot-swapping

  • Less storage

  • Performance impact

RAID 5

Data stored in stripe blocks with parity data staggered across all disk drives

  • Better storage efficiency than RAID 1

  • Better fault tolerance than RAID 0

  • Low cost of redundancy

  • Hot-swapping

  • Slow performance

Non-RAID

Disk drives not configured for RAID

Also referred to as JBOD

  • Portable

  • No error checking

  • No fault tolerance

  • No hot-swapping

  • No redundancy

  • No hot spare

Configuring RAID


Note

The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

Use this procedure to configure the RAID level, strip size, host access privileges, drive caching, and initialization parameters on a virtual drive.

Procedure
     Command or ActionPurpose
    Step 1Server# scope chassis  

    Enters the chassis command mode.

     
    Step 2Server /chassis # show storageadapter  

    Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

     
    Step 3Server /chassis # scope storageadapter SLOT-5  

    Enters command mode for an installed storage card.

     
    Step 4Server /chassis/storageadapter # show physical-drive  

    Displays physical disk drives. This information allows you to determine the status of the physical drives.

    Note   

    To configure RAID, the status of the physical drives must be unconfigured good. To change the state of the physical drive, see Changing the Physical Drive State.

     
    Step 5Server /chassis/storageadapter # create-virtualdrive {-r0 | -r1 | -r5} physical-drive-numbers [QuickInit | FullInit | NoInit] [RW | RO | Blocked] [DiskCacheUnchanged | DiskCacheEnable | DiskCacheDisable] [-strpsz64 | -strpsz32 | -strpsz16 | -strpsz8]  

    Creates a virtual drive with the specified RAID level on the physical drive. You can also specify the following options:

    Note   

    The options are not case sensitive.

    • (Optional) Initialization options:

      • QuickInit—Controller initialization the drive quickly. You can start writing data into the virtual drive in a few seconds. This is the default option.

      • FullInit—Controller does a complete initialization of the new configuration. You cannot write data into the virtual drive until initialization is complete. If the drive is large, this can take a long time.

      • NoInit—Controller does not initialize the drives.

    • (Optional) Access policy options:

      • RW—The host has full access to the drive. This is the default option.

      • RO—The host can only read data from the drive.

      • Blocked—The host cannot access the drive.

    • (Optional) Drive cache options:

      • DriveCacheDisable—Caching is disabled on the physical drives.

        Note    This is the default and recommended option.

      • DriveCacheUnchanged—The controller uses the caching policy specified on the physical drive. This is the default option.

      • DriveCacheEnable—Caching is enabled on the physical drives.

    • (Optional) Strip size options:

      • -strpsz64—This is the default option.

      • -strpsz32

      • -strpsz16

      • -strpsz8

      Caution   

      The smaller strip sizes have a known problem with VMware vSphere Hypervisor™ installation; therefore, if you are installing the vSphere platform, we recommend that you use the strpsz64 option.

     
    Step 6Server /chassis/storageadapter # show virtual-drive  

    (Optional) Displays virtual drive information for the storage card. This information allows you to verify RAID configuration.

     

    This example shows how to configure RAID. 

    Server# scope chassis
Server /chassis # show storageadapter

PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis # scope storageadapter SLOT-5

Server /chassis /storageadapter# show physical-drive

Slot Number  Controller Status               Manufacturer   Model        Drive  Firmware Coerced Size   Type  
----------- ---------- ------------------------------------ -------------- -------------- -------------- --- 
1            SLOT-5     unconfigured good    TOSHIBA        MBF2600RC    5704   571250 MB          HDD   
2            SLOT-5     unconfigured good    ATA            ST9500620NS  SN01   475883 MB          HDD 

Server /chassis /storageadapter # create-virtualdrive -r0 1 FullInit RW DiskCacheEnable -strpsz32
---
status: ok
----------------------
Server /chassis /storageadapter # show virtual-drive
Virtual Drive  Status               Name                     Size       RAID Level 
-------------- -------------------- ------------------------ ---------- ---------- 
0              Optimal                                       571250 MB  RAID 0
    What to Do Next

    Make the disk drive bootable. See Making the Disk Drive Bootable.

