Dell PowerVault NX3100 - Manual (Page 33)

Target Details
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3 To delete a virtual disk, choose the Devices option, right-click on the
virtual disk from middle pane, and select Delete Virtual Disk.
NOTE:
Step 3 only deletes the association in the iSCSI Target software, but
does not clear the disk space in the volume. You must manually browse to the
volume and delete the .vhd file to clear the disk space.
4 To remove an iSNS server entry, right-click Microsoft iSCSI Software
Target
→ select Properties→ iSNS tab → Remove the DNS name or IP
address entry.