gvinum raid5 in production

[D X]

I know the FreeNAS project has been using 6.1-release.
A number of people have complained about problems with gvinum running RAID
5.

I haven't been following up on this in the past couple of months, but if
you're looking for bugs, you might want to contact Olivier Cochard, the lead
of the freenas project.

http://www.freenas.org/




On 9/12/06, Mark Bucciarelli <mark at gaiahost.coop> wrote:
>
> Is anybody using gvinum raid5 in production with 6.1-release?  How is it
> going?
>
> Have you every had any instances where a kernel panic caused the
> raid-array
> not to rebuild properly on reboot and you had data loss?
>
> Has your array been robust to SCSI errors from your drives?
>
> I reviewed all problem reports I could find and only 89660 looked serious.
>
>    Dec. 2005 (6.0): kernel panic (perhaps due to low memory)
>    caused by code in geom perhaps. Looks like raid rebuilds
>    properly, only b/c poster didn't mention any problem.  Patch
>    included.  (Hmmm, gvinum code doesn't check for null pointers
>    returned by malloc.) [1]
>
>    Sep. 2005 (6.0): probably not geom-related (according to
>    poster).  Kernel panic when copying large file (2 Gb). [2]
>
>    Feb. 2005 (5.3): A newfs bug caused by an integer overflow
>    when entering stupidly large values when creating a new file
>    system.  No risk. [3]
>
>    Nov. 2005 (5.3): Pulls a drive from raid 5 (w/o turning off
>    machine, I _think_), get's SCSI errors, and kernel panics.
>    Older machine?  (Pentium Pro) [4]
>
> As a followup question, in case of kernel panic, coredump and subsequent
> savecore, is it safe to have swap on a gmirror raid1?  How about on gvinum
> raid 5?
>
> m
>
> [1] http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/89660
>
> [2] http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/85728
>
> [3] http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/77181
>
> [4] http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/73830
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