Drive lifecycle state descriptions and troubleshooting

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ONLINE
The normal state that most disks are in for most of their life. This state indicates that the disk is functioning normally and that all data operations are supported on the disk.
INIT
The disk state shows Initializing when the disk is formatting or reformatting. When complete, the disk changes state to ONLINE unless a disk health issue is detected.
OFFLINE
If a disk is physically removed or undetected by the system due to inconsistent hardware state, its state changes to OFFLINE. In an OFFLINE state, read and write operations to the disk are not supported. Missing slices that were written to the system while the disk was OFFLINE are rebuilt on the disk.
DIAGNOSTIC
MIGRATING
A disk is reported as MIGRATING after a DIAGNOSTIC disk is manually failed. After a disk is marked as MIGRATING, data migration begins. Data migration moves data from the MIGRATING disk to neighboring drives. This process reduces the amount of data that needs to be rebuilt when the disk is replaced. The disk is permanently removed after all data is migrated.
UNUSABLE
A disk can change to an UNUSABLE state if the OS fails to initialize the disk on startup or when the disk is inserted into the Slicestor® device.
FOREIGN
A disk can be reported as FOREIGN if it is removed from one Slicestor device and inadvertently placed in a different Slicestor device. I/O operations are not allowed on a FOREIGN disk.
UNKNOWN
UNKNOWN state is reported when the disk returns an unexpected message.

Parent topic: Monitoring the system