Messages in this thread | | | From | Andreas Dilger <> | Subject | Re: Drive name slips... | Date | Wed, 16 Feb 2000 21:41:11 -0700 (MST) |
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Ashok Raj writes: > Linux kernel names the scsi drives sda, sdb .... so in case you switch > slots, or move across to a different controller > then its possible you can have very bad effects. Worst case is removing a > drive and the drive device files dont have a persistant assiciation with the > location, or do we have a magic superblock what the configured name was. > > is there a solution to Linux for this? i was looking at raid, but the config > file says /dev/sda etc, and it says it does do the superblock magic to avoid > this. In a SAN its more important as a remote scsi disk may be detectect in > a different order.
If you are using ext2 filesystems, you can use the ext2 filesystem "label" instead of the device in /etc/fstab, so you don't get burned by drive name or address changes. See mount(8) and fstab(5) for more info (a newer version of mount is required to support labels).
IMHO, the Solaris/devfs method of specifying drives by controller/drive/partition is not much better than the current system, as you still have problems if the SCSI ID is changed, or if you add a new controller and the controller numbering changes.
Cheers, Andreas -- Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto, \ would they cancel out, leaving him still hungry?" http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert
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