how to check the size of vg00

[Karthick K S]

Hi all,

I have vg00 vg i want to check the disk space of this vg,pls tell how to check

[Arunvijai_4]

#vgdisplay

-Arun

[Luk Vandenbussche]

Hi,

vgdisplay -v vg00

Free space (MB) = free PE x 4 PE size

Check this for each Physical volume

LV size in MB is given for each lvol

If used PV = 2 or greater, then you have a mirrored disk

[Mel Burslan]

vgdisplay vg00

look at the output and note these values

PE size
Total PEs

multiply these two numbers the result is tha total capacity of the vg00 in megabytes.

if you want to calculate free space, instead of Total PEs, use Free PEs.

Hope this helps

[Rajesh SB]

Hi,

Just run the cmd like

# vgdisplay vg00
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 6
Open LV 6
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 4350
VGDA 2
PE Size (Mbytes) 8
Total PE 4340
Alloc PE 4340
Free PE 0
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

In the output observe for Alloc PE (eg:4340), and PE Size (Mbytes).
Caluclate now
actual size=Alloc PE * PE Size (Mbytes)

CHeers,
Rajesh

[Devender Khatana]

Hi,

#vgdisplay -v /dev/vg00

will give you all details.

Check

PE Size (Mbytes) 16
Total PE 17496
Alloc PE 14256
Free PE 3240

Total size of vg00 is

=Total PE * PE Size

HTH,
Devender

[Rajesh SB]

Just a correction here.
Look for Total PE and PE Size (Mbytes)

Actual Size = Total PE * PE Size (Mbytes)

Regards,
Rajesh

[Orhan Biyiklioglu]

vgdisplay vg00 | awk '/PE Size \(Mbytes\)/{s=$4}; /Free PE/{f=$3}; END{print s*f" Mbytes free space available on volume group."}'

vgdisplay vg00 | awk '/PE Size \(Mbytes\)/{s=$4}; /Total PE/{f=$3}; END{print s*f" Mbytes total space on volume group."}'

hth

[Adisuria Wangsadinata_1 · Accepted solution]

Hi,

Use 'vgdisplay' command :

# vgdisplay /dev/vg00

--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 14
Open LV 14
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 4384
VGDA 4
PE Size (Mbytes) 32
Total PE 8748
Alloc PE 1830
Free PE 6918
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

From the example above, the size of vg00 is [Alloc PE x Free PE] = 1830 x 32 = 58560 Mbytes.

You need also to check if the vg00 is mirrored or not. Check by using lvdisplay onto the logical volume at vg00.

# lvdisplay /dev/vg00/lvol1

If mirrored, you need to devide it by the number of mirror + 1.

Let say if from lvdisplay, you find mirror copies is 1, so the vg00 size above is 58560 / (1+1) = 58560 / 2 = 29280 MBytes.

The condition above if all logical volume in vg00 is mirrored.

Hope this information can help you.

Cheers,
AW

[Karthick K S]

how to check free space

[Joseph Loo]

hi,

adi should have explain how to retrieve free space from the output of vgdisplay:

# vgdisplay -v vg00
refer to Free PE where PE is in extents, thus to convert to MB, multiply by PE Size.

http://docs.hp.com/en/B2355-90692/vgdisplay.1M.html

regards.

[AwadheshPandey]

link:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=763059&admit=-682735245+1130402918678+28353475

view attached documents in this thread.

Solution to ur lvm issues

Awadhesh

[Karthick K S]

but in my server

VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 12
Open LV 12
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 4350
VGDA 4
PE Size (Mbytes) 8
Total PE 8680
Alloc PE 8680
Free PE 0
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

see Free PE is 0

[AwadheshPandey]

See attached doc

Solution to ur lvm issues

Awadhesh

[Joseph Loo]

hi,

this would mean u have allocated all your extents from that volume group, vg00.

use bdf to check the available and used file system, if that is what u want to know.

regards.

[Joseph Loo]

hi,

this would mean u have allocated all your extents from that volume group, vg00.

use "bdf" command to check the available and used file system, if that is what u want to know:

# bdf

regards.

[Devender Khatana]

Hi,

You can see the free space allocated to file systems using bdf command.

If you wish to see unallocated space in the vg then Free PE multiplied by PE Size will get that fot you. Allthough here as the free PE is zero, you do not have any space in the VG unallocated.

HTH,
Devender

[AwadheshPandey]

use df and du command to check free space,
man df
man du
u can use
man lvdisplay
man vgdisplay
man pvdisplay

Awadhesh

[Muthukumar_5]

Your VG status is as,

VG Status available

Total PE 8680
Alloc PE 8680
Free PE 0


Free PE = Total PE - Alloc PE
0 = 8680 - 8680

It is stating correct information.

# bdf will give file system usage statistics.

My VG status is as,

Total PE 4374
Alloc PE 639
Free PE 3735

They are calculated as per above calculation.

-Muthu

[Alzhy]

Use the attached script - which I got from the forums and mod'ed.

[Sandman!]

Karthik,

This one-liner awk script might help:

vgdisplay vg00|awk '/^PE Size/{size=$NF}/^Free PE/{free=$NF}END{print size*free" MB"}'

cheers!

[Geoff Wild]

Your vg00 has no more unallocated space.

However - there may be space in an existing lvol...

do a vgdisplay -v vg00

check the lvols and see if they are in your fstab file.

If there is any the=at are not in fstab - then they may be free - you might want to mount them temporarily first...

IE - say there is a lvol12 in the vgdisplay -v vg00 output - but lvol12 isn't in the fstab...

Make sure it isn't in swap with a swapinfo -tam

mount /dev/vg00/lvol12 /mnt

take a look - if it isn't needed - then remove it with the lvremove command - then reallocate that space to another lvol...

Rgds...Geoff

[Karthick K S]

hi how to extend root filesystem.

[Arunvijai_4]

Here are some threads about extending root FS
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=865252
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=97821

Try to assign points to replies..

-Arun

[Sandman!]

Owing to contiguous extent allocation for boot/root/swap your SAFEST bet is to use ignite. Make a recovery tape; boot your system off it and interactively change the size of root.

You can extend the root filesystem online with fsadm, but that procedure's tedious and fraught with risks as the system could panic if the appropriate patches aren't present.

regards!