VMware backups failing with status 23 "Error opening the snapshot disks using given transport mode".
Problem
VMware backups failing with status 23 "Error opening the snapshot disks using given transport mode".
Error Message
By examining the logs, bpbkar shows the following:
9:31:05.538 AM: [8352.6000] <2> tar_base::V_vTarMsgW: INF - VxMS Error message 1 = Error opening snapshot disk(s) using given transport mode(s)
message 2 = Error opening snapshot disk(s) using given transport mode(s)
9:31:05.541 AM: [8352.6000] <4> tar_base::V_vTarMsgW: INF - tar message received from vxms_error_handler
..
9:31:05.701 AM: [8352.6000] <2> tar_base::V_vTarMsgW: ERR - Error opening the snapshot disks using given transport mode: Status 23.
VxMs log shows:
07/03/2013 09:31:04.0781 : g_vdInterfaceLogger:.\libvix.cpp:1683 <INFO> : diskLibPlugin: 2013-07-03T09:31:04.781-07:00 [06000 trivia 'Default'] Attempting to open LVID:50a30156-cb93d8f8-d1b7-842b2b553950/50a300d3-f249fee3-b62c-842b2b553950/1.
07/03/2013 09:31:04.0781 : g_vdInterfaceLogger:.\libvix.cpp:1683 <INFO> : diskLibPlugin: 2013-07-03T09:31:04.781-07:00 [06000 error 'Default'] No path to device LVID:50a30156-cb93d8f8-d1b7-842b2b553950/50a300d3-f249fee3-b62c-842b2b553950/1 found.
07/03/2013 09:31:04.0781 : g_vdInterfaceLogger:.\libvix.cpp:1683 <INFO> : diskLibPlugin: 2013-07-03T09:31:04.781-07:00 [06000 error 'Default'] Failed to open new LUN LVID:50a30156-cb93d8f8-d1b7-842b2b553950/50a300d3-f249fee3-b62c-842b2b553950/1.
07/03/2013 09:31:05.0438 : g_vdInterfaceLogger:.\libvix.cpp:1683 <INFO> : diskLibPlugin: 2013-07-03T09:31:05.438-07:00 [06000 error 'BlockList'] Other error encountered: vim.fault.CannotAccessFile
Cause
The LUN hosting the datastore is not properly zoned to the VM backup host.
There is also a known VMware issue that could cause this error when trying to access a thin unallocated disk which is not a lun.
Solution
Two possible issues:
1. Zoning issue between the VMware Backup Host and the Datastores/LUNs.
2. Address the thin unallocated disk that is not a lun. (https://kb.vmware.com/kb/2145341)
Related Articles:
How to check if a VMware datastore is presented on SAN to a Windows NetBackup host
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