SCSI disk numbering

[Benson I. Margulies]

The disk driver numbering situation is not as bizarre as it looks.  Look
at sd(4) and GENERIC. The scheme is there. Internal disks are sd2 and sd6.
Why? sd 0/1 is the standard numbering in plain old sun shoeboxes, and they
want you to be able to plug them in trivially.

The 8 and 18 are the "slave" numbers, composed by (SCSI-ID*8)+SCSI-LUN.

Now, if some of these Wren's and MaxStors would only come with LUN
switches as well as ID switches, one could make a real disk farm.