Date: Wed, 08 Jul 2009 10:19:37 +0200 From: "Ronald Klop" <ronald-freebsd8@klop.yi.org> To: "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: Zfs on usb-disk checksum errors? Message-ID: <op.uwqpe0sn8527sy@82-170-177-25.ip.telfort.nl>
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Hi. I put zfs on my external usb-disk, so I can backup my harddisk with zfs send/receive. I now have corruption on this volume. [root@sjakie ~]# zpool status -v pool: extern 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: scrub completed after 0h2m with 0 errors on Wed Jul 8 00:35:09 2009 config: NAME STATE READ WRITE CKSUM extern ONLINE 1 0 0 da0 ONLINE 9 0 0 errors: Permanent errors have been detected in the following files: <0x3f>:<0xf5d6> I don't really understand which files have corruption. :-( In my syslog is this: (repeated quite often) Jul 8 10:00:37 sjakie kernel: (da0:umass-sim0:0:0:0): SYNCHRONIZE CACHE(10). CDB: 35 0 0 0 0 0 0 0 0 0 Jul 8 10:00:37 sjakie kernel: (da0:umass-sim0:0:0:0): CAM Status: SCSI Status Error Jul 8 10:00:37 sjakie kernel: (da0:umass-sim0:0:0:0): SCSI Status: Check Condition Jul 8 10:00:37 sjakie kernel: (da0:umass-sim0:0:0:0): ILLEGAL REQUEST asc:20,0 Jul 8 10:00:37 sjakie kernel: (da0:umass-sim0:0:0:0): Invalid command operation code Jul 8 10:00:37 sjakie kernel: (da0:umass-sim0:0:0:0): Unretryable error and sometimes Jul 8 10:00:35 sjakie root: ZFS: vdev I/O failure, zpool=extern path=/dev/da0 offset=127558877184 size=3072 error=5 Jul 8 10:00:35 sjakie root: ZFS: vdev I/O failure, zpool=extern path=/dev/da0 offset=127558877184 size=3072 error=5 Jul 8 10:00:35 sjakie root: ZFS: zpool I/O failure, zpool=extern error=5 With varying offsets and sizes. What can I conclude from this? Is the disk failing? Is the 'Invalid command operation code' something to worry about? It didn't show up when the disk was UFS. I reinstalled the pool but the read-errors showed up again. Thanks for any advice, Ronald.
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