How to modify PE size

[Joelmel Roche]

Good Day!

Anybody have an idea on how modify PE size in VG?

# vgdisplay vg01
--- Volume groups ---
VG Name /dev/vg01
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 8
Open LV 8
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 4479
VGDA 4
PE Size (Mbytes) 16
Total PE 8958
Alloc PE 8635
Free PE 323
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

[Sajjad Sahir]

Dear Joel Mel
see the attachment
step by step procedure is there

thanks and regards

sajjad

[YAQUB_1]

check the below URL site:-
http://forums12.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1209373624353+28353475&threadId=935769

[YAQUB_1]

U can also check the below URL site:-
http://forums12.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1209373867383+28353475&threadId=792951

[Jeeshan]

Hi

The PE size can not be changed without destroying the VG and recreating it.

This would also entail backing up all of your data, destroy the VG, recreate the VG and LVs and then restore your data.

You need to figure out before creating the vg. Coz this is an important part of vg.

[Aashique]

Hi,
when you create the volume group using vgcreate that time you will use the "-s size"

example:
vgcreate -s 32 vgash /dev/dsk/c8t5d4 /dev/dsk/c10t5d4

For details man vgcreate

[-s pe_size] Sets the number of megabytes in each physical extent, where pe_size is expressed in units of megabytes (MB) in the range 1 to 256. pe_size must be equal to a power of 2 (1, 2, 4, 8, etc.). The default value for pe_size is 4 (four megabytes).

Thanks & Regards
Aashique

[Rasheed Tamton]

It is dicussed in detail in the below link:
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1224820

[Steven E. Protter]

Shalom,

Simple:
1) back up all the data
2) vgexport the volume group
3) vgcreate the volume group anew
4) restore the data.

Summary: You can not modify the PE size after volume group creation.

SEP

[fb1]

use vgmodify on 11.23 as a patch PHCO_35524

or vgmodify is part of 11.31

[fb1]

vgmodify will give you more PE's per disk if you reduce the MAX PV.
USE ignite to change the PE size.

[Torsten.]

>>"Anybody have an idea on how modify PE size in VG?"

The only way is to delete and re-create the VG. PE size cannot be changed in an existing VG.


But "vgmodify" can help you to adjust *other values*, e.g. increase this to a higher number:

Max PE per PV 4479

You need to have 11.31 or 11.23 to do this.