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.
Path example
Path format
Device
PcieRoot(0x30304352)/Pci(0x2,0x0)/
Pci(0x0,0x0)/Scsi(0x0,0x0)
UID
PCIe root bridge device path
node
(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)
/HD(1,GPT,27C34F01-9F1E-11DE-A0BB-AA000400FEFF)
HD
(Partition,Type,Signature)
Hard drive partition device
path
(RAID mode)
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
142
Utilities