Re: kern/57081: ZFS pool rolled back two years, all data lost since.

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

The following reply was made to PR kern/57081; it has been noted by GNATS.

From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
To: roy%marples.name@localhost
Cc: gnats-bugs%NetBSD.org@localhost
Subject: Re: kern/57081: ZFS pool rolled back two years, all data lost since.
Date: Fri, 11 Nov 2022 10:00:01 +0000

 Yikes, seems bad!
 
 1. Can you make an archive of the vdevs, and any zpool.cache file,
    onto another medium just so that you don't lose anything more in
    the event of experimentation?
 
 2. Did you update your bootloader according to src/UPDATING?
    Otherwise it won't be able to find modules from 9.99.1xx.  (This is
    necessary only for current kernels, and will not be needed for 10.)
 
 3. How are your disks partitions and file systems arranged and system
    booted?
 
 4. Can you share output from `zdb -e -l <vdev>' and from `zdb -e -h
    <pool>'?
 
 5. Are you using a zpool.cache file?  If yes, can you try moving it
    out of the way and see if that changes anything?