XFS Recovery

XFS Recovery

[Richard Scobie]

If the following log entry appears after mounting an XFS fs, is it safe 
to assume that whatever issue initiated the recovery has been repaired, 
or is further checking/repair required?

XFS mounting filesystem md5
Starting XFS recovery on filesystem: md5 (logdev: /dev/md0)
Ending XFS recovery on filesystem: md5 (logdev: /dev/md0)


Regards,

Richard

Re: XFS Recovery

[Dave Chinner]

On Mon, Jul 07, 2008 at 12:01:51PM +1200, Richard Scobie wrote:
> If the following log entry appears after mounting an XFS fs, is it safe  
> to assume that whatever issue initiated the recovery has been repaired,  
> or is further checking/repair required?

No.

> XFS mounting filesystem md5
> Starting XFS recovery on filesystem: md5 (logdev: /dev/md0)
> Ending XFS recovery on filesystem: md5 (logdev: /dev/md0)

That's normal output when mounting an XFS filesystem - if
you see more than this then there might be problems...

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

Re: XFS Recovery

[Richard Scobie]

Dave Chinner wrote:

>>XFS mounting filesystem md5
>>Starting XFS recovery on filesystem: md5 (logdev: /dev/md0)
>>Ending XFS recovery on filesystem: md5 (logdev: /dev/md0)
> 
> 
> That's normal output when mounting an XFS filesystem - if
> you see more than this then there might be problems...

Thanks Dave,

I was more used to seeing:

XFS mounting filesystem md5
Ending clean XFS mount for filesystem: md5

Maybe the message has changed with later kernels.

In any case, it sounds like I have no issues.

Regards,

Richard

Re: XFS Recovery

[Timothy Shimmin]

Dave Chinner wrote:
> On Mon, Jul 07, 2008 at 12:01:51PM +1200, Richard Scobie wrote:
>> If the following log entry appears after mounting an XFS fs, is it safe  
>> to assume that whatever issue initiated the recovery has been repaired,  
>> or is further checking/repair required?
> 
> No.
> 
>> XFS mounting filesystem md5
>> Starting XFS recovery on filesystem: md5 (logdev: /dev/md0)
>> Ending XFS recovery on filesystem: md5 (logdev: /dev/md0)
> 
> That's normal output when mounting an XFS filesystem - if
> you see more than this then there might be problems...
> 
Hmmm....I don't know if I would describe that as "normal"
unless I am misunderstanding Dave here.
There has been some recovery happening indicating that there
wasn't a clean unmount (it didn't find an unmount record in the log).
But recovery should have replayed the
outstanding metadata to a time point in the near past
and so no repair should be necessary (we have qa tests which do the
test anyway and check that there are no complaints).

--Tim

Re: XFS Recovery

[Mark]

--- On Sun, 7/6/08, Timothy Shimmin <tes@sgi.com> wrote:
> >> XFS mounting filesystem md5
> >> Starting XFS recovery on filesystem: md5 (logdev:
> /dev/md0)
> >> Ending XFS recovery on filesystem: md5 (logdev:
> /dev/md0)
> > 
> > That's normal output when mounting an XFS
> filesystem - if
> > you see more than this then there might be problems...
> > 
> Hmmm....I don't know if I would describe that as
> "normal"
> unless I am misunderstanding Dave here.
> There has been some recovery happening indicating that
> there
> wasn't a clean unmount (it didn't find an unmount
> record in the log).
> But recovery should have replayed the
> outstanding metadata to a time point in the near past
> and so no repair should be necessary (we have qa tests
> which do the
> test anyway and check that there are no complaints).

Maybe not "normal," but at least "acceptable"?

If it's a regular occurrence, it might be worth looking into.
If it was a one-off, with no further complaints, I'd ignore it.

-- 
Mark

"What better place to find oneself than
 on the streets of one's home village?"
      --Capt. Jean-Luc Picard, "Family"

Re: XFS Recovery

[Dave Chinner]

On Mon, Jul 07, 2008 at 11:30:15AM +1000, Timothy Shimmin wrote:
> Dave Chinner wrote:
> > On Mon, Jul 07, 2008 at 12:01:51PM +1200, Richard Scobie wrote:
> >> If the following log entry appears after mounting an XFS fs, is it safe  
> >> to assume that whatever issue initiated the recovery has been repaired,  
> >> or is further checking/repair required?
> > 
> > No.
> > 
> >> XFS mounting filesystem md5
> >> Starting XFS recovery on filesystem: md5 (logdev: /dev/md0)
> >> Ending XFS recovery on filesystem: md5 (logdev: /dev/md0)
> > 
> > That's normal output when mounting an XFS filesystem - if
> > you see more than this then there might be problems...
> > 
> Hmmm....I don't know if I would describe that as "normal"
> unless I am misunderstanding Dave here.

Normal as in "everything is OK - there's no need to worry".
Recovery at mount time happens quite frequently for a variety of
reasons - it's not a sign that there's something wrong as such....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com