[Lustre-discuss] when reformat doesn't mean reformat
Andreas Dilger
adilger at sun.com
Tue Feb 3 01:25:04 PST 2009
On Feb 02, 2009 14:11 -0800, Jim Harm wrote:
> I believe it would be better to have mkfs.lustre with the option
> "--reformat" do a reformat instead of saving configuration and
> rebuilding the OST and then restoring the old, obsolete configuration
> that I was trying to change.
>
> If you want to reformat an OST and keep the configuration, it should
> be some other option. This "--reformat" retains the OST name and
> mount options and last_rcvd and volume name.
> That does not seem to me to be a "reformat".
>
> Instead, I have to (after the "--reformat"), tunefs.lustre with
> writeconf and erase_params (repeating the options that I thought
> would be written with the mkfs.lustre) and then I have to go in
> and tune.ldiskfs the volume name, too.
>
> It appears the only way to REALLY reformat is to dd 0s into first 10k
> blocks, or so. then redo the mkfs.lustre with desired options.
>
> sigh; maybe i missed it in the manual or previous email, sorry, if
> that's the case.
Jim,
I agree that this does appear to be confusing behaviour. Can you
please file a bug.
Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.
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