alter diskgroup <dg_name> add disk <path..> ## new luns drop disk <asmdisk_name...> ## old asmdisk rebalance power 9 wait;
The UNIX Team can migrate the LVM (mounted) volumes with LVM commands on the fly...Yes, he can do that you have to check if it can be done without downtime, because trough ASM you can do it without downtime. This is like a "dd" command will copy bock by block, after finish the mirroring the Lun data must be the same as source including header.
Levi Pereira wrote:>
Or:At one of my previous employers, we used this method to move 250TB+ worth of storage from one vendor to another - Works GREAT!!! especially if you have a LOT of HBA's and multipathing that actually works... (like on a SUN 6900 with 8 HBA's) Except - we did NOT use the WAIT parameter. The thing ran in the background for 27days. Oracle said: "theoretically it should work - but we have never tried it on something that big". We did - IN PRODUCTION. Oh, we were also loading 1TB/day while it was running.
1 Set rebalance power of 0 for diskgroup
2 Add New Luns
3 Drop Old Luns
4 Set rebalance power to 9 for diskgroup with "wait" option
5 Wait rebalance process finish, so you can remove the old Luns