Enumeration describing how a drive can be started/stopped.
Unknown or drive doesn't support start/stop.
The stop method will physically shut down the drive and e.g. power down the port the drive is attached to.
The start/stop methods are used for connecting/disconnect to the drive over the network.
The start/stop methods will assemble/disassemble a virtual drive from several physical drives.
The start/stop methods will unlock/lock the disk (for example using the ATA <quote>SECURITY UNLOCK DEVICE</quote> command)