[OpenIndiana-discuss] zpool errors a bit confusing

[oi.mail-list at gmx.com]

On 4/4/2014 3:21 PM, Harry Putnam wrote:
> I don't have enough experience to know if the `zpool status -v' errors
> I'm seeing are serious or what.  So, went to the recommended site:
> illumos.org/msg/ZFS-800-8A
>
> Which left me with the impression that I must be seeing something
> unusual.
>
> It appears from the `zpool status' output on that site that the problem
> referred to is actually in a file[s], whereas what I'm seeing appears to
> be in directories.  zfs filesytem directories with [...]/.zfs.
>
> I will post further along the actual `zpool status -v' output for the
> two problem pools but first I wanted to try to explain a bit of what
> is going on.... it may be way off base compared to what experienced
> folks do.
>
> I notice that one of the cited directories in each pool that is
> mentioned as a problem, is the mountpoint of the poolname.  I did do
> something that may be ill-advised before noticing the errors. And may
> even be the cause of them.
>
> The pools I created all seemed to automatically find mountpoints on
> '/'.  I guess that is default behavior.
>
> That is, if I create a pool: p/some/dir.
> I then see /p  appear on '/'.
>
> But, since I also wanted some of the first portion of the system like:
> p1/HERE to be mounted on '/HERE' (That is, on '/') too. And as you can
> surmise, with very much of that and '/' will be really cluttered.
>
> OK, I decided I would rather have the pools all have their mountpoints
> in one directory on '/' instead of having a pile of pools on '/'
>
> so instead of /p1 /p2 /p3 /p4 [...] I would have
>
> /p/p1 /p/p2 [...]
>   
> So '/p' would be the only point on '/' and all pools would be under /p
>
> Maybe that is a dingy or even harmful thing to do.  I just set the
> mountpoint of each pool to be mounted under /p.
>
> If that is a bad thing, then it may be the cause of these messages.
> However it only appears on two out of four pools and all of them have
> there mountpoints under /p/
>
> Below is the output from two pools (p3 p4) that show the problem.  I
> snipped away the body of the `zpool' output in the second (p4) since
> it was the same. I did include the actual directories mentioned in p4.
>
> `zpool status -v pool' shows only directories as the 'corrupted' data.
> Each shows the initial directory of that zfs system but p4 also shows
> the terminal directory of that zfs system.
>
> Further, the zpool output speaks of replacing files, but the only data
> mentioned are directories..... so does it mean the entire directory
> content?
>
> The `zpool status -v' output is followed by a few brief questions.
> -------        ---------       ---=---       ---------      --------
>
> zpool status -v p3
>    pool: p3
>   state: ONLINE
> status: One or more devices has experienced an error resulting in data
>          corruption.  Applications may be affected.
> action: Restore the file in question if possible.  Otherwise restore the
>          entire pool from backup.
>     see: http://illumos.org/msg/ZFS-8000-8A
>    scan: none requested
> config:
>
>          NAME        STATE     READ WRITE CKSUM
>          p3          ONLINE       0     0     0
>            mirror-0  ONLINE       0     0     0
>              c4t6d0  ONLINE       0     0     0
>              c4t7d0  ONLINE       0     0     0
>
> errors: Permanent errors have been detected in the following files:
>
>          /p/p3/
> -------        ---------       ---=---       ---------      --------
> pool p4 has same output except disks and list of effected files
> -------        ---------       ---=---       ---------      --------
>
> zpool status -v p4
>
> [...]
>
>     NAME        STATE     READ WRITE CKSUM
>     p4          ONLINE       0     0     0
>       mirror-0  ONLINE       0     0     0
>         c4t8d0  ONLINE       0     0     0
>         c4t9d0  ONLINE       0     0     0
>
> errors: Permanent errors have been detected in the following files:
>
>        /p/p4/
>        /eBk/eImgMus/
> -------        ---------       ---=---       ---------      --------
>
>
> NOTES:
> In both cases there are no files in /p/p3 or /p/p4.
>
> There are 23034 music and photo files/directories in p4/eBk/eImgMus/
>
> What do I need to do to get to the bottom of the problem?  It is
> really likely that all the files under p4/eBk/eImgMus/ are corrupted?
>
>
> _______________________________________________
> OpenIndiana-discuss mailing list
> OpenIndiana-discuss at openindiana.org
> http://openindiana.org/mailman/listinfo/openindiana-discuss
      It is a critical error  like the "see" notes states and most 
likely, it needs to be re-created and  restore from backup.
     As a suggestion, never trust saving that many files on a 
developmental OS.