On Thu, 8 Mar 2012, Phillip Susi wrote:

On 3/1/2012 9:54 AM, Lukas Czerner wrote:

quoted

Well, it is not default right ? So the user should better know what is
he doing. Moreover it is not like it is end of the world when we do not
provide that option, since SSD's will handle over provisioning to some
extent even without slowdown, and as for thin-provisioned devices you
should know why you're overriding defaults and what it means for you.

Anyway, if people really want this another option to discard all the
block groups including those UNINIT ones, I guess I can not resist that
:). '-E discard_all' maybe ?

I think the option is a little more generic than discard.  The uninit groups
are not discarded because they are not checked in the first place.  A bad
group descriptor checksum will force the group to be checked, and thus
discarded as well.  I think what is needed is an option to trigger the same
thing: force all groups to be checked, even if they are uninit and have good
descriptor checksums.  Maybe -E thorough?

Why would we try to check UNINIT groups with valid descriptor checksums
? I think that this problem will be solved with BLOCK_DISCARDED flag as
we discussed with Ted in another thread. No need to have yet another
option so it is win-win :)

Thanks!
-Lukas