No it's not possible to set RO & RW access to the same volume at the EQL level.  But more importantly, it may not do what you want.   Each server that connects to the volume believe they own that volume, unless there's a cluster or global filesystem in place.  ESX has such a file system.  The Windows server won't participate in that cluster.  NTFS won't read VMFS volumes directly, so unless you have VCB or something similar  running to deal with that filesystem just directly attaching VEEAM won't work.  If you are using VCB then make sure that on the Windows server, automounter is turned off.  Also control access to that server very carefully.   Since it will have full access to the volume, it can reformat that VMFS volume quite easily.   I've seen it happen a number of times.  Regards,  -don 
All 4 volumes are setup as read-wirte as there are 3 vmware hosts using these volumes and all virtual machines are located there. We have just invested in Veeam B&R for backup purposes to a new ps6000 san using ISCSI.    The problem is that i have  one physical server running windows 2003 server and the veeam software and I would like to limit this physical server to an ISCSI read connection to the four volumes. Is this possible? I dont believe the MS Iscsi initiator is trustworthy to have a write connection to all the "live" volumes. Any advice would be greatly appreciated! \\TC
PS5000 with 4 thin-provisioned volumes - ISCSI access