Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!hplabs!hp-ses!hpdml93!bpenteco
From: bpenteco@hpdml93.HP.COM (Bob Pentecost)
Newsgroups: comp.periphs
Subject: Re: SCSI-II ID limits
Message-ID: <520001@hpdml93.HP.COM>
Date: 15 Jun 89 21:08:34 GMT
References: <4589@ihuxz.ATT.COM>
Organization: Hewlett Packard - Boise, ID
Lines: 16

/ hpdml93:comp.periphs / terryk@xenna.Encore.COM (Terence Kelleher) /  2:42 pm  Jun 14, 1989 /
In article <3170007@hprnd.HP.COM> kc@hprnd.HP.COM (Kurt Chan) writes:
>>> Has the SCSI-II std group decided how many hosts and targets
>>> I can put on the bus?  
>>
>>Sub-luns are out - leaving the same old 8 devices, 8 logical units per device.
>>The maximum single-initiator system therefore consists of the initiator and
>>up to 56 logical units spread across 7 targets (physical addresses).
>>
>As of the August 1988 draft, revision 5, of SCSI-II, the EXTENDED
>IDENTIFY message was still supported.  This allows up to 2048 (256
>sub-logical units per LUN).  Was this axed in a later draft?  Not that
>I would miss it, but I am curious.
>---------

Yes, the EXTENDED ID was deleted.  I can't recall the exact reasons.