98
IBM
Eserver
xSeries 455 Planning and Installation Guide
Access to the file system on a device is done through the
FSn:
command (where
n
is the file system number shown in the device mapping table). This is similar in
concept to changing drive letters in DOS. You can use the
map
command at any
time to remind yourself of the available file systems.
As an example of the capability of accessing file systems, the following are the
steps to access data stored on the USB memory key device:
1. Insert the USB memory key into the USB port (can be hot-added).
2. Start the EFI shell from the EFI Firmware Boot Manager menu.
3. Use the
map
command to identify the appropriate mapping for the USB device
the EFI automatically created. Sample output of the command is in
Figure 4-4.
If the appropriate mapping does not appear, run
map -r
, where parameter -r
forces EFI to refresh the device mapping table.
Figure 4-4 Map command
Tip: All the EFI executable files have an extension of .EFI. The executables
may be run only from within EFI, not from within any operating system.
Tip: Adding or removing media may cause arbitrary reassignments of the FSx
designations. Always make sure that you access the right media by issuing the
map
command or
map -r
if media has been added or removed.
Shell> map
Device Mapping Table
fs0 : MemMap(0:FF000000-FFFFFFFF)
fs1 : MemMap(0:FF800200-FFBFFFFF)
fs2 : Acpi(PNP0A03,0)/Pci(5|2)/Usb(0, 0)/HD(Part1,Sig00000000)
blk0 : MemMap(0:FF000000-FFFFFFFF)
blk1 : MemMap(0:FF800200-FFBFFFFF)
blk2 : Acpi(PNP0A03,0)/Pci(5|1)/Ata(Primary,Master)
blk3 : Acpi(PNP0A03,0)/Pci(5|1)/Ata(Primary,Slave)
blk4 : Acpi(PNP0A03,1)/Pci(3|0)/Scsi(Pun0,Lun0)
blk5 : Acpi(PNP0A03,0)/Pci(5|2)/Usb(0, 0)
blk6 : Acpi(PNP0A03,0)/Pci(5|2)/Usb(0, 0)/HD(Part1,Sig00000000)
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