Even if there is a way to do a live migration, it's probably faster and safer to just build a new raid with or without lvm and copy the stuff over. You'll just have to reinstall grub on the new disks to make them boot.
It needn't be live, I just haven't seen an app like clonezilla that can go big to small with lvm and md devices...
On that note, the data is all static so it's very safe:
1. I wonder if I actually could place the two new discs in 2. create two new md devices, md2/3 3. pvmove VolGroup00 into it md3, then pvremove md1's pv's, ignore the md1->3 difference here, lvm should find the unchanged vg/lv. 4. copy md0's /boot into md2 5. edit fstab for the new /boot on md2 instead of md0 6. install grub 7. have local guy pull out two old drives and send back.
I don't have a concern about data, it has a long kickstart which actually sets everything up, it's just downtime I want to avoid.
Should work:)