Re: [RESOLVED] [gentoo-user] zfs repair needed (due to fingers being faster than brain)

[John Blinka <john.blinka@gmail.com>]

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To all who replied to my distress signal,

The repair turned out to be pretty painless.  In two ways:

First, getting quality advice from all of you sans the roasting I deserved
;), and

Second, gdisk fixed the gpt header and partition table easily (details
below).  After that, I rebooted, zfs recognized the disk, and then it
started a resilver automatically.  It was done a few minutes later, and now
everything’s back to normal.

Gdisk noted that both the main gpt header and main partition table were
damaged, but the backups were ok.  I bypassed gdisk’s offer to use either
the current gpt or to create a blank gpt, because I didn’t understand
exactly what “current” or “blank” meant.

Instead, I invoked the recovery & transformation menu with “r”.  Then I
used “b” to rebuild the damaged main gpt header with the good backup,
followed by “c” to restore the partition table from the good backup.  I
then printed the partition table.  It looked exactly like the partition
tables on the other disks of the same make and model in the zfs pool
(modulo what looked like a unique zfs partition name).  That made me
comfortable, so I wrote the changes to disk, rebooted, and found everything
back to normal after the resilver.

Appreciate all the help.  Thanks!

John

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