HP EVA P6000 Storage - Manual (Page 179)

There can be a mismatch on the Vdisk allocated size in
comparison with the host volume size shown by optimizer
(slab count and volume information). Volume information mismatch across cveva and Optimize
ReTrim used space
Based on the controller load, the efficiency of space
reclamation might vary and the reclamation not start Space reclaim is very minimal for iSCSI LUN during the
file deletion.
immediately. Reclaim of the specified space (or majority
of the specified space) may complete over a period of time
and may not be instantly.
The system event log when the threshold limit of the vdisk
is reached, When the system event log reaches the Thin Provisioning Threshold and Resource Exhaustion Test
(LOGO) Failed
threshold limit on the vdisk, the user can see an event on
the LUN utilization capacity and pool availability capacity
for LUN is restricted by either size of LUN or available
capacity in pool.
iSCSI module diagnostics and troubleshooting 179