Cldg switch command hangs for long time

Question

Hello Experts ,
We have renamed the veritas volumes vol1 and vol2 of disk group "dg", which is under cluster control.
The renaming of volumes are successfully completed and modification updated in Cluster CCR (cldg sync dg) and volumes are mounted successfully in node002.
We have switch over the disk group "dg" from node002 to node004. The disk group switch over to the node node004 successfully and able to mount the volumes.
Again, we have switch over the disk group "dg" from node004 to node002, but the switch command is not successful and hanged for long time. When we check the /var/adm/messages in node002, the below messages appeared
Oct 22 11:49:39 node002 scsi: [ID 107833 kern.warning] WARNING: /pci@0,600000/pci@0/scsi@1 (mpt0):
Oct 22 11:49:39 node002 Disconnected command timeout for Target 0
Oct 22 11:50:49 node002 scsi: [ID 107833 kern.warning] WARNING: /pci@0,600000/pci@0/scsi@1 (mpt0):
Action plan followed for renaming the volume:*
node002:/var/tmp/bak# umount /local/mqm/log/mq_log
node002:/var/tmp/bak# umount /local/mqm/qmgrs/mq_qmgr
node002:/var/tmp/bak# vxvol -g dg stop vol1
node002:/var/tmp/bak# vxvol -g dg stop vol2
node002:/var/tmp/bak# vxedit -g dg rename vol1 vol1_log
node002:/var/tmp/bak# vxedit -g dg rename vol2 vol2_qmgf
node002:/var/tmp/bak# vxvol -g dg start vol1_log
node002:/var/tmp/bak# vxvol -g dg start vol2_qmgf
node002:/var/tmp/bak# cldg sync dg
Please advice on this error and how to resolve this.
Regards,
R. Rajesh Kannan

Answer 1

But what is device mtp0? It doesn't sound like a disk name. It is having SCSI problems. I don't know if these messages are relevant though.
I don't use VxVM as a rule, but your procedure seems reasonable to me.
Tim
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