Cisco Ucs Sas 9300-8E Hba Considerations; Mixing Rules; Bad Drive And Predictive Failure Behavior; Setting The Preferred Boot Device - Cisco UCS C220 M4 Installation And Service Manual
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Cisco UCS SAS 9300-8e HBA Considerations
Cisco UCS SAS 9300-8e HBA Considerations
This section contains the following topics:
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Mixing Rules
Do not mix the Cisco UCS 9300-8e HBA in the same server as the Cisco UCS 12G SAS Modular HBA.
Bad Drive and Predictive Failure Behavior
The bad drive and predictive failure behavior for the Cisco UCS SAS 9300-e HBA cards is different than
that for LSI MegaRAID cards. The list below compares behavior for these HBA cards and LSI
MegaRAID cards.
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Setting the Preferred Boot Device
Currently, the boot device order for these HBAs does not map to a physical slot as seen in the Boot
Option dialog of the server BIOS Setup Utility. This makes it difficult to differentiate between multiple
devices.
Use the following procedure to select the preferred boot device in the LSI BIOS CU SAS Topology
screen. When you select the preferred boot device in the BIOS CU SAS Topology screen, it is displayed
at the top of the list in the server BIOS Setup Utility Boot Option dialog, making it easy to identify.
Step 1
In the LSI SAS BIOS CU, navigate to the SAS Topology screen.
Step 2
Press Alt+B to select or deselect a device as the preferred boot device. On this screen, you can identify
the device by slot number.
Press Alt+A to select or deselect a device as the alternate boot device. On this screen, you can identify
Step 3
the device by slot number. The alternate boot device is used if the preferred boot device is not detected.
Return to the BIOS CU SAS Topology screen.
Step 4
Cisco UCS C220 M4 Server Installation and Service Guide
C-4
Mixing Rules, page C-4
Bad Drive and Predictive Failure Behavior, page C-4
Setting the Preferred Boot Device, page C-4
Bad/invalid/0MB drive handling:
MegaRAID: The bad drive is marked BAD in the GUI/CLI interfaces and the fault LED on the
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drive is solid amber.
HBA: The bad drive is not shown in the GUI/CLI and there is no LED indication.
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Drive predictive failure:
MegaRAID: If the drive is part of a RAID volume with a spare, the software performs an
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auto-copy backup and then marks the drive failed/BAD with the fault LED on the drive solid
amber.
HBA: There is no error handling and there is no LED indication. The operating system must
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handle the fault.
Appendix C
RAID Controller Considerations
OL-32473-01
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