10-12-2013 02:19 AM
Solved! Go to Solution.
10-30-2013 06:04 PM
It's possible that MPxIO and DMP interfere with each other. In my environment I tend to disable MPxIO for controllers/disks managed by DMP. Here is some info from Symantec about interoperability of MPxIO and DMP.
http://www.symantec.com/business/support/index?page=content&id=TECH204060
Also if you could provide the following:
1) mpathadm list lu
2) vxdmpadm getsubpaths
10-14-2013 01:10 AM
Hello,
It is clear from the errors that DMP/VxVM is trying to make IO to the device however is failing intermittently ..
Questions:
1. What version of VxVM is in use ?
2. What Storage array is in use ?
3. attach the output of # iostat -En
4. paste output of # vxdmpadm listenclosure all
5. Any analysis done from Storage / SAN switch side to know if there are any IO errors noticed ? I would expect the SAN switch logs should show some errors.
6. Any other multipathing software underneath DMP ? mpxio or powerpath ?
G
10-27-2013 07:27 AM
1. What version of VxVM is in use ?
VERSION: 5.1,REV=10.06.2009.21.48
2. What Storage array is in use ?
NETAPP
3. attach the output of # iostat -En
c0t0d0 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
4 . paste output of # vxdmpadm listenclosure all
ENCLR_NAME ENCLR_TYPE ENCLR_SNO STATUS ARRAY_TYPE LUN_COUNT
5. Any analysis done from Storage / SAN switch side to know if there are any IO errors noticed ? I would expect the SAN switch logs should show some errors.
A) Contacted SAN admin, every thing look fine.
6 . Any other multipathing software underneath DMP ? mpxio or powerpath ?
A) mpxio
10-30-2013 01:57 PM
hmm -- just my two cents:
This looks like a SCSI error while trying to write to the disk c3t60A980004431702F643F44436B446B46d0s2 (nice name). From the ASC it says it is an "Write Append Error" but I could not find the additional ASCQ Qualifier "50" for that error code.
If it is a SCSI error it seems unappropriate to disable the path since the path (to the broken (virtual) disk) is just fine.
10-30-2013 06:04 PM
It's possible that MPxIO and DMP interfere with each other. In my environment I tend to disable MPxIO for controllers/disks managed by DMP. Here is some info from Symantec about interoperability of MPxIO and DMP.
http://www.symantec.com/business/support/index?page=content&id=TECH204060
Also if you could provide the following:
1) mpathadm list lu
2) vxdmpadm getsubpaths