LOM and PCIe Slots

LOM and PCIe Slots

The following table lists the LOM and PCIe BIOS settings that you can configure through a BIOS policy or the default BIOS settings:

Name

Description

Supported Attributes

Versions

Platforms

Values

Dependencies

ACS Control GPU n where n varies from 1-14

Access Control Services (ACS) allow the processor to enable or disable peer-to-peer communication between multiple devices for GPUs.

4.0(4) and later

C480 M5

Enabled, Disabled

  • Disabled Disables peer-to-peer communication between multiple devices for GPUs.

  • EnabledEnables peer-to-peer communication between multiple devices for GPUs.

CDN Support for LOM

Whether the Ethernet Networking Identifier naming convention is according to Consistent Device Naming (CDN) or the traditional way of naming conventions.

4.0(4) and later

C480 M5, B200 M6, X210 M6

Enabled, Disabled

  • Disabled OS Ethernet Networking Identifier is named in a default convention as ETH0, ETH1 and so on.

  • Enabled OS Ethernet Network Identifier is named in a consistent device naming (CDN) convention according to the physical LAN on Motherboard (LOM) port numbering; LOM Port 0, LOM Port 1 and so on.

Note

 

Not applicable for XE1X0M8.

External SSC Enable

This option allows you to Enable/Disable the Clock Spread Spectrum of the external clock generators.

4.1(2) and later

B200 M5, B480 M5, C220 M5, C240 M5, C480 M5, S3260 M5, B200 M6, C220 M6, C240 M6, X210c M6, C220 M7, C240 M7, X210c M7, X410c M7, C220 M8, C240 M8, X210c M8, X410c M8

Enabled, Disabled, 0P3_Percent, 0P5_Percent, Hardware, Off

Note

 

0P3_Percent, 0P5_Percent, Hardware, Off options are available for M7 servers only.
IIO eDPC Support

This option allows a downstream link to be disabled after an uncorrectable error, making recovery possible in a controlled and robust manner.

4.2(1) and later

C220 M6, C240 M6, C220 M7, C240 M7, X210c M7, X410c M7, C220 M8, C240 M8, X210c M8, C245 M8, C225 M8, X215c M8, XE1X0M8

Disabled, On fatal error, On fatal and non-fatal error
LOM Port n OptionROM, where n ranges from 0-3.

Whether Option ROM is available on the LOM port n

4.0(4) and later

C220 M5, C240 M5, C480 M5,C220 M6, C240 M6

Disabled, Enabled, Legacy only, UEFI only

  • Disabled—The expansion slot is not available.

  • Enabled—The expansion slot is available.

  • UEFI only—The expansion slot is available only for UEFI.

  • Legacy only—The expansion slot is available only for legacy.

PCIe ARI Support

Whether all ARI support ports are enabled or disabled.

4.2(1) and later

C125 M5, C225 M6, C245 M6, C225 M8, C245 M8, X215c M8

Disabled, Enabled, Auto

  • Disabled—This option is Disabled.

  • Enabled—This options is enabled.

  • Auto—PCIe ARI Support is in auto mode.

PCIe PLL SSC Percent

Whether all PCIe PLL SSC ports are enabled or disabled.

4.1(2) and later

C220 M7, C240 M7, X210c M7, X410c M7

0–255 (Unit is (n/10)%)

Note

 

This is not applicable to XE1X0M8.
MRAIDn Link Speed where n ranges from 1-2.

This option allows you to restrict the maximum speed of MRAID.

4.0(2) and later

C220 M5, C240 M5, C220 M6, C225 M6, C220 M7, C240 M8

Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5

  • Disabled—The maximum speed is not restricted.

  • Enabled—The maximum speed is restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed.

  • Gen 3—8GT/s is the maximum speed allowed.

  • Gen 4—16GT/s is the maximum speed allowed.

    Note

     

    Applicable for M7, M8 servers only.

  • Gen 5—32GT/s is the maximum speed allowed.

    Note

     

    Applicable for M7, M8 servers only.
MRAID n OptionROM where n ranges from 1-2.

Whether Option ROM is available on the MRAID port.

4.0(2) and later

C220 M5, C240 M5, C220 M6, C225 M6, C220 M7, C225 M8, C240 M8

Disabled, Enabled

  • Disabled—The expansion slot is not available.

