Xenserver LVM over iSCSI

Trying to reclaim space from that VM you deleted several months ago?

This is a known issue with Xenserver and iSCSI when snapshots are used.

The short answer is that if you allow your SR to fill up too much, the automatic coalesce leaf operations performed by XS will not be able to be performed as a certain amount of space is required for this function to reclaim space.

The basic rule is that there must be Double the VM size of free space on the SR available for the coalesce function to work.

So if you delete a 100GB VM, you MUST have at least 200GB of free available space on the SR.

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