Table 42 UEFI shell commands (continued)
DefinitionUEFI shell command
Stalls the processor for the specified number of microsecondsstall
Boot from tapetapeboot
Perform TFTP operationtftp
Displays or changes the current system timetime
Displays or sets time zone informationtimezone
Updates filename timestamp with current system date and timetouch
Displays file contentstype
Unloads a UEFI driverunload
Displays UEFI Firmware version informationver
Displays or changes a file system volume labelvol
Turn on/off extended character featuresxchar
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)
UIDPCIe 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
Drive paths in UEFI 137
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