Drive states
System Manager reports various states for drives.
Accessibility states
| State | Definition | 
|---|---|
| Bypassed | The drive is physically present, but the controller cannot communicate with it on either port. | 
| Incompatible | One of the following conditions exists:
  | 
| Removed | The drive has been improperly removed from the storage array. | 
| Present | The controller can communicate with the drive on both ports. | 
| Unresponsive | The drive is not responding to commands. | 
Role states
| State | Definition | 
|---|---|
| Assigned | The drive is a member of a pool or volume group. | 
| In-use hot spare | The drive is currently being used as a replacement for a drive that has failed. Hot spares are used only in volume groups, not pools. | 
| Standby hot spare | The drive is ready to be used as a replacement for a drive that has failed. Hot spares are used only in volume groups, not pools. | 
| Unassigned | The drive is not a member of a pool or volume group. | 
Availability states
| State | Definition | 
|---|---|
| Failed | The drive is not working. The data on the drive is not available. | 
| Impending Failure | It has been detected that the drive could fail soon. The data on the drive is still available. | 
| Offline | The drive is not available for storing data usually because it is part of a volume group that is being exported or it is undergoing a firmware upgrade. | 
| Optimal | The drive is working normally. | 
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