topic Re: lvdisk and virtual disk in Operating System - HP-UX

lvdisk and virtual disk

Eli Daniel — Tue, 25 May 2010 19:54:51 GMT

hi
I have the question.
i have actuality 1 virtual machine guest with disk assigned lvdisk and hard disk.
the vg00 in VM guest has 1 disk assigned lvdisk, nedd add 2 diks in the vg00.
i cant 2 disk hard disk?? or should be added lvdisk??

Re: lvdisk and virtual disk

Tingli — Tue, 25 May 2010 20:04:38 GMT

It is hard to understand the question but my guess is that you need first create lvdisk in the host server then send them to the guest. After that, you can either extend the original vg00 or add new volume groups.

Re: lvdisk and virtual disk

Eli Daniel — Wed, 26 May 2010 13:14:06 GMT

I have a virtual machine a virtual machine host and guest.
vg00 of the guest virtual machine is assigned a lvdisk VMhost internal disk.
VMhost the inner disk has no space to grow.
I can asginar VMhost an external disk to add it as the hard disk to vg00 VMguest?

Re: lvdisk and virtual disk

Torsten. — Wed, 26 May 2010 13:17:20 GMT

It depends.

If you have a multipathed disk and the VMhost is running 11.23 without multipathing software you need to stay with LVM disks.

Re: lvdisk and virtual disk

Tingli — Wed, 26 May 2010 13:25:39 GMT

The best way is to add the san disk in the guest side instead of in the host server. If you have your guest root built in a continues way, then it might be ok. Otherwise, the guest vg00 might be corrupted and can not be repaired.

Not to say that combining internal disk and san disk as in a same vg is a good idea.

Re: lvdisk and virtual disk

Chandrahasa s — Wed, 26 May 2010 13:28:11 GMT

Hi,

If you have extra disk in vmhost or free lvm you can very well assign to vmguest.

Chandra

Re: lvdisk and virtual disk

Eli Daniel — Wed, 26 May 2010 13:28:55 GMT

S.O HP-UX 11.23 Itanium.
I really need to know is if I can VMguest add hard disk to VG disk holding lvdisk.

Re: lvdisk and virtual disk

Eli Daniel — Wed, 26 May 2010 13:32:09 GMT

ok, I understand technically possible. but it is not the best practice.
is that correct?

Re: lvdisk and virtual disk

Chandrahasa s — Thu, 27 May 2010 04:12:37 GMT

Adding lvs of vmhost to vmguest is not best practise its always safe assinging entire physical disk to vm guest.

Chandra

Re: lvdisk and virtual disk

Torsten. — Thu, 27 May 2010 07:46:13 GMT

>> Adding lvs of vmhost to vmguest is not best practise

Why not?

It's IMHO the best if you need less than the complete disk

or

you have a multipathed disk without multipathing software on the host.

Re: lvdisk and virtual disk

Chandrahasa s — Thu, 27 May 2010 16:17:37 GMT

Hi,

If there is disk failure we are in trouble at two places vmhost and guest.

Chandra

Re: lvdisk and virtual disk

Eli Daniel — Tue, 01 Jun 2010 20:18:45 GMT

thanks