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fedora-users: Re: Fedora 15 + scsi tape drive

Re: Fedora 15 + scsi tape drive

From: Chris Adams <cmadams_at_nospam>
Date: Mon Oct 17 2011 - 01:15:58 GMT
To: users@lists.fedoraproject.org

Once upon a time, Cameron Simpson <cs@zip.com.au> said:
> I'm all ok with providing sda/hda as discovered, _provided_ one also has
> nice bus/id type names as well. Solaris' bus/id/partition drive names
> looked long and complicated but they were reliable - you could look at
> the device ids and know what the OS would call them.

See /dev/disk/by-{id,path,uuid}. This is also an advantage of LVM; it
knows how to find the physical volumes, and you generally don't have to
care (/dev/vg_foo is always /dev/vg_foo). Even Solaris' bus number
wasn't stable in the face of card changes IIRC.

The problem with enumerating devices by HBA/bus/ID/LUN is that today's
storage is more dynamic. USB ports are "SCSI" (protocol); how do you
number those? IIRC USB ports on a hub are not deterministically
ordered, so a flash card reader on a hub may come before a thumb drive
on one boot and after on the next.

-- Chris Adams <cmadams@hiwaay.net> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines