XFS corruption with failover

[Felix Blyakher]

On Aug 13, 2009, at 7:31 PM, Eric Sandeen wrote:

>> This is an IO error. Is the block device (/dev/sde) accessible
>> from the server #2 OK? Can you dd from that device?
>
> Are you sure?

No, I'm not. Replied first without looking at the code ^)

>
>
>                if (ohead->oh_clientid != XFS_TRANSACTION &&
>                    ohead->oh_clientid != XFS_LOG) {
>                        xlog_warn(
>                "XFS: xlog_recover_process_data: bad clientid");
>                        ASSERT(0);
>                        return (XFS_ERROR(EIO));
>                }
>
> so it does say EIO but that seems to me to be the wrong error; loks  
> more
> like a bad log to me.

Agree. It does look like corrupted (incomplete) log.

>
>
> It does make me wonder if there's any sort of per-initiator caching on
> the iscsi target or something.  </handwave>

Yep, somewhere piece of log left out in a cache, and wasn't flushed
to disk.

Felix