topic Re: vgcreate hangs in Operating System - HP-UX

vgcreate hangs

Vic006 — Thu, 21 May 2009 13:50:24 GMT

Hi Gurus,

I have 5 BL860C loaded with HP-UX 11.31, and all 5 box are attached to a HItachi A9500 Series array.
I was able to do pvcreate successfull, but when i do vgcreate it hangs.
ioscan shows all the disks claimed
dd command also hangs

This a is a new disk array, what could be the possible issue.

Is this the HW issue or is there any different way to create volumes in 11.31

Re: vgcreate hangs

James R. Ferguson — Thu, 21 May 2009 13:53:30 GMT

Hi:

The 'vgcreate' command needs to write LVM metadata to the physical disk. Its hanging is consistent with 'dd' hanging. Claimed hardware only indicates that the correct drivers are present and that at one time the hardware responded to a probe.

You have a hardware or connection issue with the array.

Regards!

...JRF...

Re: vgcreate hangs

Mel Burslan — Thu, 21 May 2009 13:58:12 GMT

Similar issue encountered and later was attributed to some SAN zoning problems in the past for us. I was not the one involved directly with it, so details elude me. Make sure you speak to your SAN admins.

Re: vgcreate hangs

Sandy Chen — Thu, 21 May 2009 14:08:47 GMT

Hi,

Check your zoning, how does you do it? Make sure you create a separate grouping for windows machine and hpux machine

Regards,
Sandy

Re: vgcreate hangs

Bill Hassell — Fri, 22 May 2009 03:01:35 GMT

Look at SAN zoning and if you are using some sort of disk virtualization (snapshots, clones, timeviews) then the LUN may appear in ioscan but it does not respond. One additional check is to run diskinfo on the raw disk device file. It will likely report 0 bytes, thereby confirming a presentation error from your SAN.

Re: vgcreate hangs

Nido — Fri, 22 May 2009 03:06:25 GMT

Hi,

As suggested above, check the SAN zoning for the assigned LUNs.
Can you run `ioscan -fnC disk` again and see the status of the devices.

If you use `ioscan -kfnC disk` devices are not scanned and the device status are taken from kernel image.

Thanks,

Re: vgcreate hangs

Suraj K Sankari — Fri, 22 May 2009 04:39:04 GMT

Hi,

Are you able to do diskinfo ?

Suraj

Re: vgcreate hangs

tkc — Fri, 22 May 2009 07:56:06 GMT

#ioscan -fnC command to check if the disk is detected

#diskinfo command to check if the disk is responding

#dd command to check if the whole disk is readable

I suspect you are having problem from diskinfo. It could be fibre channel driver version update needed to work with the array.

Check the FC adapter used and get the driver from http://software.hp.com

Re: vgcreate hangs

johnsonpk — Fri, 22 May 2009 09:59:02 GMT

Hi,

Have you verified the HBA model and Firmware compatibility with the new storage?

Try removing and create a new zone ,
Try allocating smaller size LUN if the current one is of big size.

LVM 2 is available in v3 try creating vg in lvm2

Thanks!!
Johnson