Date: Sun, 9 Jan 2011 11:27:09 +0200 From: Zeus V Panchenko <zeus@ibs.dn.ua> To: "Luchesar V. ILIEV" <luchesar.iliev@gmail.com> Cc: freebsd-geom@freebsd.org Subject: Re: "secondary GPT table is corrupt or invalid" issue again Message-ID: <20110109092709.GC66627@relay.ibs.dn.ua> In-Reply-To: <4D28FB15.9090907@gmail.com> References: <20110104170611.GA67159@relay.ibs.dn.ua> <4D28509D.607@yandex.ru> <20110108223747.GA66627@relay.ibs.dn.ua> <4D28FB15.9090907@gmail.com>
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Hi Luchesar,
thank you for reply,
>
> Just my two cents. If I understood correctly from your first mail,
> you've set up the gmirror on /dev/ada{1,2}p1; that is, you're not
> mirroring the whole disk, but just the (single) partition on it.
>
really the history was this:
i configured first drive as GPT (whole dedicated drive), newfs-ed it
and filled with data
after what i created mirror on it but not on entire disk /dev/ada0 (not on it's
single partition /dev/ada0p1) and i believe it was the cause of corruption
latter i found maillist explanation of the mistake and reconfigured
the mirror to use partitions instead of entire disk ... so, this way
the corruption appeared as i can judge now
> have overwritten the secondary GPT. I was wondering if your problem
> could be related to the ahci(4) driver? I think I've seen reports of
no, i do not believe it is ahci(4) related issue since no other
simpthomes were observed (smart data shows no problems too)
>
> # gmirror label -v -h -b load gm0 gpt/teradisk0
> # gmirror insert -v -h -p 1 gm0 gpt/teradisk1
>
> Using -h is important here, as otherwise gmirror will "forget" the
> labels. I'd like to draw your attention to the -p parameter as well.
> AFAIK it's not good to have the components with equal priority. Priority
> determines not only the preferred disk for the "prefer" algorithm, but,
mmm ... what will happend when master dies? will gmirror understand
that 0 priority disk now the one remaining alive? or i have to handle
that manually? to reassign 0 to the survived disk and to assign next
index to the new disk?
--
Zeus V. Panchenko
IT Dpt., IBS ltd GMT+2 (EET)
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