[lvm-devel] [PATCH] Allow incomplete mirror repairs in lvconvert --repair.

[Petr Rockai]

Hi,

the attached patch should address RHBZ 560105 and 560111. This changes
lvconvert --repair as follows:

- downconvert (like before)
- try to replace everything (like before)
- if the second step fails, try to reduce number of mirror images (one
  at a time) until only 2 remain
- if this still fails and we used to have a disk log, try 2-way + corelog

This should basically give you an LV that is closest to the original
mirror, in the space constraints of free PV areas.

Please note that this patch also changes the failure/success returns of
(manual) lvconvert --repair. As far as the initial downconversion
succeeds -- i.e. the resulting LV is not partial, we report success.

Failures to replace (part of) the failed devices are now reported as
warnings.

Yours,
   Petr.

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