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тАО06-30-2003 03:21 AM
тАО06-30-2003 03:21 AM
Sometimes when I add a disk to a existing VG, I got the warning tha the Max_PE_per_PV is too small. Then I can only use a part of the physical disk.
Is it possible to change Max PE on a existing VG?
Regards
Tina Stevnhoved
WM-DATA
email: tiste@wmdata.com
Solved! Go to Solution.
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тАО06-30-2003 03:25 AM
тАО06-30-2003 03:25 AM
Re: Max_PE_per_PV
Sorry, no. The Max PE setting is done at vgcreate.
Pete
Pete
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тАО06-30-2003 03:28 AM
тАО06-30-2003 03:28 AM
SolutionBill Hassell, sysadmin
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тАО06-30-2003 03:29 AM
тАО06-30-2003 03:29 AM
Re: Max_PE_per_PV
the simple answer is, unfortunatly, NO.
You define this parameter when you create the vg, with a combination of the "-s, -l, -e" options.
I suggest you to create a new vg, with the appropriate parameter, put the new and big disk there, an plan how to move your old app to this new vg.
If it is vg00, you may even think of a fresh re-install, with the make_tape_recovery.
HTH,
Massimo
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тАО06-30-2003 03:33 AM
тАО06-30-2003 03:33 AM
Re: Max_PE_per_PV
max_PE an option of the vgcreate command.
You can backup data in vg, export vg, recreate your VG with disk having max dimension first and next add the other disk, reimport data.
Enrico.
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тАО06-30-2003 03:40 AM
тАО06-30-2003 03:40 AM
Re: Max_PE_per_PV
"...Sometimes when I add a disk to a existing VG...then I can only use apart of the disk..."
If you've been adding different size disks into one vg then determine which disk is largest and recreate the entire vg using the largest first.
Default MAX_PE = 1016 and PE_SIZE = 4 mb.
Example:
vgcreate -e 40000 -s 8 /dev/vg## /dev/dsk/cXtYdZ
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тАО06-30-2003 03:46 AM
тАО06-30-2003 03:46 AM
Re: Max_PE_per_PV
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тАО06-30-2003 03:57 AM
тАО06-30-2003 03:57 AM
Re: Max_PE_per_PV
check for the man pages of vgcreate(1M)
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тАО06-30-2003 05:38 AM
тАО06-30-2003 05:38 AM
Re: Max_PE_per_PV
If you are going for new vg's, then also check the kernel parameter MAXVGS - make sure it is large enough to accomodate your needs.
For say a 32GB LUN - set PE Size to 8 (Mbytes) to say 4315. Also, if you need a lot of disk in your vg, bump up the MAX PV - -p with vgcreate.
Rgds...Geoff
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тАО07-03-2003 01:17 AM
тАО07-03-2003 01:17 AM
Re: Max_PE_per_PV
Tim