vmmodify ERROR (myvm) Incorrect backing device type - hpux

vmmodify: ERROR (myvm) : Incorrect backing device type - hpux

If we get below error while adding disk to HPVM guest machine:

Here
myvm = HPVM Host machine
vmguest = HPVM guest machine
disk to be added = /dev/rdisk/disk14204

myvm:/dev/disk] hpvmmodify -P vmguest -a disk:avio_stor::disk:/dev/rdisk/disk14204
hpvmmodify: ERROR (vmguest): Incorrect backing device type.
hpvmmodify: Unable to create device disk:avio_stor::disk:/dev/rdisk/disk14204.
hpvmmodify: Unable to modify the guest.

Solution:

Check the device files for the disk:

myvm:/dev/disk] ll /dev/disk/disk14204
brw-r-----   1 bin        sys          1 0x00011f Oct 13 15:57 /dev/disk/disk14204
myvm:/dev/disk]
myvm:/dev/disk] ll /dev/rdisk/disk14204
crw-r-----   1 bin        sys         13 0x00011f Oct 13 15:57 /dev/rdisk/disk14204
myvm:/dev/disk]

myvm:/dev/disk] ll /dev/pt/pt_disk14204
crw-r-----   1 bin        sys         12 0x00011c Sep 18 10:14 /dev/pt/pt_disk14204
myvm:/dev/disk]


See the there is difference between the device files so  it is giving error while adding the particular disk to VM guest.

Remove the device file and recreate it by below commands:

myvm:/dev/disk] rm /dev/pt/pt_disk14204


myvm:/dev/disk] rm /var/opt/hpvm/common/hpvm_devinit


myvm:/dev/disk] hpvmdevmgmt -I -V

hpvmdevmgmt: VERBOSE (host): Device /etc already exists in hpvm device database.
hpvmdevmgmt: VERBOSE (host): Device /stand already exists in hpvm device database.
myvm:/dev/disk]

myvm:/dev/disk] ll /dev/pt/pt_disk14204
crw-r-----   1 bin        sys         12 0x00011f Oct 15 12:32 /dev/pt/pt_disk14204

myvm:/dev/disk] hpvmmodify -P vmguest -a disk:avio_stor::disk:/dev/rdisk/disk14204

myvm:/dev/disk] hpvmdevinfo -P vmguest |grep 14204
vmguest                   disk            [0,0,103]               disk                    /dev/rdisk/disk14204    /dev/rdsk/c2t11d4
myvm:/dev/disk]


-----------------------------------------------------------------------

hpvm commands log file:

myvm:/] tail -f /var/opt/hpvm/common/command.log
10/15/14 12:11:12|SUMMARY|CLI|kiranj|hpvmdevmgmt -l all
10/15/14 12:11:31|SUMMARY|CLI|kiranj|hpvmstatus -v -P vmguest
10/15/14 12:11:38|SUMMARY|CLI|kiranj|hpvmstatus -v -P vmguest
10/15/14 12:22:21|SUMMARY|CLI|kiranj|hpvmdevmgmt -I -V
10/15/14 12:25:57|SUMMARY|CLI|kiranj|hpvmstatus
---------------------------------------------------------------------------

myvm:/] tail -f /var/opt/hpvm/common/hpvm_mon_log

Thanks...

Kiran Babu Jadhav