    Deleting the RAID Configuration


    Note

    The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

    Use this procedure to clear all RAID configuration.

    Procedure
       Command or ActionPurpose
      Step 1Server# scope chassis  

      Enters the chassis command mode.

       
      Step 2Server /chassis # show storageadapter  

      Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

       
      Step 3Server /chassis # scope storageadapter SLOT-5  

      Enters command mode for an installed storage card.

       
      Step 4Server /chassis /storageadapter # clear-all-raid-config  

      Clears all RAID configuration. At the confirmation prompts answer Yes.

      Note   

      When RAID configuration is cleared, all existing data on th disk drive is lost.

       

      This example shows how to delete RAID configuration. 

      Server# scope chassis
Server /chassis # show storageadapter 

PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis # scope storageadapter SLOT-5
Server /chassis /storageadapter # clear-all-raid-config
This operation will clear all RAID configuration.
Warning: All data in the disks would be lost!!!
Are you sure you want to proceed? [Yes|No] Yes
Are you really sure you want to clear all RAID configuration and lose all data? [Yes|No] Yes

      Changing the Physical Drive State


      Note

      The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

      Use this procedure to change the state of the physical drive. Options are: hotspare, jbod, or unconfigured good.

      Procedure
         Command or ActionPurpose
        Step 1Server# scope chassis  

        Enters the chassis command mode.

         
        Step 2Server /chassis # show storageadapter  

        Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

         
        Step 3Server /chassis # scope storageadapter SLOT-5  

        Enters command mode for an installed storage card.

         
        Step 4Server /chassis/storageadapter # show physical-drive  

        Displays physical disk drives.

         
        Step 5Server /chassis/storageadapter # scope physical-drive slot-number  

        Enters command mode for the specified physical drive.

         
        Step 6Server /chassis/storageadapter /physical-drive # show detail  

        Displays information about the specified physical drive.

         
        Step 7Server /chassis/storageadapter /physical-drive # set state {unconfiguredgood | jbod | hotspare}  

        Changes the state of the physical drive. Options are: hotspare, jbod, or unconfigured good.

         
        Step 8Server /chassis/storageadapter /physical-drive* # commit  

        Commits the changes.

         
        Step 9Server /chassis/storageadapter /physical-drive # show detail  

        Displays information about the specified physical drive.

         

        This example shows how to change the state of the physical drive. 

        Server# scope chassis
Server /chassis # show storageadapter

PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis# scope storageadapter SLOT-5
Server /chassis /storageadapter# show physical-drive

Slot Number  Controller Status               Manufacturer   Model        Drive  Firmware Coerced Size   Type  
----------- ---------- ------------------------------------ -------------- -------------- -------------- ----- 
1            SLOT-5     system               TOSHIBA        MBF2600RC    5704   571250 MB          HDD   
2            SLOT-5     unconfigured good    ATA            ST9500620NS  SN01   475883 MB          HDD   

Server /chassis /storageadapter# scope physical-drive 1
Server /chassis /storageadapter/physical-drive# show detail

Slot Number 1:
    Controller: SLOT-5
    Status: system
    Manufacturer: TOSHIBA
    Model: MBF2600RC
    Drive Firmware: 5704
    Coerced Size: 571250 MB
    Type: HDD

Server /chassis /storageadapter/physical-drive# set state hotspare
Server /chassis /storageadapter/physical-drive*# commit 
Server /chassis /storageadapter/physical-drive# show detail

Slot Number 1:
    Controller: SLOT-5
    Status: hotspare
    Manufacturer: TOSHIBA
    Model: MBF2600RC
    Drive Firmware: 5704
    Coerced Size: 571250 MB
    Type: HDD

        Rebuilding the Physical Drive


        Note

        The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

        Use this procedure to manually start the rebuild process on the physical drive.

