SELECT name, state, type, total_mb, free_mb, required_mirror_free_mb FROM v$asm_diskgroup;
When this error is triggered, it often coincides with other critical events: Disk Group Dismounting asm health checker found 1 new failures
Here is a story of a "typical" Friday night in the life of a Database Administrator (DBA) facing this error. The Friday Night Ghost in the Machine required_mirror_free_mb FROM v$asm_diskgroup
Then restart the ASM instance or reload udev: When this error is triggered
If the failure is related to "Insufficient Space," rebalance the disk group or add new disks immediately.