disk_repair_time parameter is used to do following
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a. Specifies the repair time in hours for any failed disk
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b. The amount of time a disk can remain offline before it is dropped by Oracle ASM
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c. The amount of time a disk will remain on-line if there is any fault
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None of the above
The disk_repair_time parameter in Oracle ASM specifies how long a disk can remain offline before ASM drops it from the disk group. This is a protection mechanism that prevents permanent disk removal during transient failures. It is measured in hours and applies to disks that go offline, not to repair time specification or disk online behavior during faults.
Correct answer: The amount of time a disk can remain offline before it is dropped by Oracle ASM.
In Oracle Automatic Storage Management (ASM), the disk_repair_time attribute (set on a disk group) specifies how long a disk can stay offline (e.g., due to a transient failure) before ASM gives up waiting for it to come back and permanently drops it from the disk group, triggering a rebalance. This lets ASM tolerate brief outages without an expensive full drop/re-add.
It does not specify a repair duration for a failed disk in general terms, nor does it describe how long a disk stays online during a fault — both of those misstate the direction and purpose of the parameter, which is specifically about tolerating an offline window before dropping the disk.