Hi,
PFB the kernal logs, effected lun is 9.
2013-03-20T09:23:10.424Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_getTargetPortInfo:79:Could not find relative target port ID for path "vmhba6:C0:T3:L9" - Not found (19588710
2013-03-20T09:23:10.424Z cpu6:9035)WARNING: NMP: nmp_SatpClaimPath:2093:SATP "VMW_SATP_ALUA" could not add path "vmhba6:C0:T3:L9" for device "Unregistered Device". Error Not fo
2013-03-20T09:23:10.424Z cpu6:9035)WARNING: ScsiPath: 4550: Plugin 'NMP' had an error (Not found) while claiming path 'vmhba6:C0:T3:L9'.Skipping the path.
2013-03-20T09:23:10.424Z cpu6:9035)ScsiClaimrule: 1329: Plugin NMP specified by claimrule 65535 was not able to claim path vmhba6:C0:T3:L9. Busy
2013-03-20T09:23:10.424Z cpu6:9035)ScsiClaimrule: 1554: Error claiming path vmhba6:C0:T3:L9. Busy.
2013-03-20T09:23:10.425Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_determineStatus:559:VMW_SATP_ALUA:Unknown Check condition 0/2 0x5 0x24 0x0.
2013-03-20T09:23:10.425Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_issueCommandOnPath:676:Path "vmhba5:C0:T0:L9" determined to be in unexpected NOT READY state when probed.
2013-03-20T09:23:10.425Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_determineStatus:559:VMW_SATP_ALUA:Unknown Check condition 0/2 0x5 0x24 0x0.
2013-03-20T09:23:10.425Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_issueCommandOnPath:676:Path "vmhba6:C0:T0:L9" determined to be in unexpected NOT READY state when probed.
2013-03-20T09:23:10.426Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_determineStatus:559:VMW_SATP_ALUA:Unknown Check condition 0/2 0x5 0x24 0x0.
2013-03-20T09:23:10.426Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_issueCommandOnPath:676:Path "vmhba5:C0:T2:L9" determined to be in unexpected NOT READY state when probed.
2013-03-20T09:23:10.427Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_determineStatus:559:VMW_SATP_ALUA:Unknown Check condition 0/2 0x5 0x24 0x0.
2013-03-20T09:23:10.427Z cpu6:9035)WARNING: VMW_SATP_ALUA: satp_alua_issueCommandOnPath:676:Path "vmhba6:C0:T1:L9" determined to be in unexpected NOT READY state when probed.
2013-03-20T09:23:10.427Z cpu6:9035)WARNING: vmw_psp_rr: psp_rrSelectPathToActivate:972:Could not select path for device "Unregistered Device".
2013-03-20T09:23:10.427Z cpu6:9035)WARNING: NMP: nmpPathClaimEnd:1195:Device, seen through path vmhba6:C0:T1:L9 is not registered (no active paths)
2013-03-20T09:23:10.504Z cpu6:9035)Vol3: 647: Couldn't read volume header from control: Invalid handle
2013-03-20T09:23:10.504Z cpu6:9035)FSS: 4333: No FS driver claimed device 'control': Not supported
2013-03-20T09:23:10.636Z cpu6:9035)VC: 1449: Device rescan time 37 msec (total number of devices 15)
2013-03-20T09:23:10.636Z cpu6:9035)VC: 1452: Filesystem probe time 167 msec (devices probed 14 of 15)
2013-03-20T09:23:16.179Z cpu5:11141)Vol3: 647: Couldn't read volume header from control: Invalid handle
2013-03-20T09:23:16.179Z cpu5:11141)FSS: 4333: No FS driver claimed device 'control': Not supported
2013-03-20T09:23:16.328Z cpu5:11141)VC: 1449: Device rescan time 65 msec (total number of devices 15)
2013-03-20T09:23:16.328Z cpu5:11141)VC: 1452: Filesystem probe time 289 msec (devices probed 14 of 15)