MISSING - Automatic Storage Management metadata indicates that the disk is known to be part of the Automatic Storage Management disk group, but no disk in the storage system was found with the indicated name

CLOSED - Disk is present in the storage system but is not being accessed by Automatic Storage Management

OPENED - Disk is present in the storage system and is being accessed by Automatic Storage Management. This is the normal state for disks in a database instance which are part of a Disk Group being actively used by the instance.

CACHED - Disk is present in the storage system, and is part of a disk group being accessed by the Automatic Storage Management instance. This is the normal state for disks in an Automatic Storage Management instance which are part of a mounted disk group.

IGNORED - Disk is present in the system, but is ignored by ASM because of one of the following:

- The disk is detected by the system library, but is ignored because an ASM library discovered the same disk

- ASM has determined that the membership claimed by the disk header is no longer valid

CLOSING - ASM is in the process of closing this disk

UNKNOWN - Automatic Storage Management disk header has not been read

CANDIDATE - Disk is not part of a disk group and may be added to a disk group with the ALTER DISKGROUP statement

INCOMPATIBLE - Version number in the disk header is not compatible with the Automatic Storage Management software version.

PROVISIONED - Disk is not part of a disk group and may be added to a disk group with the ALTER DISKGROUP statement. The PROVISIONED header status is different from the CANDIDATE header status in that PROVISIONED implies that an additional platform-specific action has been taken by an administrator to make the disk available for Automatic Storage Management.

MEMBER - Disk is a member of an existing disk group. No attempt should be made to add the disk to a different disk group. The ALTER DISKGROUP statement will reject such an addition unless overridden with the FORCE option

FORMER - Disk was once part of a disk group but has been dropped cleanly from the group. It may be added to a new disk group with the ALTER DISKGROUP statement.

CONFLICT - Automatic Storage Management disk was not mounted due to a conflict

FOREIGN - Disk contains data created by an Oracle product other than ASM. This includes datafiles, logfiles, and OCR disks.

UNKNOWN - Automatic Storage Management disk mode is not known (typically the disk is not mounted)

ONLINE - Disk is online and operating normally. Reads and writes are attempted.

OFFLINE - Disk is offline and access to data is not permitted. Reads and writes are not attempted. An offline disk remains logically part of its disk group.

UNKNOWN - Automatic Storage Management disk state is not known (typically the disk is not mounted)

NORMAL - Disk is online and operating normally

ADDING - Disk is being added to a disk group, and is pending validation by all instances that have the disk group mounted

DROPPING - Disk has been manually taken offline and space allocation or data access for the disk halts. Rebalancing will commence to relocate data off the disks to other disks in the disk group. Upon completion of the rebalance, the disk is expelled from the group.

HUNG - Disk drop operation cannot continue because there is insufficient space to relocate the data from the disk being dropped

FORCING - Disk is being removed from the disk group without attempting to offload its data. The data will be recovered from redundant copies, where possible.

DROPPED - Disk has been fully expelled from the disk group

UNKNOWN

UNPROT

MIRROR

PARITY