While performing a restore of a successful backup the following error is observed:
Restore task using VDDK SAN failed: "Error: 2813 - [vix_cant_write_detail] VIX can't write [xxxxxxxxxx_1.vmdk (Unknown error)"
2) You can set the quotas on a per user level providing no limit for the admins and the vRanger user.
The following link from Microsoft explains this process.