Table Of Contents
Discovering SCSI Targets
About SCSI LUN Discovery
Starting SCSI LUN Discovery
Initiating Customized Discovery
Displaying SCSI LUN Information
Discovering SCSI Targets
This chapter describes the SCSI LUN discovery feature provided in switches in the Cisco MDS 9000 Family. It includes the following sections:
•About SCSI LUN Discovery
•Starting SCSI LUN Discovery
•Initiating Customized Discovery
•Displaying SCSI LUN Information
About SCSI LUN Discovery
Small Computer System Interface (SCSI) targets include disks, tapes, and other storage devices. These targets do not register logical unit numbers (LUNs) with the name server.
The name server requires LUN information for the following reasons:
•To display LUN storage device information so an NMS can access this information.
•To report device capacity, serial number, and device ID information.
•To register the initiator and target features with the name server.
The SCSI LUN discovery feature uses the local domain controller Fibre Channel address. It uses the local domain controller as the source FC ID, and performs SCSI INQUIRY, REPORT LUNS, and READ CAPACITY commands on SCSI devices.
The SCSI LUN discovery feature is initiated on demand, through CLI or SNMP. This information is also synchronized with neighboring switches, if those switches belong to the Cisco MDS 9000 Family.
Starting SCSI LUN Discovery
SCSI LUN discovery is done on demand.
Only Nx ports present in the name server database and that are registered as FC4 Type = SCSI_FCP are discovered.
To begin SCSI LUN discovery, follow this step:
|
Command
|
Purpose
|
Step 1
|
switch# discover scsi-target local os all
|
Discovers local SCSI targets for all operating systems (OS). The operating system options are aix, all, hpux, linux, solaris, or windows
|
switch# discover scsi-target remote os aix
|
Discovers remote SCSI targets assigned to the AIX OS.
|
switch# discover scsi-target vsan 1 fcid 0x9c03d6
discover scsi-target vsan 1 fcid 0x9c03d6
VSAN: 1 FCID: 0x9c03d6 PWWN:
00:00:00:00:00:00:00:00
PRLI RSP: 0x01 SPARM: 0x0012
Vendor: Company 4 Model: ST318203FC Rev: 0004
Other: 00:00:02:32:8b:00:50:0a
|
Discovers SCSI targets for the specified VSAN (1) and FC ID (0x9c03d6).
|
switch# discover scsi-target custom-list os linux
|
Discovers SCSI targets from the customized list assigned to the Linux OS.
|
Initiating Customized Discovery
Customized discovery consists of a list of VSAN and domain pairs that are selectively configured to initiate a discovery. Use the custom-list option to initiate this discovery. The domain ID is a number from 0 to 255 in decimal or a number from 0x0 to 0xFF in hex.
To initiate a customized discovery, follow this step:
|
Command
|
Purpose
|
Step 1
|
switch# discover custom-list add vsan 1 domain 0X123456
|
Adds the specified entry to the custom list.
|
switch# discover custom-list delete vsan 1 domain 0X123456
|
Deletes the specified domain ID from the custom list.
|
Displaying SCSI LUN Information
Use the show scsi-target and show fcns database commands to display the results of the discovery. See Examples 27-1 to 27-8.
Example 27-1 Displays the Discovered Targets
switch# show scsi-target status
Note The discovery can take several minutes to complete, especially if the fabric is large or if several devices are slow to respond.