        Procedure
           Command or ActionPurpose
          Step 1Server# scope chassis  

          Enters the chassis command mode.

           
          Step 2Server /chassis # show storageadapter  

          Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

           
          Step 3Server /chassis # scope storageadapter SLOT-5  

          Enters command mode for an installed storage card.

           
          Step 4Server /chassis/storageadapter # show physical-drive  

          Displays physical disk drives.

           
          Step 5Server /chassis/storageadapter # scope physical-drive slot-number  

          Enters command mode for the specified physical drive.

           
          Step 6Server /chassis/storageadapter /physical-drive # rebuild  

          Rebuilds the physical drive.

           
          Step 7Server /chassis/storageadapter /physical-drive # rebuild abort  

          (Optional) Stops the rebuild process.

           

          This example shows how to change the state of the physical drive. 

          Server# scope chassis
Server /chassis # show storageadapter

PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis# scope storageadapter SLOT-5
Server /chassis /storageadapter# show physical-drive

Slot Number  Controller Status               Manufacturer   Model        Drive  Firmware Coerced Size   Type  
----------- ---------- ------------------------------------ -------------- -------------- -------------- ----- 
1            SLOT-5     system               TOSHIBA        MBF2600RC    5704   571250 MB          HDD   
2            SLOT-5     unconfigured good    ATA            ST9500620NS  SN01   475883 MB          HDD   

Server /chassis /storageadapter# scope physical-drive 1
Server /chassis /storageadapter/physical-drive# rebuild 
Server /chassis /storageadapter/physical-drive# rebuild abort

          Erasing the Contents of a Physical Drive


          Note

          The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

          Use this procedure to erase all of the contents of a physical drive and set it to zero.

          Procedure
             Command or ActionPurpose
            Step 1Server# scope chassis  

            Enters the chassis command mode.

             
            Step 2Server /chassis # show storageadapter  

            Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

             
            Step 3Server /chassis # scope storageadapter SLOT-5  

            Enters command mode for an installed storage card.

             
            Step 4Server /chassis/storageadapter # show physical-drive  

            Displays physical disk drives.

             
            Step 5Server /chassis/storageadapter # scope physical-drive slot-number  

            Enters command mode for the specified physical drive.

             
            Step 6Server /chassis/storageadapter /physical-drive # erase  

            Erases all of the contents of a physical drive and sets it to zero.

            Note   

            The erase process takes a few hours to complete.

             
            Step 7Server /chassis/storageadapter /physical-drive # erase abort  

            (Optional) Stops the erase process.

             

            This example shows how to erase the contents of a physical drive. 

            Server# scope chassis
Server /chassis # show storageadapter

PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis# scope storageadapter SLOT-5
Server /chassis /storageadapter# show physical-drive

Slot Number  Controller Status               Manufacturer   Model        Drive  Firmware Coerced Size   Type  
----------- ---------- ------------------------------------ -------------- -------------- -------------- ----- 
1            SLOT-5     system               TOSHIBA        MBF2600RC    5704   571250 MB          HDD   
2            SLOT-5     unconfigured good    ATA            ST9500620NS  SN01   475883 MB          HDD   

Server /chassis /storageadapter# scope physical-drive 1
Server /chassis /storageadapter/physical-drive# erase
Server /chassis /storageadapter/physical-drive# erase abort

            Enabling Auto Rebuild on the Storage Controller


            Note

            The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

            Use this procedure to rebuild a disk drive automatically. If one of the disk drives that is configured with RAID gets degraded, and a new drive is plugged it, the rebuild process on the new drive starts automatically.

            Procedure
               Command or ActionPurpose
              Step 1Server# scope chassis  

              Enters the chassis command mode.

               
              Step 2Server /chassis # show storageadapter  

              Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

               
              Step 3Server /chassis # scope storageadapter SLOT-5  

              Enters command mode for an installed storage card.

               
              Step 4Server /chassis/storageadapter # set global-hotspare-for-newdrives true  

              Enables auto rebuild on the storage controller.

