zpool CKSUM 0 --> 1 while resilvering
web at 3dresearch.com
Tue Feb 16 10:13:09 UTC 2021
On Mon, 15 Feb 2021 12:56:31 -0800
David Christensen <dpchrist at holgerdanske.com> wrote:
> On 2021-02-15 10:11, Janos Dohanics wrote:
> > [...]
> > # zpool status
> > pool: zroot
> > 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://illumos.org/msg/ZFS-8000-9P
> > scan: resilvered 1.97T in 0 days 08:25:27 with 0 errors on Mon
> > Feb 15 05:09:47 2021 config:
> > NAME STATE READ WRITE CKSUM
> > zroot ONLINE 0 0 0
> > mirror-0 ONLINE 0 0 0
> > ada0p3 ONLINE 0 0 0
> > ada3p3 ONLINE 0 0 1
> > ada2p3 ONLINE 0 0 0
> > errors: No known data errors
> > No errors reported by smartctl(8) for /dev/ada3.
> > Can I consider this a harmless error and should I just run "zpool
> > clear ada3p3'?
> > Please advise.
> STFW 'zpool status cksum':
> I would:
> 1. Check for interface, cable, and/or rack errors. These should
> generate error messages in dmesg(8) and /var/log/messages. I
> especially hate red, non-locking SATA cables without any speed
> marking. More than a few people agree that the red dye in the
> insulation will corrode copper. I have replaced all of my SATA
> cables with new black, locking, 6 Gbps SATA cables (made by Cable
Red SATA cables? I was certainly ignorant about this!
> 2. If and when all of the above is okay, I would run SMART short and
> long tests on all three drives. (I used to believe in manufacturer
> diagnostic tools, but recent experiences with Seagate and Western
> Digital have convinced me otherwise; notably when following up with
> technical support. If anyone knows of a brand of HDD with good
> drives, good diagnostic tools, and good technical support, please
> 3. If and when all of the above is okay, I would scrub the pool.
> 4. If and when all of the above is okay and CKSUM remains (#3 might
> clear it?), I would do the 'zpool clear ...'.
Thank you for the comprehensive advice, I'm glad I asked...
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