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тАО01-19-2005 02:22 AM
тАО01-19-2005 02:22 AM
Thanks in advance
Solved! Go to Solution.
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тАО01-19-2005 02:27 AM
тАО01-19-2005 02:27 AM
Solutionvery very sorry: no way !!!!
PE size is one of the few parameter you MUST decide when you create the VG.
Changing this parameter means to destroy the vg and recreate it.
Be carefull and think about also the parameters:
MAX PE per PV
MAX PV
MAX LV
above all the first one which, with the PE size, limits the maximum disk size you can handle inside a created vg
hope it helps
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тАО01-19-2005 02:36 AM
тАО01-19-2005 02:36 AM
Re: Changing PE size?
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тАО01-19-2005 02:37 AM
тАО01-19-2005 02:37 AM
Re: Changing PE size?
you can change PE size only during creating
new vg. The only way is:
1. backup
2. remove vg
3. create new vg with new PE size
4. restore
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тАО01-19-2005 02:38 AM
тАО01-19-2005 02:38 AM
Re: Changing PE size?
Sorry for above reply.
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тАО01-19-2005 02:38 AM
тАО01-19-2005 02:38 AM
Re: Changing PE size?
create a new vg with the right settings
create dummy filesystem/mountpoints
...(I like x-oldmountpointname)
Now leave both of these mounted up and
do a simply use fbackup/frecover to copy your data. I tend to do this last part when I can take things down, so everything is clean..
cd /oldmountpoint
# fbackup -i . -f - | (cd /x-mountpoint; frecover -Xsrf -)
Rgrds,
Rita
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тАО01-19-2005 02:39 AM
тАО01-19-2005 02:39 AM
Re: Changing PE size?
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тАО01-19-2005 03:43 AM
тАО01-19-2005 03:43 AM
Re: Changing PE size?
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тАО01-20-2005 02:27 AM
тАО01-20-2005 02:27 AM
Re: Changing PE size?
Rebuilding the VG is the only way. Also keep an eye on the value for MAX PE per PV as this might come back later on as a new issue.
The default MAX PE per PV size is double the number of PE's on your largest disk in that specific volume group.
HTH
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тАО01-30-2008 02:26 PM
тАО01-30-2008 02:26 PM
Re: Changing PE size?
I don't want to start a new thread so I'd like to ask here:
I would like to re-create volume group so I can change the current value of PE Size(4MB) to higher value(16MB). Does the recreation of volume group corrupt data? The only reason I want to do this is that I need to extend some mounts
I've read a lot about this and found out something about vgexport command.
These are my steps I'd like to do in order to achieve higher value of PE Size:
1. umount all mounts using vg01
2. vgchange -a n /dev/vg01
3. vgexport /dev/vg01
4. mkdir /dev/vg01
5. mknod /dev/vg01/group c 64 0x010000
6. pvcreate -f /dev/c0t5d0
7. vgcreate -s 16 /dev/vg01 /dev/dsk/c0t5d0
8. recreate all logical volumes and mount them back.
On my testing system, I actually found out that it worked since all of the data in remounted LV's was there and readable.
Is this not going to corrupt any data?
Offcourse I should consider to backup all of the data first...
Thank you for your opinions