               
              Step 5Server /chassis/storageadapter* # commit  

              Commits the changes.

               

              This example shows how to enable auto rebuild on the storage controller. 

              Server# scope chassis
Server /chassis # show storageadapter
PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis# scope storageadapter SLOT-5
Server /chassis /storageadapter# set global-hotspare-for-newdrives true
Server /chassis /storageadapter*# commit

              Deleting a Virtual Drive


              Note

              The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

              Procedure
                 Command or ActionPurpose
                Step 1Server# scope chassis  

                Enters the chassis command mode.

                 
                Step 2Server /chassis # show storageadapter  

                Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

                 
                Step 3Server /chassis # scope storageadapter SLOT-5  

                Enters command mode for an installed storage card.

                 
                Step 4Server /chassis/storageadapter # show virtual-drive  

                Displays virtual drive information that includes the virtual drive number, which you is required to delete the virtual drive.

                 
                Step 5Server /chassis/storageadapter # delete virtual-drive drive-number  

                Deletes the specified virtual drive.

                 
                Step 6Server /chassis/storageadapter* # commit  

                Commits the changes.

                 

                This example shows how to delete a virtual drive. 

                Server# scope chassis
Server /chassis # show storageadapter
PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis# scope storageadapter SLOT-5
Server /chassis /storageadapter # show virtual-drive
Virtual Drive  Status               Name                     Size       RAID Level 
-------------- -------------------- ------------------------ ---------- ---------- 
0              Optimal                                       571250 MB  RAID 0  
   
Server /chassis /storageadapter # delete virtual-drive 0
Server /chassis /storageadapter *# commit

                Performing a Consistency Check on a Virtual Drive


                Note

                The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

                Use this procedure to verify the drives for consistency.

                • For RAID 5—This procedure checks if the data in all of the parity stripe blocks is correct.

                • For RAID 1—This procedure checks if the data in both disk drives is identical.

                Procedure
                   Command or ActionPurpose
                  Step 1Server# scope chassis  

                  Enters the chassis command mode.

                   
                  Step 2Server /chassis # show storageadapter  

                  Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

                   
                  Step 3Server /chassis # scope storageadapter SLOT-5  

                  Enters command mode for an installed storage card.

                   
                  Step 4Server /chassis/storageadapter # scope virtual-drive drive-number  

                  Enters command mode for the specified virtual drive.

                   
                  Step 5Server /chassis/storageadapter /virtual-drive # verify  

                  Verifies the drive for consistency.

                  • For RAID 5—Checks if the data in all of the parity stripe blocks is correct.

                  • For RAID 1—Checks if the data in both disk drives is identical.

                   
                  Step 6Server /chassis/storageadapter /virtual-drive # verify abort  

                  (Optional) Stops the verify process.

                   
                  Step 7Server /chassis/storageadapter /virtual-drive # show detail  

                  Displays information about the specified virtual drive.

                   

                  This example shows how to perform a consistency check on a virtual drive. 

                  Server# scope chassis
Server /chassis # show storageadapter

PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis# scope storageadapter SLOT-5
Server /chassis /storageadapter# scope virtual-drive 0
Server /chassis /storageadapter/virtual-drive# verify
---
status: ok
...
Server /chassis /storageadapter/virtual-drive# show detail
Status: Optimal
    Name:
    Size: 475883 MB
    RAID Level: RAID 1
    Target ID: 0
    Stripe Size: 64 KB
    Drives Per Span: 2
    Span Depth: 1
    Access Policy: Read-Write
    Disk Cache Policy: Unchanged
    Write Cache Policy: Write Through
    Cache Policy: Direct
    Read Ahead Policy: None
    Auto Snapshot: false
    Auto Delete Oldest: true
    Allow Background Init: true
    Consistency Check Progress: 0 %
    Consistency Check Elapsed Seconds: 0 s

                  Reconstructing the Virtual Drive Options


                  Note

                  The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

                  To migrate (reconstruct) the virtual drive to a new RAID level, you might need to add or remove physical drives. When you add or remove physical drives, the size of the virtual drive is either retained or increased.

