Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!cs.utexas.edu!rice!sun-spots-request
From: benson@odi.com (Benson I. Margulies)
Newsgroups: comp.sys.sun
Subject: SCSI disk numbering
Keywords: Hardware
Message-ID: <4236@brazos.Rice.edu>
Date: 30 Dec 89 21:05:16 GMT
Sender: root@rice.edu
Organization: Sun-Spots
Lines: 9
Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 9, Issue 5, message 14 of 19

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.