iSCSI Block LUNs and ESXi 5.5 U1 Problem

[bigsid]

Hi,

 

I'm running DSM 5.0-4493 with Nanoboot and I'm trying to present iSCSI Block LUNs to an ESXi 5.5 server. The problem I have is that when I configure the Software iSCSI HBA on ESX and perform a rescan the ESXi server hangs for about 30 minutes before eventually displaying an error in the vSphere Client which looks like this... http://puu.sh/9F25w/b92e6bcd9c.png

 

In the vmkwarning.log I see the following errors continuously between starting the rescan and the error occuring...

 

2014-06-22T13:16:22.589Z cpu1:32937)WARNING: ScsiPath: 6292: Set retry timeout for failed TaskMgmt abort for CmdSN  0x0, status Failure, path vmhba33:C0:T1:L0
2014-06-22T13:16:32.589Z cpu0:37422)WARNING: ScsiPath: 6292: Set retry timeout for failed TaskMgmt abort for CmdSN  0x0, status Failure, path vmhba33:C0:T1:L0
2014-06-22T13:16:32.589Z cpu1:35151)WARNING: iscsi_vmk: iscsivmk_TaskMgmtIssue: vmhba33:CH:0 T:1 L:0 : Task mgmt "Abort Task" with itt=0x7e (refITT=0x2e) timed out.
2014-06-22T13:16:42.592Z cpu1:35151)WARNING: iscsi_vmk: iscsivmk_TaskMgmtIssue: vmhba33:CH:0 T:1 L:0 : Task mgmt "Abort Task" with itt=0x80 (refITT=0x2d) timed out.
2014-06-22T13:16:52.592Z cpu0:35151)WARNING: iscsi_vmk: iscsivmk_TaskMgmtIssue: vmhba33:CH:0 T:1 L:0 : Task mgmt "Abort Task" with itt=0x81 (refITT=0x15) timed out.
2014-06-22T13:17:02.593Z cpu0:35151)WARNING: iscsi_vmk: iscsivmk_TaskMgmtIssue: vmhba33:CH:0 T:1 L:0 : Task mgmt "Abort Task" with itt=0x82 (refITT=0x22) timed out.

 

It works fine with ISCSI File LUNs but when I try to configure iSCSI using a Block LUN this happens. Has anyone been able to get iSCSI Block working with ESXi 5.5 and DSM 5.0?

 

Many Thanks