topic Re: How to create and move the LV from HPSAN to vg00 ? in Operating System - HP-UX

How to create and move the LV from HPSAN to vg00 ?

DnD_1 — Thu, 09 Jul 2009 08:15:26 GMT

Hi,

I have the following filesystem which mount from HP-SAN,

/dev/vgBankHSBC/lv_bankHSBC 4012288 623909 017560 76% /bank1/opt

Which I have to create and move to Vg00, can anyone guide me the steps ?

Many thanks !!

Re: How to create and move the LV from HPSAN to vg00 ?

Roopesh Francis_1 — Thu, 09 Jul 2009 08:27:06 GMT

Hi,

you need to create logical volume using lvcreate.no other way.
lvcreate -L size -n lvname vg00
newfs -F vxfs /dev/vg00/lvol
create mount point and mount the file system.copy the data from /bank1/opt to new mount point
BTW why you need to create data volume in vg00

Re: How to create and move the LV from HPSAN to vg00 ?

Torsten. — Thu, 09 Jul 2009 08:39:29 GMT

But you should keep vg00 clean an store any data in other VGs.

Re: How to create and move the LV from HPSAN to vg00 ?

Fabio Ettore — Thu, 09 Jul 2009 08:46:35 GMT

Hi,

usually it's good to keep vg00 only for system crucial filesystems, like /stand, /usr, /opt, etc.

Anyway if you are really interested to move data from a filesystem to another one, you can use the following command:

- create the new filesystem on vg00 by lvcreate and newfs;
- move data:
cd /bank1/opt
find . -xdev -print | cpio -pdmvux /

Otherwise you can backup data from /bank1/opt and restore them to new filesystem.

Definitely you have some possibilities.

HTH.

Best regards,
Fabio

Re: How to create and move the LV from HPSAN to vg00 ?

Suraj K Sankari — Thu, 09 Jul 2009 08:55:49 GMT

Hi,
create a new lv under vg00
mount it and then move all data from this lv to new lv or
take a backup of existing lv create a new lv under vg00, mount it and restore all data from your backup.
before going to create lv into vg00 check you vg00 is having sufficient space to create new lv.

steps are
vgdisplay -v vg00
lvcreate -L 3920 -n myvolume /dev/vg00
newfs -F vxfs -o largfiles /dev/vg00/mymolume
mkdir /newmountpoint

mount /dev/vg00/myvolume /newmountpoint

then cipo to copy data
find . -print | cpio -pdl /newmountpoint

for more info on cpio see the below link

http://www.ncsa.illinois.edu/UserInfo/Resources/Hardware/IBMp690/IBM/usr/share/man/info/en_US/a_doc_lib/cmds/aixcmds1/cpio.htm

Suraj

Suraj

Re: How to create and move the LV from HPSAN to vg00 ?

DnD_1 — Thu, 09 Jul 2009 09:35:12 GMT

Thanks all.

but i have to mount to the same directory /bank1/opt....how can I do that

Re: How to create and move the LV from HPSAN to vg00 ?

Torsten. — Thu, 09 Jul 2009 09:40:38 GMT

Mount the new LVOL to another mount point, let's say

/bank1/opt_new

copy the data, unmount the old and mount the new LVOL to the original mount point.

You need to stop the accessing application for that.

Re: How to create and move the LV from HPSAN to vg00 ?

Sunny123_1 — Thu, 09 Jul 2009 09:54:43 GMT

Hi

Follow the Torsten's steps.

Regards
Sunny

Re: How to create and move the LV from HPSAN to vg00 ?

Sharma Sanjeev — Thu, 09 Jul 2009 11:06:11 GMT

Hi

Follow Above procedure BUT

Make sure to update /etc/fstab with new changes

Regards
Sanjeev

Re: How to create and move the LV from HPSAN to vg00 ?

Suraj K Sankari — Fri, 10 Jul 2009 03:26:01 GMT

Hi Again,
>>but i have to mount to the same directory /bank1/opt....how can I do that

you already have this mount point on your system so no need to create, after creating new lv and copy or move old data into new lv just mount

mount /dev/vg00/myvolume /bank1/opt

and change your fstab with your new lv name.

Suraj

Re: How to create and move the LV from HPSAN to vg00 ?

DnD_1 — Fri, 10 Jul 2009 07:32:12 GMT

so here are the steps,

1. lvcreate -L 3072 -n lv_bankHSBC /dev/vg00
2. newFS -F vxfs /dev/vg00/rlv_bankHSBC
3. unmount /bank1/opt
4. cp all data from /bank1/opt to /bank1/new_opt/
5. rename /bank1/opt to /bank/opt_old
6. rename /bank1/new_opt to /bank1/opt
7. mount /dev/vg00/lv_bankHSBC /bank1/opt

right ?

Re: How to create and move the LV from HPSAN to vg00 ?

Torsten. — Fri, 10 Jul 2009 07:34:50 GMT

First copy, then unmount the source.

Re: How to create and move the LV from HPSAN to vg00 ?

Fabio Ettore — Tue, 14 Jul 2009 07:19:51 GMT

Hi,

steps are good however you don't need points 5 and 6 to rename mount points. You can change just the logical volume definition into /etc/fstab in order to have /dev/vg00/lv_bankHSBC. Then umount the old filesystem and mount the new one as follows:

mount /bank1/opt

This command reads into /etc/fstab and will mount the new filesystem for the lvol /dev/vg00/lv_bankHSBC.

HTH.

Best regards,
Fabio