XFS Question

[Andrew Mathews]

Brett I. Holcomb wrote:
> Question about XFS.  It's a journeling system and does it's check at mount. 
>  Suppose it finds a problem with the filesystem during the mount so it 
> would - I assume refuse to mount it.  How do you fix it?  fsck.xfs is a do 
> nothing routine since it assumes it's checked at mount?
> 
> 

If there's a problem with the filesystem and/or the journal can't be 
replayed (rare) it will drop you to a shell to run xfs_repair with the 
appropriate flags. You should run xfs_check first though to determine 
exactly what the problem is. In a very rare case you'll use it to 
determine if the filesystem needs dumped and restored. This could happen 
if your journal is stored externally and isn't accessible, or the log 
has grown beyond the internal default of 32k for a type 1 log and needs 
to be converted to a type 2 log using the suint suboption in mkfs.xfs. 
Essentially, as you say, fsck.xfs does nothing to the filesystem as it's 
called at a different layer than the normal xfs tools and isn't capable 
of manipulating the filesystem externally. It makes some people feel 
good though. <g>

-- 
Andrew Mathews
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