lvol creating

[Shehan]

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

[Frank de Vries]

man lvcreate

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

lvcreate -L 1000000 -n /dev/vg06

[Shehan]

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


Regards
Niru

[Frank de Vries]

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).

[Pete Randall]

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

[Frank de Vries]

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.

[Asif Sharif]

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

[Yogeeraj_1]

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

[Cem Tugrul]

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

[Shehan]

Thanks. I did this

Nirukshitha