-lun used to address the device. Once this is done, the SCSI mid layer
-can be informed of changes to the virtual SCSI bus which the driver
-presents to it in the usual way. For example:
-
- echo scsi add-single-device 3 2 1 0 > /proc/scsi/scsi
-
-to add a device on controller 3, bus 2, target 1, lun 0. Note that
-the driver makes an effort to preserve the devices positions
-in the virtual SCSI bus, so if you are only moving tape drives
-around on the same adapter and not adding or removing tape drives
-from the adapter, informing the SCSI mid layer may not be necessary.