I doubt this is possible. As a rule network disks don't offer the same access to the actual disk hardware that is possible with a direct attached disk. The exception to this rule is iSCSI which I believe does present a block device to the operating system. Mind you, I'm no filesystem guru - any experts, feel free to correct me.
As a workaround, you might be able to remove the physical disk and plug it into a spare sata port in your PC and scan it that way. If it's a RAID device that probably won't work though and will probably corrupt the remaining data.
