We have EMC CLARiiON disks that are near their end of support, so we need to move Oracle ASM disks to a new sets disks. We are trying to minimize the database down time, so I am trying to find ways to use ASM mirroring or disk clone method to move current databases on ASM old disks to new ones.
If our databases were on the file system, we could use the disk mirror/clone to copy the data files on the file system to new disks. We could then open the database on new disks with ease. But Oracle ASM disks are different than file systems.
Any suggestions or references will be very much appreciated.
Best Answer
Why not just create luns on the new storage, with same size as on old storage and add them to the existing disk groups. Next drop the old disks from the disk group and when the re-balance is over, your system is migrated to the new storage, without any downtime.
Works like a charm. ASM is way smarter than a filesystem.