topic Re: lvol creating in Operating System - HP-UX

lvol creating

Shehan — Wed, 09 Apr 2008 10:55:26 GMT

Hi All

I have already created 2TB volume group. Its name is vg06. Now I want to create logical volume with size of whole amount(2TB).Its name is lvol1.

Please let me know all steps for creating the logical volume.

Thanks
Niru

Re: lvol creating

Frank de Vries — Wed, 09 Apr 2008 11:01:57 GMT

man lvcreate

Example:
Create a logical volume of size 1000000 MB in volume group /dev/vg06:

lvcreate -L 1000000 -n /dev/vg06

Re: lvol creating

Shehan — Wed, 09 Apr 2008 11:05:18 GMT

Don't I need to create file system on it?

Regards
Niru

Re: lvol creating

Frank de Vries — Wed, 09 Apr 2008 11:12:30 GMT

Not necessarily, maybe you use raw devices for Oracle ASM for instance.

For cooked filesystems:

Format: newfs -F vxfs /dev/vg06/
(in case of hfs, choose hfs)

mount /dev/vg06 /filesystem

I assume you need to use largefiles then:
fsadm -F vxfs -o largefiles /dev/vg06/

make entry in /etc/fstab if not part of cluster(ware).

Re: lvol creating

Pete Randall — Wed, 09 Apr 2008 11:12:47 GMT

Yes, you need to create a file system (unless you want to use the raw disk space - for a database, for example), but you asked about creating a logical volume so that's the answer you got. To create a file system, take a look at the man page for newfs.

Pete

Re: lvol creating

Frank de Vries — Wed, 09 Apr 2008 12:53:39 GMT

Dear Nirukshitha

I noticed on your profile that you
have assigned:

"I have assigned points to 2 of 170 responses "

That is a very low ratio.
please read the forum rules again on how to assign points.

Re: lvol creating

Asif Sharif — Thu, 10 Apr 2008 03:31:15 GMT

Hi Niru,

Create a logical volume lvol1 of size 2TB in volume group /dev/vg06 suppose all physical extents are on /dev/dsk/cxtxdx :

#lvcreate -n lvol1 vg06
#lvextend -L 2097152 /dev/vg06/lvol1 /dev/dsk/cxtxdx

If you need a filesystem construct it according to

#newfs -F vxfs /dev/vg06/rlvol1

You may use specific options, e.g. to support largefiles:

#newfs -F vxfs -o largefiles /dev/vg06/rlvol1

See also newfs(1M) and newfs_vxfs(1M) .

Mount it at the desired directory:

#mount /dev/vg06/lvol1 /mountdirectory

For specific mount option examples look into the /etc/fstab , fstab(4) or consult mount_vxfs(1M) .

Check:

#bdf

NOTE: Do not forget to add an appropriate entry in the /etc/fstab , fstab(4) , if you want the logical volume automatically mounted on system start-up.

Regards,
Asif Sharif

Re: lvol creating

Yogeeraj_1 — Thu, 10 Apr 2008 03:55:39 GMT

hi Niru,

this simplest way to do this is to use SAM:

SAM -> Disks and File Systems -> Logical Volumes

then:
Action -> Create

If you want to use Oracle ASM, then steps are slightly different.

if you need any further asistance, please let us know.

kind regards
yogeeraj

Re: lvol creating

Cem Tugrul — Thu, 10 Apr 2008 04:52:36 GMT

Hi,
so if u want to create 1 lvol size 2TB
Then;

#vgdisplay -v your_vgname
Look at the TOTAL PE

#lvcreate -l TOTALPE /dev/your_vgname
#newfs -o largefiles /dev/your_vgname/rlvolname
#mkdir /mountdir
#mount /dev/your_vgname/lvol1 /mountdir

Good Luck

Re: lvol creating

Shehan — Thu, 10 Apr 2008 06:08:42 GMT

Thanks. I did this

Nirukshitha

Re: lvol creating

Yogeeraj_1 — Thu, 10 Apr 2008 06:15:52 GMT

hi Niru,

if you used CEM's guidelines above, dont forget to update your /etc/fstab accordingly.

This will ensure that the file system is mounted each time the server is restarted, for example.

hope this helps too!
kind regards
yogeeraj

Re: lvol creating

Shehan — Thu, 10 Apr 2008 06:33:56 GMT

I updated the /etc/fstab.

Thanks for the noticing

Regards
Nirukshitha

Re: lvol creating

Asif Sharif — Thu, 10 Apr 2008 07:03:17 GMT

Hi Niru,

If your problem solved please assign points.

Regards,
Asif Sharif