Migrating an FS from one storage to another

[kunjuttan]

Hi all,

I am having an HP-UX 11.11 Server.I have one filesystem which need to be increased.This storage in which this particular FS resides in not having any free space.So I need to use new storage.Now my problem is I need to move this FS from old storage to new storage which is having enough free space.How can I able to achieve this.Pls help me.

[Pete Randall]

Uhhhhh, create a new FS and copy the data from the old to the new?

What are you asking here? How to copy, how to create the new FS, what?


Pete

[Torsten.]

Take a backup and restore it to the new location.

[Rita C Workman]

Let me add aother questions...

What kind of storage?

Rgrds,
Rita

..providing all the details first, really helps speed up the process..

[kunjuttan]

thanx for the quick replies.But can i do like the following.

existing FS size is 500GB
I will create new 500GB lun in new storage and present it to Server.
create pv.
extend vg
mirror the lv
then break the mirror
and remove the old PV

Can I do it like this.bcos i cant have an option for backing up the data and restoring it.

Pls help me out.If the above process is possible i need the exact steps.

[Torsten.]

Yes you can do this, but finally you get the same amount of space, right?

[kunjuttan]

that is right torsten..bt i need to extend this particular FS.for tht we dont have enough space in old storage.thts y we need to move it to new storage and i will extend it..can u pls help the steps too..

[Torsten.]

Since this is 11.11 you need to create another LUN and vgextend the existing VG.

Don't expand the LUN!

[kunjuttan]

thanx torsten..i dont know how to break the mirror..how to do it..wht is the risk involved..???

[Mel Burslan]

breaking the mirror is not dangerous and in your case is not necessary ? If your storage is on SAN, why do you need a mirror ? Doesn't your SAN have some data protection schema like RAID 1+0 or at least a RAID-5 ?

But again, you do not need to break the mirror on the LVM side. You just create another couple of LUNs, Do a pvcreate, then vgextend to cover the new LUNs. Then expand your filesystems onto these new devices as you usually do ? It is not a necessity that all your data on any given VG staying on the same device. It is the beauty of LVM.