since you mentioned that you configured a file system i assume you are connecting to iSCSI using Celerra datamovers. In windows iSCSI initiator you specify IP address of your iSCSI target (Celerra).  You also need to mask your iSCSI LUN to IQN name of your server ( can see that name under general properties of iSCSI initiator). Once that is done you will need to login your initiator to the target, in iSCSI initiator select Targets tab, hit refresh to make sure you see the target, highlight it and select Log On.
 I have a non-production Clariion CX500 that I am using to test an iSCSI connnection with Windows Server 2008 R2. I have no iSCSI experience and very little experience with Celerras/Clariions. I used the Wizard on the remote interface to create a file system, iSCSI target and iSCSI Lun. I can log onto a Windows 2008 R2 server and connect to the IP of the Clariion through the iSCSI initiator. When I go to view the disk under dusk management I don't see disk space I just added. I am sure there is something that I missed in the configuration somewhere. Anyone have any ideas or suggestions?
Clariion iSCSI with Server 2008 R2