Hello Alex0X,

Here is a link to a KB that maybe of assistance. https://dell.to/2UzV6ww

On VMAX3 you must run a "free all" to de-allocate all extents:

1. Select the storage system.

2. Select Storage > Volumes.

3. Locate the volumes using the volumes filter.

4. Select one or more volumes, click more >>

5. To free all allocations associated with the volumes, regardless of whether the data is written, select Free all allocations (written and unwritten).

Where error are you receiving?

There is no unbind on VMAX3. The only prerequsites to deletion are to unmap the device from all ports and to free all allocated tracks. If you have performed these actions, I would suggest running a rediscover in Unisphere to force it to re-sync it's local database with the array. If that doesn't work then I would suggest opening an SR with Dell EMC support.

Is the any command to verify that all storage has been freed ..... something like symdev -sid 1234 verify freeing -dev xxxx

I Want to write a script which will delete device after freeing up space.

symcfg list -sid 123 -srp -tdev -devs 00060

THanks for the reply dynamox..... but while deleting large luns i hvae seen that  "symcfg -sid xxxx list -tdev -devs abcd" shows zero tracks allocated but still while deleting the tdev with symconfigure it says that tracks are still allocated....

SO is there any other way to find that  all tracks have been dellocated from tdev and all other backgroud tasks have been completed.....?