Example 27-2 Displays the FCNS Database
switch# show fcns database
172.22.91.115# show fcns database
--------------------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
--------------------------------------------------------------------------
0xeb0000 N 21:01:00:e0:8b:2a:f6:54 (Qlogic) scsi-fcp:init
0xeb0201 NL 10:00:00:00:c9:32:8d:76 (Emulex) scsi-fcp:init
Total number of entries = 2
--------------------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
--------------------------------------------------------------------------
0xed0001 NL 21:00:00:04:cf:fb:42:f8 (Seagate) scsi-fcp:target
Total number of entries = 1
--------------------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
--------------------------------------------------------------------------
0xcafe00 N 20:03:00:05:30:00:2a:20 (Cisco) FICON:CUP
Total number of entries = 1
Example 27-3 Displays the Discovered Target Disks
switch# show scsi-target disk
--------------------------------------------------------------------------------
VSAN FCID PWWN VENDOR MODEL REV
--------------------------------------------------------------------------------
1 0x9c03d6 21:00:00:20:37:46:78:97 Company 4 ST318203FC 0004
1 0x9c03d9 21:00:00:20:37:5b:cf:b9 Company 4 ST318203FC 0004
1 0x9c03da 21:00:00:20:37:18:6f:90 Company 4 ST318203FC 0004
1 0x9c03dc 21:00:00:20:37:5a:5b:27 Company 4 ST318203FC 0004
1 0x9c03e0 21:00:00:20:37:36:0b:4d Company 4 ST318203FC 0004
1 0x9c03e1 21:00:00:20:37:39:90:6a Company 4 ST318203 CLAR18 3844
1 0x9c03e2 21:00:00:20:37:18:d2:45 Company 4 ST318203 CLAR18 3844
1 0x9c03e4 21:00:00:20:37:6b:d7:18 Company 4 ST318203 CLAR18 3844
1 0x9c03e8 21:00:00:20:37:38:a7:c1 Company 4 ST318203FC 0004
1 0x9c03ef 21:00:00:20:37:18:17:d2 Company 4 ST318203FC 0004
Example 27-4 Displays the Discovered LUNs for All OSs
switch# show scsi-target lun os all
ST336607FC from SEAGATE (Rev 0006)
FCID is 0xed0001 in VSAN 7, PWWN is 21:00:00:04:cf:fb:42:f8
--------------------------------------------------------------------------------
OS LUN Capacity Status Serial Number Device-Id
--------------------------------------------------------------------------------
WIN 0x0 36704 Online 3JA1B9QA00007338 C:1 A:0 T:3 20:00:00:04:cf:fb:42:f8
AIX 0x0 36704 Online 3JA1B9QA00007338 C:1 A:0 T:3 20:00:00:04:cf:fb:42:f8
SOL 0x0 36704 Online 3JA1B9QA00007338 C:1 A:0 T:3 20:00:00:04:cf:fb:42:f8
LIN 0x0 36704 Online 3JA1B9QA00007338 C:1 A:0 T:3 20:00:00:04:cf:fb:42:f8
HP 0x0 36704 Online 3JA1B9QA00007338 C:1 A:0 T:3 20:00:00:04:cf:fb:42:f8
Example 27-5 Displays the Discovered LUNs for the Solaris OS
switch# show scsi-target lun os solaris
ST336607FC from SEAGATE (Rev 0006)
FCID is 0xed0001 in VSAN 7, PWWN is 21:00:00:04:cf:fb:42:f8
--------------------------------------------------------------------------------
OS LUN Capacity Status Serial Number Device-Id
--------------------------------------------------------------------------------
SOL 0x0 36704 Online 3JA1B9QA00007338 C:1 A:0 T:3 20:00:00:04:cf:fb:42:f8
The following command displays the port WWN that is assigned to each OS (Windows, AIX, Solaris, Linux, or HPUX)
Example 27-6 Displays the pWWNs for each OS
switch# show scsi-target pwwn
------------------------------
------------------------------
WIN 24:91:00:05:30:00:2a:1e
AIX 24:92:00:05:30:00:2a:1e
SOL 24:93:00:05:30:00:2a:1e
LIN 24:94:00:05:30:00:2a:1e
HP 24:95:00:05:30:00:2a:1e
Example 27-7 Displays Customized Discovered Targets
switch# show scsi-target custom-list
Use the show scsi-target auto-poll command to verify automatic discovery of SCSI targets that come online. The internal uuid number indicates that a CSM or an IPS module is in the chassis.
Example 27-8 Displays Customized Discovered Targets
switch# show scsi-target auto-poll
auto-polling is enabled, poll_start:0 poll_count:1 poll_type:0