We have a Storwize v7000 with a traditional pool without any unmap.
I understand that space will not be reclaimed automatically when data is deleted from vmware.
Consider this example:
1. We create a thin Datastore_1. Then fill it with 7 TB of VM's.
2. We migrate the VM's to another volume. Data is deleted from Datastore_1,
vmware shows zero bytes in use, but 7 TB will still be occupied on the SAN.
3. We then remove the volume from the SAN
Question: Will we get the 7 TB back in step 3?
We want to avoid manual intensive zeroing efforts by using sdelete etc.