SnapDrive for UNIX does not delete LUNs with exported disk groups on Linux LVM2.
If you export a disk group (dg) on Linux LVM2 and try to delete the LUN, the delete operation fails.
Workaround
You have to use
vgimport <dgname>to import the disk group and then use the following command to delete the disk group and LUN: # snapdrive storage delete - dg <dgname> [-full]