                  You can retain or increase the size of the virtual drive, but you cannot decrease its size. For example, if you have two physical drives with RAID 0, you cannot migrate to RAID 1 with the same number of drives. Because with RAID 1, a mirrored set of disk drives are created, which reduces the size of the virtual drive to half of what it was before, which is not supported.


                  Note

                  The virtual drive reconstruction process might take several hours to complete. You can continue to use the system during the reconstruction process.

                  Options for Retaining the Size of the Virtual Drive

                  See the following figure and the table that follows for options that retain the size of the virtual drive when you migrate the virtual drive to a new RAID level.
                  Figure 4. Retaining the Virtual Drive Size Options



                  The following table lists the options that retain the size of the virtual drive and provides information about how many physical drives you must add or remove to migrate the virtual drive to a specific RAID level.

                  Table 1  Retaining the Virtual Drive Size

                  From:

                  Migrate to:

                  		Add or Remove Disks

                  One physical drive with RAID 0

                  Two physical drives with RAID 1

                  Add one disk.

                  Two physical drives with RAID 1

                  One physical drive with RAID 0

                  Remove one disk.

                  Two physical drives with RAID 0

                  Three physical drives with RAID 5

                  Add one disk.

                  Three physical drives with RAID 5

                  Two physical drives with RAID 0

                  Remove one disk.

                  Options for Increasing the Size of the Virtual Drive

                  See the following figure and the table that follows for options that increase the size of the virtual drive when you migrate the virtual drive to a new RAID level.
                  Figure 5. Increasing the Virtual Drive Size Options



                  The following table lists the options that increase the size of the virtual drive and provides information about how many physical drives you must add or remove to migrate the virtual drive to a specific RAID level.

                  Table 2  Increasing the Virtual Drive Size

                  From:

                  Migrate to:

                  		Add or Remove Disks

                  One physical drive with RAID 0

                  See the red arrows in the figure.

                  Two physical drives with RAID 0

                  Add one disk.

                  Three physical drives with RAID 5

                  Add two disks.

                  Three physical drives with RAID 0

                  Add two disks.

                  Two physical drives with RAID 1

                  See the green arrows in the figure.

                  Two physical drives with RAID 0

                  —

                  Three physical drives with RAID 5

                  Add one disk.

                  Three physical drives with RAID 0

                  Add one disk.

                  Two physical drives with RAID 0

                  See the black arrow in the figure.

                  Three physical drives with RAID 0

                  Add one disk.

                  Three physical drives with RAID 5

                  See the purple arrow in the figure.

                  Three physical drives with RAID 0

                  —

                  Reconstructing a Virtual Drive


                  Note

                  The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

                  Use this procedure to add or remove the physical drive in order to migrate the virtual drive to the specified RAID level.

                  Before You Begin

                  See Reconstructing the Virtual Drive Options.

                  Procedure
                     Command or ActionPurpose
                    Step 1Server# scope chassis  

                    Enters the chassis command mode.

                     
                    Step 2Server /chassis # show storageadapter  

                    Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

                     
                    Step 3Server /chassis # scope storageadapter SLOT-5  

                    Enters command mode for an installed storage card.

                     
                    Step 4Server /chassis/storageadapter # scope virtual-drive drive-number  

                    Enters command mode for the specified virtual drive.

                     
                    Step 5Server /chassis/storageadapter /virtual-drive # reconstruct {-r0 | -r1 | -r5} [-add | -rmv] new-physical-drive-slot-number(s)  
                    Adds or removes the physical drive to migrate the virtual drive to the new specified RAID level.

                    • -r0 | -r1 | -r5—Available RAID levels are: RAID 0, RAID 1, or RAID 5.

                    • -add | -rmv —Adds or removes the physical drive.
                     