  • Enabled—The expansion slot is available. .

PCIe Slot MSTOR Link Speed

This option allows you to restrict the maximum speed of an MSTOR adapter.

4.2(1) and later

C225 M6, C245 M6. C245 M8, C225 M8, XE1X0M8

Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5

  • Disabled—The maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed.

  • Gen 3—8GT/s is the maximum speed allowed.

  • Gen 4—16GT/s is the maximum speed allowed.

  • Gen 5—32GT/s is the maximum speed allowed.

    Note

     

    Applicable for M8 servers only.
PCIe Slot MSTOR RAID OptionROM

Whether the server can use the Option ROMs present in the PCIe MSTOR RAID.

4.2(1) and later

B200 M5, B480 M5, C220 M5, C240 M5, C480 M5,C125 M5, C220 M6, C240 M6, C225 M6, C245 M6, C220 M7, C240 M7, C225 M8, C245 M8, C220 M8, C240 M8, XE1X0M8

Disabled, Enabled

  • Disabled—Option ROM is not available.

  • Enabled—Option ROM is available.

NVME n Link Speed where n ranges from 0-6 and 13-24.

This option allows you to restrict the maximum speed of an NVME card installed in the PCIe slot.

4.0(2) and later

C240 M5, C225 M8, C245 M8

Note

 

NVME 24 Link Speed supports C220 M7 and C240 M7 servers, and X210c M7 server.

Disabled, Auto, GEN1, GEN2, GEN3, GEN4, GEN5

  • Disabled—Maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed

  • Gen 3—8GT/s is the maximum speed allowed

  • Gen 4—16GT/s is the maximum speed allowed

  • Gen 5—32GT/s is the maximum speed allowed

NVME n OptionROM where n ranges from 0-6.

This options allows you to control the Option ROM execution of the PCIe adapter connected to the SSD:NVMe slot n.

4.0(2) and later

C220 M5, C240 M5, C225 M6, C245 M6

Enabled, Disabled

  • Disabled—Option is not restricted.

  • Enabled—Option is restricted.

PCIe Slot n Link Speed where n ranges from 1 to 8 .

Note

 

For C245 M8 platform, n ranges from 1 to 8.

Link speed for PCIe Slot designated by slot n.

4.0(1) and later

C220 M5, C240 M5, C480 M5, C125 M5, C220 M6, C240 M6, C225 M6, C245 M6, C220 M7, C240 M7 (Slots 4–8), C225 M8, C245 M8, C220 M8(1-3), C240 M8(1-8), XE1X0M8 (n ranges 1 to 3)

Disabled, Auto, GEN1, GEN2, GEN3, GEN4, GEN5

GEN5 is supported only for speeds 1 to 6.

  • Disabled—Maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed

  • Gen 3—8GT/s is the maximum speed allowed

  • Gen 4—16GT/s is the maximum speed allowed

  • Gen 5—32 GT/s is the maximum speed allowed

PCIe Slot nOptionROM , where n ranges from 1 to 8

Whether Option ROM is available on the port.

4.0(2) and later

C220 M5, C240 M5, C480 M5, C125 M5, C220 M6, C240 M6, C220 M7, C240 M7 (Slots 4–8), C245 M8, C220 M8 (Slots 1 to 3), C240 M8 (Slots 1-8), XE1X0M8 (n ranges 1 to 3)

Disabled, Enabled, Legacy only, UEFI only

  • Disabled—The expansion slot is not available.

  • Enabled—The expansion slot is available.

PCIe Slot:LOM Link Speed

To configure link speed for PCIe Slot:LOM.

4.0 (1) and later

C220 M5, C240 M5, C220 M6, C240 M6, C225 M6, C245 M6

Disabled, Auto, GEN1, GEN2, GEN3

  • Disabled—Maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed

  • Gen 3—8GT/s is the maximum speed allowed

Front NVME n Link Speed where n ranges from 1 to 12.

For C245 M8 platform, n ranges from 1 to 4.

This option allows you to restrict the maximum speed of an NVME card installed in the front PCIe slot.

