Nothing Like The SAN

The Fiber-Channel protocol allows an HBA to be notified when a new LUN is seen on the SAN.
The Fiber-Channel HBA reports LUN events to the SCSI mid-layer as soon as it sees them - hence, plug&play.
It also notifies the SCSI mid-layer when LUNs are deleted.
On drawback - if a RAID gets disconnected from the Fiber-Channel network, even for a few seconds, a similar event propagates and the device is immediately removed from the system.
As a result - such events will cause I/O errors on the device.

Originally written by