I'm busy implementing the volume wiping method of the libvirt storage
pool backend and instead of writing to the whole RBD image with zeroes
I'm using rbd_discard.

Using a 4MB length I'm starting at offset 0 and work my way through the
whole RBD image.

A quick try shows me that my partition table + filesystem are gone on
the RBD image after I've run rbd_discard.

I just want to know if this is sufficient to wipe a RBD image? Or would
it be better to fully fill the image with zeroes?

Wido den Hollander
42on B.V.
Ceph trainer and consultant

Phone: +31 (0)20 700 9902
Skype: contact42on
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