Hi Michael. Based on the output, there should be no user-visible file corruption. ZFS saw a bunch of checksum errors on the disk, but was able to recover in every instance.
While 2-disk RAID-Z is really a fancy (and slightly more expensive, CPU-wise) way of doing mirroring, at no point should your data be at risk. I've been working on ZFS a long time, and if what you say is true, it will be the first instance I have ever seen (or heard) of such a phenomenon. I strongly doubt that somehow ZFS returned corrupted data without knowing about it. How are you sure that some application on your box didn't modify the contents of the files? --Bill On Sat, Nov 18, 2006 at 02:01:39AM -0800, [EMAIL PROTECTED] wrote: > I'm new to this group, so hello everyone! I am having some issues with my > Nexenta system I set up about two months ago as a zfs/zraid server. I have > two new Maxtor 500GB Sata drives and an Adaptec controller which I believe > has a Silicon Image chipset. Also I have a Seasonic 80+ power supply, so the > power should be as clean as you can get. I had an issue with Nexenta where I > had to reinstall, and since then everytime I reboot I have to type > > zpool export amber > zpool import amber > > to get my zfs volume mounted. A week ago I noticed a couple of CKSUM errors > when I did a zpool status, so I did a zpool scrub. This is the output after: > > # zpool status > pool: amber > state: ONLINE > status: One or more devices has experienced an unrecoverable error. An > attempt was made to correct the error. Applications are unaffected. > action: Determine if the device needs to be replaced, and clear the errors > using 'zpool clear' or replace the device with 'zpool replace'. > see: http://www.sun.com/msg/ZFS-8000-9P > scrub: scrub completed with 0 errors on Mon Nov 13 04:49:35 2006 > config: > > NAME STATE READ WRITE CKSUM > amber ONLINE 0 0 0 > raidz1 ONLINE 0 0 0 > c4d0 ONLINE 0 0 51 > c5d0 ONLINE 0 0 41 > > errors: No known data errors > > > I have md5sums on a lot of the files and it looks like maybe 5% of my files > are corrupted. Does anyone have any ideas? I was under the impression that > zfs was pretty reliable but I guess with any software it needs time to get > the bugs ironed out. > > Michael > _______________________________________________ > 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
