On Thu, Nov 26, 2009 at 5:29 PM, Scot Hetzel <swhet...@gmail.com> wrote: > On 11/26/09, Jeremy Chadwick <free...@jdc.parodius.com> wrote: >> I'm a bit curious about something, so maybe someone can help me >> understand: >> >> Why are people bothering with GPT labels (or in some cases, glabels) >> when AHCI (whether it be ataahci.ko or ahci.ko) is in use? Under what >> circumstance would the device name change dynamically in this situation? >> > > There was a thread about this problem where the drives had changed > their device names due to a change in the kernel drive (Current list > from July): > > http://lists.freebsd.org/pipermail/freebsd-current/2009-July/009377.html > > Through out this thread there were various suggests on how he could > recover the system, and prevent the problem from occurring in the > future. > > One of the suggestions was that use of zpool replace to change from > device names to using glabel labels. > > http://lists.freebsd.org/pipermail/freebsd-current/2009-July/009440.html > >> I've never witnessed this happening with AHCI, at least on Intel >> systems, and I've hot-swapped hard disks many times over. >> > > Using glabels, gpt labels, or gptid solves the problem of not needing > to remember which device name the drive originally had. For instance, > on a zfs zraid pool with 3 disks (ad1 ad2 ad3) you could disconnect > the pool from one computer and connect it to another system and it > wouldn't matter which order you reconnected the drives (1 2 3 or 3 1 > 2) as the pool would still be recognized when it is imported on the > new system. Also if the new system already has drives ad1 and ad2, it > wouldn't matter. > > Scot
for some reasons it sounds to me like 'avoiding problem' since device name shouldn't matter in zfs (or so I read) -- O< ascii ribbon campaign - stop html mail - www.asciiribbon.org _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
