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05-09-2004 09:26 PM
05-09-2004 09:26 PM
I have some doubts about max no.of physical extents in a volume group .
1.what is the default Maximum number of phyisical extents per physical volume ?
2. How to change this value for already created volume group ?
( HPUX 11.00 )
Thanks in advance for the replys.
Rgds,
Guna
Solved! Go to Solution.
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05-09-2004 09:33 PM
05-09-2004 09:33 PM
Re: Maximum number of phyisical extent per physical volume
I won't write a long procedure how to increase it, it was done by any ITRC people very well:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=237408
Anyway insert the string
max pe per pv
in the ITRC search above.
ITRC search is a very good tool for selfsolving.
I am sure that it will help you too.
Best regards,
Ettore
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05-09-2004 09:34 PM
05-09-2004 09:34 PM
Re: Maximum number of phyisical extent per physical volume
#vgdisplay
will display these settings. Ans Sorrie, but they are not changeable after volumegroup creation. A backup, create new one and restore is your only option.
You can specify them with a vgcreate ( -p max_pv] [-s pe_size] )
Regards,
Gideon
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05-09-2004 09:38 PM
05-09-2004 09:38 PM
Re: Maximum number of phyisical extent per physical volume
you can see the mas PE per Pv of a volume group using vgdisplay command.
If not specified at the creation, the max PE is set to match the bigger disk you include in the vgcreate command.
But there is no way to change it after the VG creation.
Johan
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05-10-2004 01:20 AM
05-10-2004 01:20 AM
Re: Maximum number of phyisical extent per physical volume
PE is in 4MB chunks - so 4 PE - max disk size - 16GB, 8 PE, 32GB, etc...
You will have to recreate the VG if you are adding a larger disk to the vg....
Managing Disks:
http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/5187-2216/5187-2216_top.html&con=/hpux/onlinedocs/5187-2216/00/00/84-con.html&toc=/hpux/onlinedocs/5187-2216/00/00/84-toc.html&searchterms=pe%7cmax&queryid=20040510-071853
Rgds..Geoff
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05-10-2004 01:31 AM
05-10-2004 01:31 AM
Re: Maximum number of phyisical extent per physical volume
You should ALWAYS set the values for "PE Size", "Max PE per PV" manually when you create a VG. The reason is that you CAN NOT change ANY of the VG values once the VG has been created.
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05-10-2004 02:31 AM
05-10-2004 02:31 AM
Re: Maximum number of phyisical extent per physical volume
Thanks for all replys .
We can set the max PE per PV , while creation of VG , However how can we set this value for root volume group , while installing we creating the root vg , There i couldn't see the options to set the value for Max PE per Pv
For this I couldn't find the answer from search list.Please help me to resolve.
thanx and rgds,
Guna
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05-10-2004 02:36 AM
05-10-2004 02:36 AM
Re: Maximum number of phyisical extent per physical volume
If you choose the "advanced installation" from the menu, you will get a window with several tabs. You will want the "FILE SYSTEM" tab in there is an "Additional Tasks..." area. Select that and you get a list of 3 or 4 choices. To change the VG parameters you want either the "Volume Parameters" or the "Group Parameters" I can't recall exactly which one at the moment. You can change them there and they will then take effect when the installation is started.
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05-10-2004 02:53 AM
05-10-2004 02:53 AM
SolutionThe default maximum number PE per PV is decided at the time of VG creation. Take a look at this thread. It may help.
http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000068583821
The itrc doc id is KBRC00000244.
Once a vg is created this value Max_PE per PV cannot be modified. You'll have to take a backup and recreate the VG with a new value.
Hope this helps.
Regds
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05-10-2004 04:33 AM
05-10-2004 04:33 AM
Re: Maximum number of phyisical extent per physical volume
Jeff Traigle
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05-10-2004 06:39 AM
05-10-2004 06:39 AM
Re: Maximum number of phyisical extent per physical volume
Bill Hassell, sysadmin