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Originally Posted by
pobman
I have been thinking this over the local server is currently setup with 4 x 72GB disks and 2 mirrors. I would like to set the DR server up with the 2 x 146GB disks as a mirror, this will give me a 146GB disk or so.
This is possible. The LVM (logical volumen manager) will take care of the differences between 4x72GB and 2x146GB.
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I will then need to restore my Data from mksysb to the mirror and have rootvg and datavg on the same disks.
I think there is a misunderstanding: a mksysb image is always an image of the rootvg and nothing else. In fact it is some logic to setup up the machine during an initial boot followed by a "savevg rootvg" output, which comprises most of the mksysb image. So, when you restore the mksysb you will have only the rootvg, nothing more. This will include all the settings, users, groups, queues, etc., because all this is stored in rootvg files. But the data stored in filesystems from the datavg won't be included.
Another point is: a disk can only be used by one and exactly one VG. You might want to read
this thread for some explanation of Logical Volume Manager concepts. I know, this is far from being complete - i am working on a more thorough introduction, but its far from being presentable.
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Do you have any newbie AIX guides?
If you have a good knowledge of other UNIX (or UNIX-like) dialects you might want to consult the
UNIX rosetta stone.
I hope this helps.
bakunin