Hi Viktor
You have mentiioned in your original post that you have installed latest HBA firmware and drivers. Did you also upgrade Microsoft Storport driver?
Please confirm your SFW version and patch level as well as O/S patch level (also 32-bit or x64?)
If multiple paths: Are you using MPIO? Which DSM modules?
Also double-check Hardware Compatibility list (Here's link to SFW 5.1 HCL):
ftp://exftpp.symantec.com/pub/support/products/Storage_Foundation_for_Windows/302144.pdf
The DS4000 series is not listed under Note 3:
Note 3: Enabling SCSI-3 PGR on Your Array to Support Active/Active DMP DSM in a Cluster (MSCS/VCS)
For storage array type:
- IBM System Storage™ DS8000 Series
- IBM System Storage™ DS3400
- IBM System Storage™ SAN Volume Controller
Use:
- EnableSupportSCSI3IBMDS.reg to enable SCSI-3 PGR
- DisableSupportSCSI3IBMDS.reg to disable SCSI-3 PGR
IBM DS4000 series is listed as AP/C on page 1 of HCL.
On page 7 under Note 17 it mentions the following:
Note 17: IMPORTANT: These arrays require additional configuration steps in order to work properly with Veritas Storage Foundation for Windows. Before attempting to use any of these arrays with Veritas Storage Foundation for Windows DMP software, please contact the array hardware manufacturer for additional configuration instructions and updates. Several special settings must be enabled on these arrays to allow compatibility with DMP, including Auto Volume Transfer (AVT), also referred to as Auto Logical Drive Transfer (ADT). Specific firmware levels from the manufacturer for these arrays may also be required.