topic Re: pvdisplay in Operating System - HP-UX

pvdisplay

allan_48 — Thu, 07 Apr 2005 10:50:41 GMT

I have a EMC disk storage. I tried looking for the free disk. When I tried to use pvdisplay a disk in the local server I have a message stating,
ex. pvdisplay -v /dev/dsk/c1t10d2
"pvdisplay: Couldn't find the volume group to which
Physical volume "device_file" belongs.
pvdisplay: Cannot display physical volume "device_file"

but when I tried to issue the same command on my other server it stated like this.

"pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c1t0d1":
The specified path does not correspond to physical volume attached to
this volume group
pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c1t0d2":
The specified path does not correspond to physical volume attached to
this volume group
pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c1t0d3":
The specified path does not correspond to physical volume attached to
this volume group
pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c1t0d4":
The specified path does not correspond to physical volume attached to
this volume group
pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c1t0d5":
The specified path does not correspond to physical volume attached to
this volume group
pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c1t0d6":
The specified path does not correspond to physical volume attached to
this volume group
pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c1t0d7":
The specified path does not correspond to physical volume attached to this volume group"
pvdisplay: Warning: couldn't query physical volume "/dev/dsk/c1t3d7":
The specified path does not correspond to physical volume attached to
this volume group
pvdisplay: Warning: couldn't query all of the physical volumes.
pvdisplay: Couldn't retrieve the names of the physical volumes
belonging to volume group "/dev/vgbscs".
pvdisplay: Cannot display physical volume "/dev/dsk/c1t10d2".

Is the disk really free?

thanks

Re: pvdisplay

RAC_1 — Thu, 07 Apr 2005 10:57:23 GMT

ioscan -fnCdisk, do see this disk as claimed?? If not do insf -ev and check again.

Can you do diskinfo /dev/rdsk/c1t10d2??

Anil

Re: pvdisplay

Rick Garland — Thu, 07 Apr 2005 11:00:39 GMT

Do you have MC Service Guard in the environment? BCV copies to any of those disks?

The pvdisplay command will not tell you if the disk is free. The disk could be a backup disk for BCV copies or for MCSG failovers (these are a couple of examples).

You may want to start looking in the /etc/lvmtab file. 'strings /etc/lvmtab'

There can be a lot of cross-correlation with devices in a MCSG environment.

Re: pvdisplay

allan_48 — Thu, 07 Apr 2005 11:22:23 GMT

I made an ioscan -fnC disk on both server and they are both
claimed. I did an diskinfo on both server and it prompt some messages
"SCSI describe of /dev/rdsk/c1t10d2:
vendor: EMC
product id: SYMMETRIX
type: direct access
size: 4418880 Kbytes
bytes per sector: 512"

Yes we do have an MC service guard.I tried to look on the /etc/lvmtab
but one of the server has the scsi address that belongs to a volume
group(vg003)

How will i find out if the disk i want to use is not used by other server?

thanks

Re: pvdisplay

RAC_1 — Thu, 07 Apr 2005 12:57:00 GMT

There is EMC utility syminq or something similar that you canuse. Additionally you can do something like follows for it.

echo "0x2008?4D" |adb /dev/dsk/c20t0d0 --disk1
echo "0x2008?4D" |adb /dev/dsk/c19t0d0 â disk