[Lustre-discuss] needs_recovery flag?

[Andreas Dilger]

The main issue is that tune2fs changing the superblock while the journal is not recovered means any changes will be lost. It is hard to get this 100% correct, since it is possible to set some tunable on the mounted superblock, and replaying the journal in that case would be bad. 

Running 'e2fsck /dev/xxxx' (no options) should be enough to replay the journal, without doing a full filesystem scan.

Cheers, Andreas

On 2010-08-16, at 11:20, David Noriega <tsk133 at my.utsa.edu> wrote:

> Still very new to lustre, and now I'm going over the failover part. I
> use tune2fs to set MMP, but I would get this warning about
> needs_recovery, do a journal replay or else the setting will be lost.
> With dumpe2fs I could see the needs_recovery flag was set on all of
> the OST/MDT. Reading over the recovery part, nothing really matching
> what was going on here, I elected to use e2fsck -fn then e2fsck -fp on
> all of the OST/MDT, now the needs_recovery flag is gone and I was able
> to set MMP to on.  So my question is, what did I do to get this sort
> of thing to happen? And how to avoid it?
> 
> David
> 
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