4.0(4) and later

C220 M5, C240 M5, C225 M6, C245 M6, C220 M7, C240 M7 (Slots 11–24), C225 M8, C245 M8, C220 M8 (slots 1-16), C240 M8 (slots 1-32), XE1X0M8. (n ranges from 1 to 4)

Disabled, Auto, GEN1, GEN2, GEN3, GEN4, GEN5

  • Disabled—Maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed

  • Gen 3—8GT/s is the maximum speed allowed

  • Gen 4—16GT/s is the maximum speed allowed

  • Gen 5—32GT/s is the maximum speed allowed

Note

 

For UCSC-C225-M8N SKU, the front NVMe drive slots (1-10) do not support Gen5 speeds. The Front NVMe Link Speed tokens for these slots cannot be set to Gen5. If you attempt to set these tokens to Gen5, the system will automatically revert to the default state Auto.

Front NVME n OptionROM where n ranges from 1 to 24.

For C245 M8 platform, n ranges from 1 to 4.

This options allows you to control the Option ROM execution of the PCIe adapter connected to the SSD:NVMe slot n.

4.2(1) and later

C225 M6, C245 M6, C220 M7, C240 M7(Slots 11–24), C245 M8, C220 M8 (slots 1-16), C240 M8 (slots 1 - 32), XE1X0M8. (n ranges from 1 to 4)

Enabled, Disabled

  • Disabled—Option is not restricted.

  • Enabled—Option is restricted.

PCIe LOM:1 and 2 Link

This option allows you to restrict the maximum speed of an adapter card installed in PCIe slot 1 and 2.

4.0 (1) and later

B200 M5, B480 M5, C220 M5, C240 M5, C480 M5, S3260 M5

Enabled, Disabled

  • Disabled—Option is not restricted.

  • Enabled—Option is restricted.

Slot Mezz State

This option allows you to configure the Mezz state for PCIe slot.

4.0 (1) and later

B200 M5, B480 M5, C220 M5, C240 M5, C480 M5, S3260 M5

Disabled, Enabled, Legacy only, UEFI only

  • Disabled—The expansion slot is not available.

  • Enabled—The expansion slot is available.

  • UEFI only—The expansion slot is available only for UEFI.

  • Legacy only—The expansion slot is available only for legacy.

PCIe Slot:MLOM Link Speed

This option allows you to restrict the maximum speed of an MLOM adapter.

4.0 (1) and later

C220 M5, C240 M5, C220 M6, C240 M6, C225 M6, C245 M6, C220 M7, C240 M7, C225 M8, C245 M8, C220 M8, C240 M8

Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5

  • Disabled—The maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed.

  • Gen 3—8GT/s is the maximum speed allowed.

  • Gen 4—16GT/s is the maximum speed allowed.

  • Gen 5—32GT/s is the maximum speed allowed.

PCIe Slot:MLOM OptionROM

Whether Option ROM is available on the MLOM port.

4.0 (1) and later

C220 M5, C240 M5, C220 M6, C240 M6, C225 M6, C245 M6, C220 M7, C240 M7, C225 M8, C245 M8, C220 M8, C240 M8

Disabled, Enabled, Legacy only, UEFI only

  • Disabled—The expansion slot is not available.

  • Enabled—The expansion slot is available.

  • UEFI only—The expansion slot is available only for UEFI.

  • Legacy only—The expansion slot is available only for legacy.

MRAID Link Speed

This option allows you to restrict the maximum speed of MRAID.

4.0(2) and later

C220 M5, C240 M5, C220 M6, C225 M6, C220 M7, C225 M8, C220 M8

Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5

  • Disabled—The maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed.

  • Gen 3—8GT/s is the maximum speed allowed.

  • Gen 4—16GT/s is the maximum speed allowed.

  • Gen 5—32GT/s is the maximum speed allowed.

PCIe Slot:MRAID OptionROM

Whether Option ROM is available on the MLOM port.

4.0(2) and later

C220 M5, C240 M5, C220 M6, C225 M6, C220 M7, C220 M8

Disabled, Enabled, Legacy only, UEFI only

  • Disabled—The expansion slot is not available.

  • Enabled—The expansion slot is available.

RAID Link Speed

This option allows you to restrict the maximum speed of RAID.

