Why do I need Read-Write Permission for vRanger iSCSI Volumes? (4047631)

The main reason is that mostly seems for safety reasons you are advised to configure the SAN this way. This configuration helps to avoid possible vmfs corruption, and prevent mistaken/accidental formating of the SAN(i.e. automount popup request to format the drive). This is also the reason disabling automount is recommended.

Disable thje automount on the vRanger machine

1. From start menu, select run and enter diskpart
2. Run the automount disable command to disable the automatic drive letter assignment
3. Run the automount scrub command to clean any registry entries pertaining to previously mounted volumes

Please follow the deployment guide and the section listed as:

Configuring vRanger for SAN Backups

VMWare KB's:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1035096
"For a Windows Server 2008 proxy, set SAN policy to onlineAll. Set SAN disk to read-only except for restore."

Here are some other links that may provide additional information:
http://pubs.vmware.com/vsphere-50/topic/com.vmware.ICbase/PDF/vsphere-esxi-vcenter-server-50-storage-guide.pdf

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1013109