Hi,
Based on the vmkernel logs, this is very generic problem it is talking about. As per this logs "LUN" , is in check condition.
Here is KB http://kb.vmware.com/kb/289902 which explain this.
2013-01-22T12:40:44.367Z cpu12:2060)ScsiDeviceIO: 2322: Cmd(0x4124413f5f40) 0x12, CmdSN 0x25daa from world 0 to dev "naa.600508e0000000009c95df5f5a836000" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x24 0x0.
2013-01-22T12:45:44.366Z cpu10:2058)ScsiDeviceIO: 2322: Cmd(0x41244038c680) 0x12, CmdSN 0x25dc6 from world 0 to dev "naa.600508e0000000009c95df5f5a836000" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x24 0x0.
2013-01-22T12:50:44.365Z cpu12:2060)ScsiDeviceIO: 2322: Cmd(0x41244038c680) 0x12, CmdSN 0x25dc8 from world 0 to dev "naa.600508e0000000009c95df5f5a836000" failed H:0x0 D:0x2 P:0x0 Valid sense data: 0x5 0x24 0x0.
However I would suggest to raise support Request with VMware support Team, so that we can analyse whole vm-support bundle and give recommendation based it.
I would like to know, after making what changes you started seeing this problem.
Regards
Mohammed