Drive paths in UEFI
Devices in the server blade are represented by device paths in the UEFI shell. Each internal SAS drive could be configured either as:
•RAID mode
•HBA (raw) mode
NOTE: A SAS drive in RAID mode is identified by "Scsi" in the device path A SAS drive in HBA mode is identified by “SAS” in the device path.
NOTE: Unlike parallel SCSI, you cannot correlate UEFI device paths to internal SAS disk drive bays with SAS regardless of RAID/HBA mode. The UEFI device paths currently do not contain any information that could be used to determine the physical location of the drives.
Device | Path format |
PCIe root bridge device path | UID |
node |
|
Hard drive partition device | HD |
path | (Partition,Type,Signature) |
|
CDROM(Entry) | |
partition device path |
|
Path example
PcieRoot(0x30304352)/Pci(0x2,0x0)/
Pci(0x0,0x0)/Scsi(0x0,0x0)
(RAID mode)
PcieRoot(0x30304352)/Pci(0x2,0x0)/Pci(0x0,0x0)
/SAS(0x5000C500037688B9,0x0,0x1,NoTopology,
0,0,0,0x0)
(HBA mode)
PcieRoot(0x30304352)/Pci(0x2,0x0)/Pci(0x0,0x0)/
Scsi(0x0,0x0)
(RAID mode)
PcieRoot(0x30304352)/Pci(0x2,0x0)/Pci(0x0,0x0)/
SAS(0x5000C500037688B9,0x0,0x1,NoTopology,0,0,0, 0x0) )/HD
(HBA mode)
PcieRoot(0x30304352)/Pci(0x1D,0x7)/
USB(0x3,0x0)/CDROM(0x1)
NOTE: Everything after "Scsi" or "SAS" in the output can vary because each SAS drive/partition is unique
Using the Boot Maintenance Manager
This menu allows you to change various boot options. The Boot Maintenance Manager Contains the following submenus:
•Boot Options
•Driver Options
•Console Configuration
•Boot From File
•Set Boot Next Value
•Set Time Out Value
•Reset System
Drive paths in UEFI 135
