Undrop Disk from Diskgroup

Note: To undrop a disk, the header_status from v$asm_disk view must be dropping. You cannot undrop a completely dropped disk.

Instance: ASM Instance
Privilege: Sysdba

Syntax

ALTER DISKGROUP [ALL/diskgroupname, diskgroupname..] UNDROP DISKS

Example 1

SQL> Alter Diskgroup asmdata undrop disks;

Example 2

SQL> Alter Diskgroup ALL undrop disks;

Thanks