Re: Drive name slips...

[Chris Meadors]

"Raj, Ashok" wrote:
> 
> Hello..
> 
> 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.

devfs takes care of this.  With the devfs patches you can address your
drive by it's physical location, from controller all the way down to
partition.