Red Hat Bugzilla – Bug 894337
lvconvert does not support --nosync option for conversion from linear to mirror.
Last modified: 2013-08-27 17:59:58 EDT
Description of problem:
lvconvert should support --nosync option like lvcreate.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
This bug appears to have been reported against 'rawhide' during the Fedora 19 development cycle.
Changing version to '19'.
(As we did not run this process for some time, it could affect also pre-Fedora 19 development
cycle bugs. We are very sorry. It will help us with cleanup during Fedora 19 End Of Life. Thank you.)
More information and reason for this action is here:
lvconvert should not support the --nosync option. We cannot determine if there is useful information on the LV before the conversion. We must assume that there is - forcing us to sync.
When creating an LV, we know that it is unwritten; therefore it is ok to allow --nosync because anything written from then on will be consistent. Same thing can be said for extending a mirror/RAID LV - it is possible to skip the sync because no data has been written to the extension yet. This does not apply to up-converting a linear (or adding a leg to a mirror/RAID1 array either).