4.0 (1) and later

C480 M5

Disabled, Auto, GEN1, GEN2, GEN3

  • Disabled—Maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed

  • Gen 3—8GT/s is the maximum speed allowed

PCIe Slot RAID OptionROM

Whether Option ROM is available on the RAID slot or not.

4.0 (1) and later

C480 M5

Enabled, Disabled

  • Disabled—Option is not restricted.

  • Enabled—Option is restricted.

Rear NVME n Link Speed, where n ranges from 1 to 4.

This option allows you to restrict the maximum speed of rear NVME.

4.0(4) and later

C240 M5, C240 M6, C245 M6, C220 M7, C240 M7, C245 M8, C240 M8

Note

 

NVME 4 Link Speed supports C240 M7 servers, X210c M7, and C240 M8 server.

Auto, Disabled, Gen 1, Gen 2, Gen 3, Gen 4, Gen 5

  • Disabled—The maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2.5GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed.

  • Gen 3—8GT/s is the maximum speed allowed.

  • Gen 4—16GT/s is the maximum speed allowed.

  • Gen 5—32GT/s is the maximum speed allowed.

Rear NVME n OptionROM, where n ranges from 1 to 4.

Whether Option ROM is available on the rear NVME or not.

4.0(4) and later

C240 M5, C480 M5, C240 M6, C245 M6, C220 M7, C240 M7, C245 M8, C240 M8

Enabled, Disabled

  • Disabled—Option is not restricted.

  • Enabled—Option is restricted.

PCIe Slot:Riser Link Speedn, where n is 1 and 2.

This option allows you to restrict the maximum speed of Riser.

4.0(4) and later

C240 M5, C480 M5, C240 M6

Disabled, Auto, GEN1, GEN2, GEN3

  • Disabled—Maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed

  • Gen 3—8GT/s is the maximum speed allowed

PCIe Slot:Riser nSlotx Link Speed, where n is 1 and 2 and x is from 1 to 6.

This option allows you to restrict the maximum speed of Riser in the x slot .

4.0(2) and later

C220 M5, C240 M5, C480 M5, C125 M5

Disabled, Auto, GEN1, GEN2, GEN3

  • Disabled—Maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed

  • Gen 3—8GT/s is the maximum speed allowed

PCIe Slot:SAS OptionROM

Whether Option ROM is available on SAS slot or not.

4.0(2) and later

C220 M5, C240 M5, C480 M5, C125 M5

Disabled, Enabled, Legacy only, UEFI only

  • Disabled—The expansion slot is not available.

  • Enabled—The expansion slot is available.

  • UEFI only—The expansion slot is available only for UEFI.

  • Legacy only—The expansion slot is available only for legacy.

PCIe Slot:FrontSSD nLink Speed, where n is 1 and 2.

This option allows you to restrict the maximum speed of Front SSD.

4.0(2) and later

C220 M5, C240 M5, C480 M5, S3260 M5, C125 M5, C220 M6, C240 M6, C225 M6, C245 M6, C220 M7, C240 M7, C225 M8, C245 M8

Disabled, Auto, GEN1, GEN2, GEN3

  • Disabled—Maximum speed is not restricted.

  • Auto—The maximum speed is set automatically.

  • Gen 1—2GT/s (gigatransfers per second) is the maximum speed allowed.

  • Gen 2—5GT/s is the maximum speed allowed

  • Gen 3—8GT/s is the maximum speed allowed

Single Root I/O Virtualization (SR-IOV) Support

 Controls the Single Root I/O Virtualization. SR-IOV allows a device, such as a network adapter, to separate access to its resources among various PCIe hardware functions.

4.3(4b) and later

C125 M5, C225 M6, C245 M6, C225 M8, C245 M8, X215c M8

Enabled, Disabled

Re-Size BAR Support

Allows to enable or disable Re-sizable BAR support setup item.

4.3(4b) and later

C220 M7, C240 M7, X210 M7, X410 M7, C225 M8, C245 M8, X215c M8, C220 M8, C240 M8, X210c M8, X410c M8, XE1X0M8

Enabled, Disabled

Note

 

By default it is Enabled for AMD platforms and Disabled for Intel platforms.