topic Re: Extending the VG with Multiple Path in Operating System - HP-UX

Extending the VG with Multiple Path

UVA — Mon, 12 May 2008 06:26:12 GMT

Hi,

Good Morning

I have Eva 8100 with 2C6D, When i present a VD to my hp-ux its gets 16 path, i have created one VG by using first path of VD,

now what's the problem is extending the additional paths to my VG, extending remainig 15 path to my VG is little difficult as already some more vg's are available, so the ioscan command is showing lots of paths.
i need to find all the paths for my VG

is any alternate method is there to simplify this task

Re: Extending the VG with Multiple Path

Steven E. Protter — Mon, 12 May 2008 06:44:03 GMT

Shalom,

Take a look at the volume group with vgdisplay -v.

Extend along the same path that it was created on and the other paths should be fine.

SEP

Re: Extending the VG with Multiple Path

UVA — Mon, 12 May 2008 09:37:18 GMT

Hi,

I am vgextending with by following paths, but some of the paths are not getting extend

my alternate paths

/dev/dsk/c2t0d1
/dev/dsk/c4t0d1
/dev/dsk/c6t0d1
/dev/dsk/c8t0d1

/dev/dsk/c12t0d1
/dev/dsk/c14t0d1
/dev/dsk/c16t0d1
/dev/dsk/c18t0d1

/dev/dsk/c22t0d1
/dev/dsk/c24t0d1
/dev/dsk/c26t0d1
/dev/dsk/c28t0d1

/dev/dsk/c32t0d1
/dev/dsk/c34t0d1
/dev/dsk/c36t0d1
/dev/dsk/c38t0d2

# strings /etc/lvmtab
/dev/vg00
/dev/disk/disk3_p2
/dev/VG_EDV_DATA
/dev/dsk/c2t0d1
/dev/dsk/c2t0d3
/dev/VG_EDV_LOG
/dev/dsk/c2t0d2
/dev/VG_EDV_SAPBACK
/dev/dsk/c2t1d0

Volume group VG_EDV_DATA
=========================

But im getting error and some of the path are extended rest is not.

#vgextend VG_EDV_DATA /dev/dsk/c4t0d1 /dev/dsk/c6t0d1 /dev/dsk/c8t0d2 /dev/dsk/c12t0d1 /dev/dsk/c14t0d1 /dev/dsk/c16t0d1 /dev/dsk/c18t0d1 /dev/dsk/c22t0d1 /dev/dsk/c24t0d1 /dev/dsk/c26t0d1 /dev/dsk/c28t0d1 /dev/dsk/c32t0d1 /dev/dsk/c34t0d1 /dev/dsk/c36t0d1 /dev/dsk/c38t0d2

# ./vgextnd
vgextend: Couldn't install the physical volume "/dev/dsk/c8t0d2".
Device busy
vgextend: Couldn't install the physical volume "/dev/dsk/c24t0d1".
Device busy
vgextend: Couldn't install the physical volume "/dev/dsk/c26t0d1".
Device busy
vgextend: Couldn't install the physical volume "/dev/dsk/c28t0d1".
Device busy
vgextend: Couldn't install the physical volume "/dev/dsk/c32t0d1".
Device busy
vgextend: Couldn't install the physical volume "/dev/dsk/c34t0d1".
Device busy
vgextend: Couldn't install the physical volume "/dev/dsk/c36t0d1".
Device busy
vgextend: Couldn't install the physical volume "/dev/dsk/c38t0d2".
Device busy

After extending
===============
/dev/vg00
/dev/disk/disk3_p2
/dev/VG_EDV_DATA
/dev/dsk/c2t0d1
/dev/dsk/c2t0d3
/dev/dsk/c4t0d1
/dev/dsk/c6t0d1
/dev/dsk/c12t0d1
/dev/dsk/c14t0d1
/dev/dsk/c16t0d1
/dev/dsk/c18t0d1
/dev/dsk/c22t0d1
/dev/VG_EDV_LOG
/dev/dsk/c2t0d2
/dev/VG_EDV_SAPBACK
/dev/dsk/c2t1d0

Re: Extending the VG with Multiple Path

Mridul Shrivastava — Mon, 12 May 2008 09:46:37 GMT

This is because you are adding another link for the same PV and the max alternate link can be added to one PV is 7.

Have a look at the following thread, this will clear up the things:

http://forums12.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1208475137003+28353475&threadId=1210636

Re: Extending the VG with Multiple Path

Mridul Shrivastava — Mon, 12 May 2008 09:50:53 GMT

you have assigned points to 27 of 77 responses. Please take some time to assign points so the person gets the credit for his reply in terms of points.

Probably you may see more answers coming in if they see you are giving credit for the time spent by someone.

Thanks for the understanding and Have a nice day.

Mridul

Re: Extending the VG with Multiple Path

Avinash Agarkar — Mon, 12 May 2008 09:52:43 GMT

Hi

while creating new Vg use -

vgcreate -p 16 vgname

so you will be able to extend the vg with alternate path too.

Thanks,
Avinash

Re: Extending the VG with Multiple Path

Mridul Shrivastava — Mon, 12 May 2008 09:59:56 GMT

>>Avinash,

-p is for the max_pv and here the problem is in adding alternate path not the new PV and Currently LVM supports a maximum of 8 paths to a physical volume (7 alternates and one primary).

Re: Extending the VG with Multiple Path

UVA — Mon, 12 May 2008 10:46:40 GMT

Hi,

Thanks for your responces, i got cleared

Hi Mirdul

I Always giving good points, befre my forum
name was c.uvaraja.