Upcoming IBM pSeries firmware can boot from iscsi. To configure the
openfirmware boot-device string, we need to construct a correct
devicepath. This path includes the lun. Its currently not 100% clear
how exactly this lun value has to look like.
sg_luns may be the tool to get the value. But its current output is not
parseable by scripts. It even gives the same output for two different
scsi devices:
girgendwas:~ # lsscsi
[0:0:0:0] disk DGC RAID 5 0219 /dev/sda
[0:0:0:1] disk DGC RAID 5 0219 /dev/sdb
[0:0:0:2] disk DGC RAID 5 0219 /dev/sdc
[0:0:0:3] disk DGC RAID 5 0219 /dev/sdd
girgendwas:~ # sg_luns -V
sg_luns: version: 1.05 20060127
girgendwas:~ # sg_luns /dev/sdd
Lun list length = 32 which imples 4 lun entries
Report luns [select_report=0]:
0000000000000000
0001000000000000
0002000000000000
0003000000000000
girgendwas:~ # sg_luns /dev/sdc
Lun list length = 32 which imples 4 lun entries
Report luns [select_report=0]:
0000000000000000
0001000000000000
0002000000000000
0003000000000000
Is it possible to print the lun only for the requested scsi device?
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