Compex Systems Advanced SerialRAID Adapters SA33-3285-02 - Manual (Page 41)

SSA Unique IDs
Each SSA device has a specific identifier that is not used by any other SSA device in
the whole world. This identifier is called the IEEE SSA Unique ID (UID) of the device. It
is written into the device during manufacture.
The full UID consists of 16 characters. The label on the side of a disk drive shows the
full UID. The label on the front of a disk drive shows the serial number of the disk drive.
The serial number is actually part of the UID. Also part of the UID, the Connection
Address consists of the LUN name and the device-type identifier. The software uses
this information to access the device.
Full UID 0000XXXXXXNNNNNN
Disk drive serial number XXNNNNNN
Connection Address XXXXXXNNNNNNLLD
where:
XXXXXX = IEEE Organization Identifier (manufacturer)
NNNNNN = Product / ID (assigned unique number)
LL = LUN (always 00 for a LUN device)
D = Device type:
(D for an SSA Physical disk drive)
(E for a fast-write logical disk)
(F for a RAID-0 array)
(K for a RAID-5 array)
You might need to know the UID of a disk drive if you want to use the mkdev
command to give that disk drive a specific hdisk number.
Chapter 2. Introducing SSA Loops 21