SCSI host/channel/lun/part to /dev/sd* or maj/minor mapping
Mark Atwood write:
Quoted 6 lines
Is there a mapping between the Host,Channel,Id,Lun of a SCSI device as reported in
/proc/scsi/scsi, and the the/dev/sd*names and/or the major/minor device numbers?I've done some experamentation, and the more obvious ways of doing the mapping dont seem to be 100%.
Mark,
There are several utilities discussed at this url:
http://www.torque.net/sg/u_index.html
including scsidev and sg_map. Devfs shows you this mapping via its hierarchy:
$ ls -l total 0 brw------- 1 root root 8, 0 Dec 31 1969 disc crw-r----- 1 root root 21, 0 Dec 31 1969 generic brw------- 1 root root 8, 1 Dec 31 1969 part1 $ pwd /dev/scsi/host1/bus0/target0/lun0/
None of these approaches is completely satisfactory. Kurt Garloff is working on a patch that seems to address this problem quite cleanly:
$ cat /proc/scsi/map # C,B,T,U Type onl sg_nm sg_dev nm dev 0,0,00,00 05 1 sg0 c:15:00 sr0 b:0b:00 1,0,01,00 05 1 sg1 c:15:01 sr1 b:0b:01 1,0,03,00 05 1 sg3 c:15:03 sr2 b:0b:02 1,0,05,00 00 1 sg4 c:15:04 sda b:08:00 1,0,09,00 00 1 sg5 c:15:05 sdb b:08:10 1,0,02,00 01 1 sg2 c:15:02 osst0 c:ce:00 2,0,01,00 05 1 sg6 c:15:06 sr3 b:0b:03 2,0,02,00 01 1 sg7 c:15:07 osst1 c:ce:01 2,0,03,00 05 1 sg8 c:15:08 sr4 b:0b:04 2,0,09,00 00 1 sg10 c:15:0a sdd b:08:30 3,0,10,00 00 1 sg11 c:15:0b sde b:08:40 3,0,12,00 00 1 sg12 c:15:0c sdf b:08:50
Doug Gilbert