Drive paths in UEFI
Devices in the server 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.
Path examplePath formatDevice
PcieRoot(0x30304352)/Pci(0x2,0x0)/
Pci(0x0,0x0)/Scsi(0x0,0x0)
(RAID mode)
UIDPCIe root bridge device path
node
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)
/HD(1,GPT,27C34F01-9F1E-11DE-A0BB-AA000400FEFF)
(RAID mode)
HD
(Partition,Type,Signature)
Hard drive partition device
path
PcieRoot(0x30304352)/Pci(0x2,0x0)/Pci(0x0,0x0)/
SAS(0x5000C500037688B9,0x0,0x1,NoTopology,0,0,0,
0x0) )/HD
(1,GPT,27C34F01-9F1E-11DE-A0BB-AA000400FEFF)
(HBA mode)
PcieRoot(0x30304352)/Pci(0x1D,0x7)/
USB(0x3,0x0)/CDROM(0x1)
CDROM(Entry)CD-ROM / DVD-ROM
partition device path
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 Options
• Boot From File
• Set Boot Next Value
• Set Time Out Value
• Reset System
138 Utilities
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