[rescue] Solaris ZFS questions

Phil Stracchino alaric at metrocast.net
Wed Jan 12 14:42:28 CST 2011

On 01/12/11 15:20, John Lengeling wrote:
> I have a degraded zfs pool reporting permanent errors under Solaris 10.
> I was going to backup the existing data, destroy/create the pool and
> then restore the data.  I have a couple of questions.
> 1. I believe that the degraded drive had a read-error.  When I take this
> drive out of the pool, how can I verify that I can read/write all
> sectors?

When did you last do a zpool scrub?

What exactly is the disk configuration and which disk failed?  How many
disks are bad?

> 2. I tried to back up the data on the pool using GnuTAR with the
> --ignore-failed-read and GnuTar still errored/exited out and didn't just
> skip the file and continue writing.   How can I get around this as I
> thought that the ignore failed read would just skip the file and
> continue on.
> 3. Does ZFS automatically perform a periodic read/verify scan over the
> entire pool or does this need to be enabled?

See above.  :)

I run zpool scrub as a nightly cron job, on alternate pools each night.
 You can only scrub one pool at a time.

  Phil Stracchino, CDK#2     DoD#299792458     ICBM: 43.5607, -71.355
  alaric at caerllewys.net   alaric at metrocast.net   phil at co.ordinate.org
         Renaissance Man, Unix ronin, Perl hacker, Free Stater
                 It's not the years, it's the mileage.

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