Linux And SCSI Hotplug

• Until recently, Linux's SCSI disk layer discovered new devices when the HBA driver was loaded into memory.
• For normal usage that means only during system boot.
• In a SAN Environment, disks are added without shutting servers down. Thus, we want to discover new SCSI disks without a reboot.
• In kernel 2.6.12, the SCSI disks layer was given the ability to discover new disks in a plug&play manner.

Originally written by guy keren