Thanks for providing us the use of your systems; we may need to back into that later. I did look at your logs and would like to verify some things concerning your Bond. Looks like Eth 2 and 3 have different speeds sets. This can cause issues and are these NIC's the same in terms of chips sets? We noted in the release notes that when using bonding to run a stress test with different chipset as we have seen issues also the speed difference can do this as well. Check the switch or force the speed in the Console from the Console Tools menu in the Modify driver settings. Then test again. Also you might want to change the iSCSI Daemon settings from the link below as I see PDU issues from the dmesg logs. More information about PDU can be found by Google.
This happens for LUN 1,2 and 3
iscsi_trgt: data_out_start(1037) unable to find scsi task 4f1b11f 8a93
iscsi_trgt: cmnd_skip_pdu(454) 4f1b11f 1e 0 4096
Try to set the in the console the following:
Ctl-Alt-W
Select Tuning Options
Select iSCSI Daemon options
Select Target Options
Select a target
Set MaxRecvDataSegmentLength and MaxXmitDataSegmentLength to 65536.
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