VG creation from Storage

[GTFSpanneer]

Hi ,
30 Gb allocated from san . i need to create a new logical volume. could you please help me.
Please provide command step by step. first time i am going to create LV from SAN.
disk 58 0/7/1/0/4/0.24.44.0.0.2.0 sdisk CLAIMED DEVICE HP MSA VOLUME

Thanaks in advance.
Regards
RPS

[Wim Rombauts]

Could you please specify your OS-version, and the output of :
"ioscan -fnC disk" for the above disk (we need to know the device file names)

[GTFSpanneer]

Thanks WiM for quick reply. Please find the attached file for output of "ioscan -fnC disk"

Os version is 11.23

Regards
RPS

[g3jza · Accepted solution]

Hi,
it seems that your DSF is missing.
To create it, run:
#insf -v

You should then run #ioscan -fn
again and see your DSF for disk 58

In which Volume group do you want to create your new LV?

After the DSF for the disk58 has been created, then initialize it for LVM usage:
#pvcreate

After the disk has been initialized, add it to the VG, in which you want to create the new LV:
#vgextend

Then create new LV:
#lvcreate -L -n

[GTFSpanneer]

Hi g3jza ,
This LV is temporay purpose for one month. after one month i have reacalim. How to recail it.

regads
RPS

[g3jza]

After deciding that you no longer need the LV and thus FS and all data contained in that FS, then :

# umount
# lvremove /dev//

you can also potentially vgreduce the disk which is used for the VG:
#vgreduce
#pvremove (optional)

Then unpresent the disk from the server so it can be used elsewhere, this is being done on the disk array...

[GTFSpanneer]

Hi g3jza,
Thanks. i don't want to extend the vg . i needd to create PV+VG+LV+FS. please provide me steps.
Thanks in advance.
Regards
RPS

[g3jza]

Did you run the #insf -v
to create the DSF for the new disk?

then #ioscan -fn
again and give me the output of disk58.

[GTFSpanneer]

Hi g3jza,

Please find attached file.

Thanks
RPS

[g3jza]

One more thing, give output of your VG group files please:
#ll /dev/vg*/group

Ok so your new DSFs that got created is according to this: /dev/dsk/c9t2d0, /dev/rdsk/c9t2d0

you wanted to create the PV from it so:
#pvcreate /dev/rdsk/c9t2d0

You didn't specify the parameters of VG, so I assume the defaults will be ok, it's temporary anyways, so:
#mkdir /dev/vgname
#mknod /dev/vgname/group c 64 0x0Y0000
where 'Y' is the number following the last minor number from the #ll /dev/vg*/group output
#vgcreate vgname /dev/dsk/c9t2d0

The 'vgname' should be unique to your system, it could be anything like vgora, vgtemp....doesn't really matter....

Then create the 30GB LV:
#lvcreate -L 30720 /dev/vgname

Create a FS within the LV:
#newfs -F vxfs -o largefiles /dev/vgname/rlvol1 (largefiles option is optional, if you are going to have files bigger than 2GB in that FS)

Finally mount the FS:
#mount /dev/vgname/lvol1 /your_mount_point

[GTFSpanneer]

Hi g3jza,

Thanks . please see the output.

:root>ll /dev/vg*/group
crw-r----- 1 root sys 64 0x000000 Apr 9 2007 /dev/vg00/group
crw-r--r-- 1 root sys 64 0x010000 Apr 16 2007 /dev/vg01/group
crw-r--r-- 1 root sys 64 0x020000 Apr 16 2007 /dev/vg02/group
crw-r--r-- 1 root sys 64 0x030000 Apr 16 2007 /dev/vg03/group
crw-r--r-- 1 root sys 64 0x040000 Apr 16 2007 /dev/vg04/group
crw-r--r-- 1 root sys 64 0x050000 Apr 16 2007 /dev/vg05/group
crw-r--r-- 1 root sys 64 0x060000 Apr 16 2007 /dev/vg06/group
crw-r--r-- 1 root sys 64 0x070000 Apr 16 2007 /dev/vg07/group
crw-r--r-- 1 root sys 64 0x080000 Apr 16 2007 /dev/vg08/group

[Torsten.]

You should use the new agile device file when creating the VG, e.g. /dev/disk/disk__

No need to create a "group" file, if you are running 11.31 march 2008 or newer, just do a

# vgcreate /dev/vgname /dev/disk/disk__

the create the LVOL, create the file system and mount it (see above).

[Torsten.]

Use

# ioscan -m dsf

and search the new device file that matches /dev/dsk/c9t2d0.

[GTFSpanneer]

Hi Torsten,
OS Version is 11.23.

Rgards
RPS

[g3jza]

Torsten: he said OS is 11.23...

[g3jza]

ok,
then:

#mkdir /dev/vgtest
#mknod /dev/vgtest/group c 64 0x090000
would be ok.

[Torsten.]

Sorry, haven't noticed this.


In this case you should vgextend the VG with the other path (/dev/dsk/c14t2d0) for multipathing (PVLINKS):

vgextend vgtest /dev/dsk/c14t2d0

[g3jza]

Torsten: That's a good point, to ensure high availability, forgot about that...

[GTFSpanneer]

Hi g3jza,

Thank you very much. I have created the file system. And i need on more help from you. I need reclaim the space after one month.Please provide steps remove the fs+lv+vg+pv.

Thanks & Regards
RPS

[g3jza]

If you want to remove the FS+LV+VG+PV:

There's no need to remove the FS...I mean, you could just rm -rf /your_mount_point , where the LV is mounted, but that's not necessary, you can go ahead by removing LV+VG+PV like this:

unmount the FS first:
#umount /your_mount_point (where the LV is mounted)

deactivate the VG:
#vgchange -a n vgtest

Shortcut to removing VG:
#vgexport vgtest

one comment here: I hope that only the one LV you created was in vgtest, as the whole vgtest will "disappear"

Optionally remove the PV:
#pvremove /dev/rdsk/c9t2d0

Then tell your storage team to unpresent the disk/lun from the server, so it can be used elsewhere...

[Sunny123_1]

If you want to remove all that you created

then just unmount FS and export volume group

unmount the FS
#umount /mountpoint

Deactivate the Volume Group:
#vgchange -a n vgname

export VG
#vgexport vgname

considering u want to remove all LVs and data.

Remove the Physical Volume
#pvremove /dev/rdsk/c?t?d?

Regards
Sunny

[GTFSpanneer]

Hi g3jza & Sunny,
Thanks.


Reagards
RPS