HIT v4.8 with Firmware v9

We're currently 2 EQL groups, all running firmware v8.1.4, and a mixture of Windows Server 2008 R2 and 2012 R2 servers. We're keen to move to firmware v9.0.3 to assist with integration with some new on-site Compellant infrastructure, but I notice that HIT kit v4.9 won't install on Server 2008 R2.

If I upgrade the groups to firmware v9.0.3, can I still access the iSCSI volumes from Server 2008 R2 until we organise an upgrade of the Windows OS?