[linux-lvm] strange usage stats for thin LV

Stuart D Gathman stuart at bmsi.com
Wed Oct 31 00:30:36 UTC 2012

On Oct 31, Andres Toomsalu transmitted in part:

> I'm a bit puzzled with some thin LV usage stats - hope that someone can shed a light on this.
> lvs shows that thin_backup LV is 94% used - but df  shows only 16% - where comes the difference?

df shows unused blocks in the filesystem.  lvs shows unused space in the
storage pool.  There is no relation between those whatsoever.  A
filesystem can be on any block device, whether a thin LV or an old
fashioned disk partition, or an iSCSI volume.

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