VXVM question

[Subhas R. Reddy]

vxvm error "not a valid dmp node disk access name"

Has any one any idea what this is due to? We are working on a new cluster installation on two superdomes.

Thanks,
Subhas

[Hemanth Gurunath Basrur]

Hello Subhas,

Please refer to the VxVM Admin Guide for info.

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B7961-90018/B7961-90018_top.html&con=/hpux/onlinedocs/B7961-90018/00/01/126-con.html&toc=/hpux/onlinedocs/B7961-90018/00/01/126-toc.html&searchterms=a%7cvalid%7cdmp%7cnode%7cnot&queryid=20040110-000012

I have picked the foll. info from VxVM 3.5 Release Notes:

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/5187-1373/5187-1373_top.html&con=/hpux/onlinedocs/5187-1373/00/00/11-con.html&toc=/hpux/onlinedocs/5187-1373/00/00/11-toc.html&searchterms=a%7cvalid%7cdmp%7cnode%7cdisk%7caccess%7cname%7cnot&queryid=20040109-235343

VxVM DMP Issues

VxVM DMP Lists Disabled Paths That Have Been Reused

Problem: When one of multiple paths or cables to a disk array is disconnected, fails, or is swapped with another path, and then that same path or cable is reconnected or replaced, it is possible that HP-UX will recognize the recovered path as a new path, not as the same path that has simply recovered. In this case, DMP will list twice as many paths: the "new" ones in the ENABLED state and the "old" ones (that is, from before the paths were swapped, removed or replaced) in the DISABLED state. I/O continues to be routed correctly.

Workaround: None necessary. VxVM DMP will not automatically clean up the paths that are no longer in use, or that are in the DISABLED state. When the host is rebooted, the DMP database will be rebuilt without the DISABLED path definitions.

VxVM 3.5 Does not Support DMP Disabling The disabling of DMP is not supported in VxVM 3.2 and VxVM 3.5. The utilities that existed prior to VxVM 3.2 to disable DMP (vxdmpdis) and enable DMP (vxdmpen) are no longer provided.

Btw, which version of VxVM are you using?

Regards,
Hemanth

[PVR]

Can u give more information like when it is giving this error.

If it is specifying any disk access record, check with;
#vxdisk list cxtxdx. This should show DMP paths.

Check whether all controllers are enabled or not

#vxdmpadm listctlr all. This will show all controllers.
Check wthether vxdisk list goiving any error or not??

Check the manpage of vxdmpadm..

[Subhas R. Reddy]

Hemanth,

We are using vxvm 3.51. We initially used 3.5 and ran into a lot of DMP related problems and Veritas said that we need to go to 3.51. But we still ran into a lot of problems. We were on call with HP for almost 4 hours. I am still foggy about what caused the problem and how we fixed it. The only consolation is that we now know that the problem can be fixed with 3.51 whereas 3.5 just refused to work with HP systems and XP-1024 storage combination. The Veritas guys seem to be conversant with Sun system + EMC storage but not HP System + XP-1024 storage.

Thanks,
Subhas