Date: Tue, 23 Oct 2001 18:30:23 +0930 From: Greg Lehey <grog@FreeBSD.org> To: Ben Eisenbraun <bene@nitrogen.nexthop.net> Cc: freebsd-questions@freebsd.org Subject: Re: recovery of corrupt vinum plexes? Message-ID: <20011023183023.M27668@wantadilla.lemis.com> In-Reply-To: <20011023044950.A43848@nitrogen.nexthop.net>; from bene@nitrogen.nexthop.net on Tue, Oct 23, 2001 at 04:49:50AM -0400 References: <20011023044950.A43848@nitrogen.nexthop.net>
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On Tuesday, 23 October 2001 at 4:49:50 -0400, Ben Eisenbraun wrote:
> Howdy-
>
> I'm hoping someone knows if it's possible to recover from a vinum state
> like the one below. I wedged the NIC somehow and during the reboot,
> the machine paniced while coming up; I rebooted a few more times before
> getting it to single user.
>
> vinum -> list
> 8 drives:
> D max1 State: up Device /dev/ad0e Avail: 19529/19529 MB (100%)
> D max2 State: up Device /dev/ad2e Avail: 19529/19529 MB (100%)
> D wd1 State: up Device /dev/ad8e Avail: 57239/57239 MB (100%)
> D wd2 State: up Device /dev/ad10e Avail: 57239/57239 MB (100%)
> D max3 State: referenced Device Avail: 0/0 MB
> D max4 State: referenced Device Avail: 0/0 MB
Is this information correct (i.e. you have six drives)?
> 2 volumes:
> V stripe-mirror State: up Plexes: 2 Size: 111 GB
> V var-mirror State: up Plexes: 2 Size: 19 GB
>
> 4 plexes:
> P stripe-mirror.p0 S State: corrupt Subdisks: 2 Size: 111 GB
> P stripe-mirror.p1 S State: corrupt Subdisks: 2 Size: 111 GB
> P var-mirror.p0 C State: up Subdisks: 1 Size: 19 GB
> P var-mirror.p1 C State: up Subdisks: 1 Size: 19 GB
>
> 6 subdisks:
> S stripe-mirror.p0.s0 State: crashed PO: 0 B Size: 55 GB
> S stripe-mirror.p0.s1 State: up PO: 512 kB Size: 55 GB
> S stripe-mirror.p1.s0 State: crashed PO: 0 B Size: 55 GB
> S stripe-mirror.p1.s1 State: up PO: 512 kB Size: 55 GB
> S var-mirror.p0.s0 State: up PO: 0 B Size: 19 GB
> S var-mirror.p1.s0 State: up PO: 0 B Size: 19 GB
>
> I tried grabbing the requested log info from the vinum slices, but the
> output didn't turn out as expected:
>
> # for i in /dev/ad4s1e /dev/ad6s1e /dev/ad8s1e /dev/ad10s1e ; do
>> (dd if=$i skip=8 count=6|tr -d '\000-\011\200-\377'; echo) >> log
>> done
> 1~^R:/uB
> ^O1u[^_US]^PSu^Lu#9u1^Th^]#h$#V]^LUWVS]=<*u}=*u^Oh 7**j^Pj^P5*{u+hd5*h$=\)T^Yt^ThE#80$^T*<*u1^Z9^]*
> ^O5^T*15$^O^M$^\$!^O=^X$=^P$15x$^M`$>^Md$P5*^Of15x$)5* ^]*0^P*^L*E^LE05))9u^Pvu^PU^PU^O6^MP$^]0^K^?
> <)k)9^P*tI=*u^Oh *5^T*^Md$)P5*^O)^P*C=t$^U*:^K^? C^MP$^M)9w^Ru;)w50$^X5)#58)5@)#5L$9=^L*t*P^Md$P5*S
> ^O=^L*0#8));uvuV*PMQu50)u^OE^Pe[^_^LUWVS=<*^OU=^X*u^Ohx^X*4*jj5^X*^O^]^X*,*w=1zu^W
> uw^KFu^Mt^PFv=,*u,*t#t\{t
> hN#C4*j4*@P5^X*(uy^M^X*9WEVu^LWEVt^P=0*tihT#E=8*u^Wfyu
> $*8*^O^U0*9s^Ou^VhZ#h$#4#4*u^P4*E^LE^LPue[^_^LU^PWVS}u^L%^O^OGst%^?
>
> (I have a feeling this bodes ill.)
Yes. This drive contains no Vinum label. Are ad4s1e and ad6s1e the
correct device names?
> The logfile at /var/log/vinum_history contains no relevant info.
>
> I do have copies of the original configuration files, and the "How to
> debug vinum" page mentions that it may be possible to re-create the
> on-disk configuration, but I'm not sure what steps I need to take to
> try this.
>
> I'm guessing I could 'resetconfig', 'create -f my-config-file' and
> then not 'init' the plex, but I thought I would seek advice before
> doing that.
That's a very good idea, to ask advice first. init writes zeros to
the entire plex, probably not what you want.
> I have a trace from the crash and some other info that spewed on the
> console if it's of interest.
Well, that's what I ask for in "How to debug", along with a lot of
other stuff. But since your Vinum drives seem to have disappeared,
that's where you need to look first. What drives do you have on the
system? If those two I mentioned above are correct, what do their
(Microsoft) partition tables and disk labels look like? What does
'vinum dumpconfig -v' say?
Greg
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