Re: [zfs-discuss] Remove corrupt files from snapshot
Use zpool status -v to see if any errors come up. Then you can use zpool scrub
to remove at least some of them. I have had luck with this in the past.
---Todd
On Nov 14, 2011, at 04:25 , sbre...@hotmail.com sbre...@hotmail.com wrote:
Back to this topic, since I cannot touch snapshots I thought I could simply
remove the corrupt files after the last snapshot, so the next incremental
backup will notice the difference (i.e. no file) and overwrite the
corrupt-and-removed files with valid ones. This was the plan.
However, while checking for corrupt files, find stops at some directory
with fts_read: Not a directory:
find . -exec md5 {} \; /home/xxx/md5_out 2 /home/xxx/md5_err
tail /home/xxx/md5_err
...
md5: ./.zfs/snapshot/20100323081201/Bazsi/Projects/Java Test
Client/java_test_client/lib/xxx/weblogic.jar: Input/output error
md5: ./.zfs/snapshot/20100323081201/@Cache (Bazsi)/BMWi
SP/Publikationen/PDF-Broschâ–’ren/Nexxt.pdf: Input/output error
find: fts_read: Not a directory
What does this error mean? I cannot even scan the ZFS file system anymore?
Is there any fsck for ZFS?
Cheers,
B.
From: zfsdisc...@orgdotuk.org.uk
To: zfs-discuss@opensolaris.org
Date: Mon, 7 Nov 2011 21:49:56 +
Subject: Re: [zfs-discuss] Remove corrupt files from snapshot
-Original Message-
From: Edward Ned Harvey
Sent: 04/11/2011 21:23
You need to destroy the snapshot completely - But if you want
to selectively
delete from a snapshot, I think you can clone it, then
promote the clone,
then destroy the snapshot, then rm something from the clone and then
snapshot the clone back to the original name, and then
destroy the clone.
Right?
Not so fast! :-)
If you promote this new clone, the current state / branch of your filesystem
becomes a clone instead, dependent on the snapshot.
Then if you try to destroy the snapshot, you'll fail, because it has a
dependent clone (your current fs!!!). If you continue
without realising the implications, and so try the 'destroy' again with
'-R', there goes the neighbourhood!
I did this once, and was only saved by the fact that my cwd was in my
current filesystem, so couldn't be unmounted, and therefore
couldn't be removed! Phew!! Nice to learn something and only get singed
eyebrows, instead of losing a leg!
hth Andy
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Re: [zfs-discuss] Zpool with data errors
I'll be doing this over the upcoming weekend so I'll see how it goes. Thanks for all of the suggestions. Todd On Jun 22, 2011, at 10:48 AM, Cindy Swearingen cindy.swearin...@oracle.com wrote: Hi Todd, Yes, I have seen zpool scrub do some miracles but I think it depends on the amount of corruption. A few suggestions are: 1. Identify and resolve the corruption problems on the underlying hardware. No point in trying to clear the pool errors if this problem continues. The fmdump command and the fmdump -eV command output will tell you how long these errors have occurred. 2. Run zpool scrub and zpool clear to attempt to clear the errors. 3. If the errors below don't clear, then manually remove the corrupted files below, if possible, and restore from backup. Depending on what fmdump says, you might check your backups for corruption. 4. Run zpool scrub and zpool clear again as needed. 5. Consider replacing this configuration with a redundant ZFS storage pool. We can provide the recommended syntax. Let us know how this turns out. Thanks, Cindy On 06/20/11 23:36, Todd Urie wrote: I have a zpool that shows the following from a zpool status -v zpool name brsnnfs0104 [/var/spool/cron/scripts]# zpool status -v ABC0101 pool:ABC0101 state: ONLINE status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action: Restore the file in question if possible. Otherwise restore the entire pool from backup. see: http://www.sun.com/msg/ZFS-8000-8A scrub: none requested config: NAME STATE READ WRITE CKSUM ABC0101 ONLINE 0 010 /dev/vx/dsk/ABC01dg/ABC0101_01 ONLINE 0 0 2 /dev/vx/dsk/ABC01dg/ABC0101_02 ONLINE 0 0 8 /dev/vx/dsk/ABC01dg/ABC0101_03 ONLINE 0 010 errors: Permanent errors have been detected in the following files: /clients/ABC0101/rep/local/bfm/web/htdocs/tmp/rscache/717b52282ea059452621587173561360 /clients/ABC0101/rep/local/bfm/web/htdocs/tmp/rscache/6e6a9f37c4d13fdb3dcb8649272a2a49 /clients/ABC0101/rep/d0/prod1/reports/ReutersCMOLoad/ReutersCMOLoad.ABCntss001.20110620.141330.26496.ROLLBACK_FOR_UPDATE_COUPONS.html /clients/ABC0101/rep/local/bfm/web/htdocs/tmp/G2_0.related_detail_loader.1308593666.54643.n5cpoli3355.data /clients/ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/F_OLPO82_A.gp.ABCIM_GA.nlaf.xml.gz /clients/ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/UNVLXCIAFI.gp.ABCIM_GA.nlaf.xml.gz /clients/ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/UNIVLEXCIA.gp.BARCRATING_ABC.nlaf.xml.gz I think that a scrub at least has the possibility to clear this up. A quick search suggests that others have had some good experience with using scrub in similar circumstances. I was wondering if anyone could share some of their experiences, good and bad, so that I can assess the risk and probability of success with this approach. Also, any other ideas would certainly be appreciated. -RTU ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] Zpool with data errors
