Error: The SR Backend failed to complete the operation

I keep randomly getting this error message when performing almost any operation requiring accessing my shared storage (creating VMs, starting VMs, installing hosts, etc). The SR is set up to connect via iSCSI to a volume on my NexSAN SATABeast. Anyone have any clues how to resolve this?
xe sr-list params=all excerpt:
uuid ( RO)                    : 0262540f-0d05-b31f-595f-a4d72ff19f17
              name-label ( RW): iSCSI virtual disk storage
        name-description ( RW): iSCSI SR [172.16.2.41 (iqn.1999-02.com.nexsan:p0:satabeast:01611238)]
                    host ( RO): <shared>
      allowed-operations (SRO): forget; VDI.create; VDI.snapshot; plug; update; destroy; VDI.destroy; scan; VDI.clone; VDI.resize; unplug
      current-operations (SRO): 
                    VDIs (SRO): ccd8c8cb-0ce5-4307-ab16-cc5922f9dde7; e427cbaf-6e80-414c-bb3f-f9de0fbaf69f; 302b475c-467b-4023-ba49-7c00d4d99463
                    PBDs (SRO): 7c8a0994-98c3-258b-1755-134600124879; 36504d0f-a812-8d05-9d25-53ce76356f0d
      virtual-allocation ( RO): 134502940672
    physical-utilisation ( RO): 343253450752
           physical-size ( RO): 1023988989952
                    type ( RO): lvmoiscsi
            content-type ( RO): 
                  shared ( RW): true
            other-config (MRW): auto-scan: false
               sm-config (MRO): allocation: thick; use_vhd: true; multipathable: true; devserial: scsi-36000402001fc12386369373200000000
                   blobs ( RO):

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rpasseroAsked:
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rpasseroConnect With a Mentor Author Commented:
The problem was related to DNS/routing settings on one of my hosts...which is why the error only appeared sometimes, when that particular server was attempting to do the provisioning.
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