Re: changing xfs file system tunnings(sunit,swidth) after mkfs.xfs

[David Chinner <dgc@xxxxxxx>]

On Tue, Mar 27, 2007 at 09:04:33AM +0200, Raz Ben-Jehuda(caro) wrote:
> ahha...
> but did you ever tried to set an sunit value bigger than the one
> set during the mkfs.xfs ?

Sure - but you've got to satisfy a whole heap of alignment
and size considerations when changing sunit e.g. AGs must be
stripe unit aligned and their size must be a whole multiple
of the stripe unit.

Hence any new value generally needs to be a multiple so
that filesystem alignment remains valid.

You might want to get a recent kernel, too, as it will
tell more about the reason why the mount with the new
sunit is failing (in dmesg).

Cheers,

dave.
-- 
Dave Chinner
Principal Engineer
SGI Australian Software Group