VGRA too big for specified parameters

[Annelise Wilken]

Hello,

I have an rx4640 itanium server with 2 internal disks (2 x 36GB) which I've used for the OS only, and 2 external 146GB disks which I am going to be using as mirror copies for data. (i.e one of the 146GB disk will be primary data disk and the other disk will be a mirror copy)

I am trying to create a new volume group on the external 146GB disk through SAM and I receive the error "VGRA is too big for specified parameters. Increase the extent size or decrease max_PVS | pam_LVS and try again"

The settings are as follows:

MAX PE: 35004
Max Log vols: 255
Max Phys Vols: 16
Physical Extent Size: 4

If I increase the Physical Extent size to 8MB will this suffice, or is it preferable to reduce log vols to 250 and reduce Max Phys vols to 14???


Many thanks.

[Arunvijai_4 · Accepted solution]

have a look at the following threads, it should help you a lot

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=739558
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=17727
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=825184

(Specify PE as 32 MB)

-Arun

[RAC_1]

You have two options. Increase pe count (-e option for vgcreate) or increase pe size (-s option)

man vgcreate for details.

[James R. Ferguson]

Hi:

The 'lv_max' value has the least impact on the maximum VGRA size. I would not reduce your 'max_pv" limit unless you are very sure that you are not going to grow your volume group long-term. You should also consider that you may (later) add larger physical disks than those you now have. In this case, you do not want to set too low a value for 'max_pe'. Therefore, I would increase the 'pe_size'.

The Software Recovery Handbook (chapter 16, LVM) has an excellent chart offering various values for your choice, if you wish to consult it:

http://www1.itrc.hp.com/service/iv/docDisplay.do?docId=prodITRC/DE_SW_UX_swrec_EN_01_E/LVM.pdf

Regards!

...JRF...

[Annelise Wilken]

Apologies for the huge delay - I thought I'd closed this one! (Sorry) - solved by changing PE to 32 - thanks again and apologies for the delay!