I'm aware that you can't mount a single LUN to two read/write NTFS iscsi volumes without massive issues unless you are using clustered servers. However, I'm curious about mounting 1 iscsi lun read/write on one server (say, a database server) and the same iscsi lun as read-only on another server (say, backup server) to facilitate easier backups as a interim solution.
Now, this is only for the database .bak files from SQL Server 2008 - the reason being I'm having other network issues that can't get resolved yet (network team is different side of the company, we don't have access to fix our issue) causing backups to take 20-25hrs. However, since they both have connections to the same iscsi SAN, I figured this would make things better.
I haven't tested this on my production system yet but haven't seemed to have problems running a similar test on my LAB - however with file-sizes much smaller (2gb compared to 800gb), I wanted to see if anyone had experiences in doing this and if it'll work or not.
Edit: Just for reference, both servers are Server 2008 R2 (SQL server is Ent, Backup is Std) connected to an HP P4500 (Lefthand) iscsi SAN.