Date: Fri, 25 Jun 2004 18:47:14 -0700 From: "Benjamin P. Keating" <bkeating@gmail.com> To: freebsd-questions@freebsd.org Subject: fsck'ing a Vinum RAID5 volume (and a stale drive) Message-ID: <1d54d54404062518474bbb3494@mail.gmail.com>
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This is a good one.
$ uname -a
FreeBSD 4.7-RELEASE FreeBSD 4.7-RELEASE #0: Wed Oct 9 15:08:34 GMT
2002 root@builder.freebsdmall.com:/usr/obj/usr/src/sys/GENERIC
i386
First I'll explain the stale/degraded issue. Then ask about fsck on a
raid5 vinum. My goal is to have the vinum volume check out OK with
fsck and to do a 'vinum list' and have 'State: up' all the way down
the list. This is a RAID5 holding backup copies of other servers.
----
$ vinum list
7 drives:
D a State: up Device /dev/ad4s1f Avail:
0/114473 MB (0%)
D b State: up Device /dev/ad6s1f Avail:
0/114473 MB (0%)
D c State: up Device /dev/ad8s1f Avail:
0/114473 MB (0%)
D d State: up Device /dev/ad10s1f Avail:
0/114473 MB (0%)
D e State: up Device /dev/ad12s1f Avail:
0/114473 MB (0%)
D f State: up Device /dev/ad14s1f Avail:
0/114473 MB (0%)
D g State: up Device /dev/ad16s1f Avail:
0/114473 MB (0%)
1 volumes:
V backup State: up Plexes: 1 Size: 670 GB
1 plexes:
P backup.p0 R5 State: degraded Subdisks: 7 Size:
670 GB
7 subdisks:
S backup.p0.s0 State: up PO: 0 B Size: 111 GB
S backup.p0.s1 State: up PO: 384 kB Size: 111 GB
S backup.p0.s2 State: up PO: 768 kB Size: 111 GB
S backup.p0.s3 State: stale PO: 1152 kB Size: 111 GB
S backup.p0.s4 State: up PO: 1536 kB Size: 111 GB
S backup.p0.s5 State: up PO: 1920 kB Size: 111 GB
S backup.p0.s6 State: up PO: 2304 kB Size: 111 GB
I've found on the net that I can switch the state by doing:
$ vinum setstate up backup.p0 backup.p0.s3
and it does indeed bring the state back up so then it was recommneded to
$ vinum saveconfig
I rebooted, the state is "up" so I unmounted the volume to fsck it. Is
this approach correct? does this do anything productive or just forces
the state label to change and do nothing to the drives? I don't feel
confident that it did anything and Im having a VERY hard time finding
documentation on this.
----
the vinum vol is unmounted, so now I do a :
$ fsck -n /dev/vinum/backup
and get tons of bad news scrolling up the screen. Lots of this:
%<-------------------------------
bigbang:root> fsck -n /dev/vinum/backup
** /dev/vinum/backup (NO WRITE)
** Last Mounted on /backup
** Phase 1 - Check Blocks and Sizes
529516494 BAD I=12
31580655 BAD I=12
-588350257 BAD I=12
1849227449 BAD I=12
490256604 BAD I=12
1896046100 BAD I=12
1065221887 BAD I=12
422657855 BAD I=12
1511116800 BAD I=12
1663396533 BAD I=12
-13685115 BAD I=12
EXCESSIVE BAD BLKS I=12
CONTINUE? yes
INCORRECT BLOCK COUNT I=12 (80557504 should be 262656)
CORRECT? no
INCORRECT BLOCK COUNT I=76903513 (416 should be 228)
CORRECT? no
PARTIALLY TRUNCATED INODE I=76903514
SALVAGE? no
PARTIALLY TRUNCATED INODE I=76903515
SALVAGE? no
-116589821 BAD I=76903515
-112723056 BAD I=76903515
-98501815 BAD I=76903515
-99813036 BAD I=76903515
-131467519 BAD I=76903515
-168168055 BAD I=76903515
-189794987 BAD I=76903515
-189532554 BAD I=76903515
-169084920 BAD I=76903515
-143787653 BAD I=76903515
-122160433 BAD I=76903515
EXCESSIVE BAD BLKS I=76903515
CONTINUE? yes
INCORRECT BLOCK COUNT I=76903515 (1056 should be 368)
CORRECT? no
PARTIALLY TRUNCATED INODE I=76903516
SALVAGE? no
%<-------------------------------
Im assuming I'll want to answer yes to at least some of those. Can I
say yes to all of them? What errors should I say no to? I have no idea
whats bad bad and whats correctable.
Now. because this is a raid5 volume, are some of these fsck prompts
false positives? ie; fsck is giving a error but really it's fine as
it's raid5?
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