Copy SSA VG to EMC Symmetrix 8000

[comtec17]

Hello all!
I am currently in the process of adding some EMC SAN disk to 3 of my AIX 4.3.3 servers. My current data/VG/LV/FS reside on SSA disk which I will be retiring after the EMC is in place.

Now off to my question:

My current AIX server has 2 VG's. One of them is rootvg, but it is staying on local disk. My other VG is on SSA. My VG on SSA contains 9 LV's rangeing in size. I am only currently using about 10% of each LV and want to reduce them. I know that there is a command called "lreducevg" that is unsupported by IBM and there are some serious risks, so with that said I dont want to do that.

The reason for reducing the sizes of the LV's is due to the EMC disk that is being created is smaller than what I currently have assigned. I would like to do a VGMirror or an LVMirror to the new disk.

Can I mirror the VG and LV's to disk smaller than that of the current SSA disk? I would like to copy this data over the the new disk using the same VG names and LV names. I am looking for the easiest, most reliable to do this. I will export the old VG when the mirror/restore/copy of it is complete and disconnect my SSA and have it as a standby.

To sum up my questions:

What is the best method of mirroring/copying my current VG to a set of new PV's that are smaller?

Thanks in advance and sorry about rambling on.

CoMteC17

 

[eskolnik]

The hard part of all this is reducing the LV's, I dont know if there is really any easy way to do that. I would just define new VG's LV's and file systems, then copy the data.

You could rename the filesystems back to the old names after you were done.

ed

Ed Skolnik