[linux-lvm] LVM blocks discard for remove commands

[Stuart D. Gathman]

On Wed, 19 Oct 2011, Mike Snitzer wrote:

>> Does it apply for the blocks holding meta data,
>> e.g. will pvremove issue discard requests for the PV meta data ?
>
> The discards are only issued for the physical extents that were used in
> a volume's data area.  PV metadata isn't discarded, and really there
> would be little benefit to doing so.

The metadata is written over so that the PV is no longer recognized. 
I think that issuing a discard for the metadata would actually be
incorrect.

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 	      Stuart D. Gathman <stuart at bmsi.com>
     Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
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