Originally posted by: SystemAdmin

Hi !
Im traing to change a LV to a stripe LV.
I have 5 disks of 952PPs and I need the LV of 4728PPs.

The stripe size is of 128K .

When I try mklv I get that the -u or -C have to be even number ....

Do I have to add 1 disk or 3 disks ... to have 8 ... and 128 is multiple of 8 ??

Thanks in advance for any help.

Alan
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Originally posted by: tony.evans

Please show us an lsvg -p <vgname> and the command you're running.
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Originally posted by: SystemAdmin

Thanks for your answer !!

1. lsvg -p vg02

vg02:
PV_NAME PV STATE TOTAL PPs FREE PPs FREE DISTRIBUTION
hdiskpower23 active 952 0 00..00..00..00..00
hdiskpower24 active 952 0 00..00..00..00..00
hdiskpower25 active 952 0 00..00..00..00..00
hdiskpower26 active 952 0 00..00..00..00..00
hdiskpower27 active 952 31 00..00..00..00..31

I already try :
mklv -ylvoralog -S128K -C4 vg02 4728
mklv -ylvoralog -S128K -C5 vg02 4728

mklv -ylvoralog -S128K vg02 4728
mklv -ylvoralog -S128K -u5 vg02 4728

Thanks again ...

Alan
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Originally posted by: tony.evans

You have 31 free PP's in your volume group, not sure why you expect AIX to create a logical volume of 4728 PP's in size when there's no space?
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Originally posted by: SystemAdmin

Sorry ... I forgot to tell ...
I remove this LV and recreate it ... this is the actual state .. ..
So I make rmlv and then .. the mklv
sorry

;)
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Originally posted by: tony.evans

Ok, and can you copy and paste the command and the exact error message.
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Originally posted by: SystemAdmin

mmm I dont have the error where ask me to select an even number of disks ...
but ..

1. mklv -ylvoralog -S128K -u4 vg02 4728

0516-1043 lquerypv: There are not enough physical volumes to create a
striped logical volume.
0516-822 mklv: Unable to create logical volume.
so ... if I use -u5 I get an error saying me to use an even number of disks.

Thanks !!

Alan
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Originally posted by: SystemAdmin

I would suggest adding the option -C4 and see if that helps.
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Originally posted by: SystemAdmin

I would suggest adding the option -C4 and see if that helps.

i.e.

mklv -ylvoralog -S128K -C4 -u4 vg02 4728
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Originally posted by: SystemAdmin

but ...
with 4 i dont get the 4728 ...
and with 5 it asks for even number of disks ...

and IBM ask me for the error code .. mmm I dont have it
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Originally posted by: SystemAdmin

I'm not sure it's a question of an even number of disks.
I think the issue is that the "-u" option must be an even multiple of the "-C" option.
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Originally posted by: tomkiat

I usualy use hardware striping like RAID 10 and leave it to SAN to handle it. i also assume u are doing this for performance reasons right?
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Originally posted by: andycor

The problem here is not with the number of disks but with the number of PPs. The system is expecting a number of PPs multiple with the number of disks.

Try the following:

mklv -ylvoralog -S128K -C5 vg02 4730

Regards.
Andres Cordoba.
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