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Can We Move Datafiles To New ASM Diskgroup With Different AU Size? (Doc ID 1480395.1)

Last updated on NOVEMBER 08, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 10.2 to 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.


Current ASM diskgroup has AU size of 1 MB. New ASM diskgroup has a different AU size of 4 MB. Can we move datafiles to a new ASM diskgroup with different AU size?

For example, use RMAN to copy datafile to the new diskgroup, then rename, switch, recover datafiles to migrate to the new disk group.
The key concern here is if we can relocate datafile to a new ASM disk group with different AU size, is there any potential risk?


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