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тАО08-06-2003 06:18 AM
тАО08-06-2003 06:18 AM
Hi all,
I'm new to hpux and i wonder if it matters if i mirror an lvol before creating a filesystem on it.
Thanks in advance
I'm new to hpux and i wonder if it matters if i mirror an lvol before creating a filesystem on it.
Thanks in advance
Solved! Go to Solution.
3 REPLIES 3
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тАО08-06-2003 06:21 AM
тАО08-06-2003 06:21 AM
Solution
Hi Christophe,
No, it doesn't really matter.
But you definitely want to mirror prior to putting data on it.
The more data in the LV, the longer the initial mirror will take.
Rgds,
Jeff
No, it doesn't really matter.
But you definitely want to mirror prior to putting data on it.
The more data in the LV, the longer the initial mirror will take.
Rgds,
Jeff
PERSEVERANCE -- Remember, whatever does not kill you only makes you stronger!
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тАО08-06-2003 06:24 AM
тАО08-06-2003 06:24 AM
Re: Lvextend -m question
lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c#t#d0
use a real dsk device.
I'd have the mirror set up before I use the logical volume if possible.
SEP
use a real dsk device.
I'd have the mirror set up before I use the logical volume if possible.
SEP
Steven E Protter
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http://hpuxconsulting.com
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тАО08-06-2003 06:24 AM
тАО08-06-2003 06:24 AM
Re: Lvextend -m question
Hi,
it does not matter at all.
It in the underlying level, and the fs isn't aware of the existance of the mirror, anyway.
Just a suggestion.
The best way to do mirroring is
lvcreate -n lvolXX vgXX /dev/dsk/c1t2d3 (create at 0 size !)
lvextentd -m 1 /dev/vgXX/lvolXX /dev/dsk/c2t2d3 (mirror the 0 sized lvol)
lvextend -l dimension_you_want /dev/vgXX/lvolXX
(extend the mirrored lvol)
In this way you have no time spent uselees.
If you first create the lvol at full size and after increase it, you will have to wait a lot....
Massimo
it does not matter at all.
It in the underlying level, and the fs isn't aware of the existance of the mirror, anyway.
Just a suggestion.
The best way to do mirroring is
lvcreate -n lvolXX vgXX /dev/dsk/c1t2d3 (create at 0 size !)
lvextentd -m 1 /dev/vgXX/lvolXX /dev/dsk/c2t2d3 (mirror the 0 sized lvol)
lvextend -l dimension_you_want /dev/vgXX/lvolXX
(extend the mirrored lvol)
In this way you have no time spent uselees.
If you first create the lvol at full size and after increase it, you will have to wait a lot....
Massimo
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