Degraded Physical Disk Channel

I hope someone can help me with this problem.  Our Dell Powervault disk storage manager has indicated a problem with our SANS array, and this is one it says I myself cannot fix.  Specifically it states:

• You must contact your technical support representative to correct this failure. DO NOT attempt to fix this problem yourself.

We are running a Dell PowerVault MD3000i along with two additional MD1000 units.

Currently we do not have a Dell support contract and I am hoping there is some way to correct this problem.  The recovery guru identifies the issue as:

"A physical disk channel status was set to Degraded either because of excessive I/O errors, or at the instruction of a technical support representative for diagnostic or other support reasons. It is important to correct this failure as soon as possible. The physical disks are still operational, but a level of path redundancy has been lost. If the other channel to the physical disks fails, then the physical disks themselves may fail. The Recovery Guru Details area provides specific information you will need as you follow the Recovery Steps."

There is no Loss of Path Redundancy indicated, the details in the guru are:

Storage array:  SAN-1
  Degraded physical disk channels:  0,  1

Is there anything I can do to further investigate this problem, or to correct it?  I am trying to determine where it is seeing the "excessive I/O errors" to narrow down my possible causes.  Any help is greatly appreciated.  Until this point the storage manager has been a great tool and has always provided me a clear identification of the problem and steps to correct.

Thanks in advance for any help or direction.

Ivan