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Re: [PATCH v2 1/5] btrfs: add command to zero out superblock

On Wednesday 09 of May 2012 19:18:07 David Sterba wrote:
> On Thu, May 03, 2012 at 03:11:45PM +0200, Hubert Kario wrote:
> > nice, didn't know about this. Such functionality would be nice to have.
> > But then I don't think that a "recreate the array if the parameters are
> > the
> > same" is actually a good idea, lots of space for error. A pair of
> > functions:
> > 
> > btrfs dev zero-superblock
> > btrfs dev restore-superblock
> As a user, I'm not sure what can I expect from the restore command. From
> where does it restore? Eg. a file?
> As a tester I have use for a temporary clearing of a superblock on a
> device, then mount it with -o degraded, work work, and then undo
> clearing. So, my idea is like
>   btrfs device zero-superblock --undo
> with the obvious sanity checks. A regular user would never need to call
> this.

Yes, that's a better idea.

Hubert Kario
QBS - Quality Business Software
02-656 Warszawa, ul. Ksawerów 30/85
tel. +48 (22) 646-61-51, 646-74-24
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