The volumes sit on HDS SAN. The only reason for the volumes is to prevent inadvertent import of the zpool on two nodes of a cluster simultaneously. Since we're on SAN with Raid internally, didn't seem to we would need zfs to provide that redundancy also. On Tue, Jun 21, 2011 at 4:17 AM, Remco Lengers re...@lengers.com wrote: ** Todd, Is that ZFS on top of VxVM ? Are those volumes okay? I wonder if this is really a sensible combination? ..Remco On 6/21/11 7:36 AM, Todd Urie wrote: I have a zpool that shows the following from a zpool status -v zpool name brsnnfs0104 [/var/spool/cron/scripts]# zpool status -v ABC0101 pool: ABC0101 state: ONLINE status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action: Restore the file in question if possible. Otherwise restore the entire pool from backup. see: http://www.sun.com/msg/ZFS-8000-8A scrub: none requested config: NAME STATE READ WRITE CKSUM ABC0101 ONLINE 0 010 /dev/vx/dsk/ ABC01dg/ ABC0101_01 ONLINE 0 0 2 /dev/vx/dsk/ ABC01dg/ ABC0101_02 ONLINE 0 0 8 /dev/vx/dsk/ ABC01dg/ ABC0101_03 ONLINE 0 010 errors: Permanent errors have been detected in the following files: /clients/ABC0101/rep/local/bfm/web/htdocs/tmp/rscache/717b52282ea059452621587173561360 /clients/ ABC0101/rep/local/bfm/web/htdocs/tmp/rscache/6e6a9f37c4d13fdb3dcb8649272a2a49 /clients/ ABC0101/rep/d0/prod1/reports/ReutersCMOLoad/ReutersCMOLoad. ABCntss001.20110620.141330.26496.ROLLBACK_FOR_UPDATE_COUPONS.html /clients/ ABC0101/rep/local/bfm/web/htdocs/tmp/G2_0.related_detail_loader.1308593666.54643.n5cpoli3355.data /clients/ ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/F_OLPO82_A.gp. ABCIM_GA.nlaf.xml.gz /clients/ ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/UNVLXCIAFI.gp. ABCIM_GA.nlaf.xml.gz /clients/ ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/UNIVLEXCIA.gp.BARCRATING_ ABC.nlaf.xml.gz I think that a scrub at least has the possibility to clear this up. A quick search suggests that others have had some good experience with using scrub in similar circumstances. I was wondering if anyone could share some of their experiences, good and bad, so that I can assess the risk and probability of success with this approach. Also, any other ideas would certainly be appreciated. -RTU ___ zfs-discuss mailing listzfs-discuss@opensolaris.orghttp://mail.opensolaris.org/mailman/listinfo/zfs-discuss -- -RTU ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
[zfs-discuss] Zpool with data errors
I have a zpool that shows the following from a zpool status -v zpool name brsnnfs0104 [/var/spool/cron/scripts]# zpool status -v ABC0101 pool:ABC0101 state: ONLINE status: One or more devices has experienced an error resulting in data corruption. Applications may be affected. action: Restore the file in question if possible. Otherwise restore the entire pool from backup. see: http://www.sun.com/msg/ZFS-8000-8A scrub: none requested config: NAME STATE READ WRITE CKSUM ABC0101 ONLINE 0 010 /dev/vx/dsk/ABC01dg/ABC0101_01 ONLINE 0 0 2 /dev/vx/dsk/ABC01dg/ABC0101_02 ONLINE 0 0 8 /dev/vx/dsk/ABC01dg/ABC0101_03 ONLINE 0 010 errors: Permanent errors have been detected in the following files: /clients/ABC0101/rep/local/bfm/web/htdocs/tmp/rscache/717b52282ea059452621587173561360 /clients/ ABC0101/rep/local/bfm/web/htdocs/tmp/rscache/6e6a9f37c4d13fdb3dcb8649272a2a49 /clients/ABC0101/rep/d0/prod1/reports/ReutersCMOLoad/ReutersCMOLoad. ABCntss001.20110620.141330.26496.ROLLBACK_FOR_UPDATE_COUPONS.html /clients/ ABC0101/rep/local/bfm/web/htdocs/tmp/G2_0.related_detail_loader.1308593666.54643.n5cpoli3355.data /clients/ ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/F_OLPO82_A.gp. ABCIM_GA.nlaf.xml.gz /clients/ ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/UNVLXCIAFI.gp. ABCIM_GA.nlaf.xml.gz /clients/ ABC0101/rep/d0/prod1/reports/gp_reports/ALLMNG/20110429/UNIVLEXCIA.gp.BARCRATING_ ABC.nlaf.xml.gz I think that a scrub at least has the possibility to clear this up. A quick search suggests that others have had some good experience with using scrub in similar circumstances. I was wondering if anyone could share some of their experiences, good and bad, so that I can assess the risk and probability of success with this approach. Also, any other ideas would certainly be appreciated. -RTU ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] ZFS file system without pool
A ZFS filesystem without a zpool doesn't make much sense. Unless I'm badly mistaken, you have to have the pool to get the filesystem. As far as using a Veritas volume for the zpools, that is easily done. We do that where I work for almost all of our ZFS filesystems as a way to facilitate cluster failover of the filesystems and ensure that the zpool can't be imported on two nodes simultaneously. You just specify the VxVM volumes as the block devices when you configure the zpool. Of course, you have to import the releveant disk group before you can import the zpool. On Wed, Sep 15, 2010 at 8:25 AM, Ramesh Babu rama.b...@gmail.com wrote: I would like to know if I can create ZFS file system without ZFS storage pool. Also I would like to know if I can create ZFS pool/ZFS pool on Veritas Volume. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
