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тАО03-26-2011 10:30 AM
тАО03-26-2011 10:30 AM
mirroring logical volume
i have created a logical volume lvol11 and i forget to choose the mirroring option from sam. in addition the logical volume is mounted in /test
my question is how i can mirroring the logical volume?,plz provide me the steps by details.
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тАО03-26-2011 11:55 AM
тАО03-26-2011 11:55 AM
Re: mirroring logical volume
You can simply mirror your logical volume now. This is often done when filesystems are mounted and in-use. Simply do:
# lvextend -m 1 /dev/vgNN/lvol11
...or if you want to target a particular disk:
# lvextend -m 1 /dev/vgNN/lvol11 /dev/dsk/cXtYdZ
Regards!
...JRF...
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тАО03-26-2011 01:43 PM
тАО03-26-2011 01:43 PM
Re: mirroring logical volume
thanks for yr reply, but i have mirroring the boot disk, what is prefered to do?
# lvextend -m 1 /dev/vg00/lvol11
# lvextend -m 1 /dev/vg00/lvol11 /dev/dsk/cxtYdZ
bitou
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тАО03-26-2011 02:44 PM
тАО03-26-2011 02:44 PM
Re: mirroring logical volume
> but i have mirroring the boot disk, what is preferred to do?
In my opinion it never hurts to be explicit.
# lvextend -m 1 /dev/vg00/lvol11 /dev/dsk/cxtYdZ
...where 'cXtYdz' is the disk on which you want to create the mirror.
Regards!
...JRF...
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тАО03-27-2011 10:04 PM
тАО03-27-2011 10:04 PM
Re: mirroring logical volume
As JRF has rightly mentioned, it doesn't hurt to be "specific" but just in case you have only one boot disk and that contains all your essential O.S lvols and one extra P.V in that V.G and you have the default allocation policy... there is pretty much only one place that lvol go. However, it is always best to have less than three disks in your root volume group.
Regards
Ismail Azad
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тАО03-28-2011 01:42 AM
тАО03-28-2011 01:42 AM
Re: mirroring logical volume
Logical volumes in root VG has been allocated with strict policy. Strict policy will not allow to sit the mirror extents on the same disk. If you have more than 2 disk in your VG, then specify the pv path, else you can do without specifying the pv path.
Rgds...
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тАО03-29-2011 10:35 PM
тАО03-29-2011 10:35 PM
Re: mirroring logical volume
#lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c1t0d0
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тАО03-29-2011 11:23 PM
тАО03-29-2011 11:23 PM
Re: mirroring logical volume
Hope this helps!
Regards
Torsten.
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тАО03-30-2011 05:26 AM
тАО03-30-2011 05:26 AM
Re: mirroring logical volume
Unix operates with beer.
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тАО03-31-2011 12:11 AM
тАО03-31-2011 12:11 AM
Re: mirroring logical volume
Just run the below commands and it is done
# lvextend -m 1 /dev/vg00/lvol1
# lvlnboot -b /dev/vg00/lvol1 /dev/vg00