                    Step 6Server /chassis/storageadapter /virtual-drive # show detail  

                    Displays information about the specified virtual drive.

                     

                    This example shows how to migrate one of two discs that was initially configured as RAID 1 to RAID 0. 

                    Server# scope chassis
Server /chassis # show storageadapter

PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis# scope storageadapter SLOT-5
Server /chassis /storageadapter# scope virtual-drive 0
Server /chassis /storageadapter/virtual-drive# reconstruct -r0 -rmv 1
---
status: ok
...
Server /chassis /storageadapter/virtual-drive# show detail
Status: Optimal
    Status: Optimal
    Name: 
    Size: 475883 MB
    RAID Level: RAID 1
    Target ID: 0
    Stripe Size: 64 KB
    Drives Per Span: 2
    Span Depth: 1
    Access Policy: Read-Write
    Disk Cache Policy: Unchanged
    Write Cache Policy: Write Through
    Cache Policy: Direct
    Read Ahead Policy: None
    Auto Snapshot: false
    Auto Delete Oldest: true
    Allow Background Init: true
    ReConstruct Progress: 0 %
    ReConstruct Elapsed Seconds: 3 s

                    Making the Disk Drive Bootable


                    Note

                    The RAID feature is applicable to E-Series Servers and the SM E-Series NCE. The RAID feature is not applicable to the EHWIC E-Series NCE and the NIM E-Series NCE.

                    After you configure RAID, you must make the disk drive bootable. Use this procedure to make the disk drive bootable.

                    Before You Begin

                    Configure RAID on the disk drive.

                    Procedure
                       Command or ActionPurpose
                      Step 1Server# scope chassis  

                      Enters the chassis command mode.

                       
                      Step 2Server /chassis # show storageadapter  

                      Displays information about installed storage cards. This information allows you to determine the slot in which the storage card is installed.

                       
                      Step 3Server /chassis # scope storageadapter SLOT-5  

                      Enters command mode for an installed storage card.

                       
                      Step 4Server /chassis/storageadapter # show physical-drive  

                      Displays physical disk drives.

                      Note   
                      The physical drive status could be one of the following:

                      • system—JBOD mode. The drive is not configured as RAID.

                      • online—RAID mode.

                      • unconfigured good—The drive is ready to be assigned to a drive group or hot spare pool. No mode is configured on the drive.

                      • hotspare—The drive is designated as a spare drive. No mode is configured on the drive.

                       
                      Step 5Server /chassis/storageadapter # set boot-drive {pd1 | pd2 | pd3 | vd0}  

                      Makes the disk drive bootable.

                      Note   

                      To make the disk drive bootable, the status of the drive must be system. The status system indicates that the drive is in JBOD (non-RAID) mode.

                       
                      Step 6Server /chassis/storageadapter # commit  

                      Commits the changes.

                       
                      Step 7Server /chassis/storageadapter # show settings  

                      Displays settings.

                       

                      This example shows how to make the disk drive bootable using the CIMC CLI. 

                      Server# scope chassis
Server /chassis# show storageadapter

PCI Slot Product      Name    Serial Number  Firmware Package Build   Product ID Cache Memory Size 
-------- ------------------------------ -------------- ------------------------ -------------- ---
SLOT-5   LSI MegaRAID SAS     2004 ROMB      20.10.1-0092             LSI Logic   0 MB  

Server /chassis# scope storageadapter SLOT-5
Server /chassis /storageadapter# show physical-drive

Slot Number  Controller Status               Manufacturer   Model        Drive  Firmware Coerced Size   Type  
----------- ---------- ------------------------------------ -------------- -------------- -------------- ----- 
1            SLOT-5     system               TOSHIBA        MBF2600RC    5704   571250 MB          HDD   
2            SLOT-5     unconfigured good    ATA            ST9500620NS  SN01   475883 MB          HDD  
 
   Server /chassis /storageadapter# set boot-drive pd1
Server /chassis /storageadapter*# commit
Server /chassis /storageadapter# show settings
Boot Drive: pd1