From: thad@public.BTR.COM (Thaddeus P. Floryan)
Newsgroups: comp.periphs.scsi
Subject: Re: Archive150MB Tape - JUMPERS
Keywords: archive, jumpers
Date: 27 Mar 92 13:39:55 GMT
Organization: BTR Public Access UNIX, Mountain View CA

In article <1992Mar25.022120.15723@oneb.wimsey.bc.ca> root@oneb.wimsey.bc.ca (Ken McVay) writes:
>I've been blessed with the long-term loan of an Archive SCSI tape drive -
>a 150-meg internal unit. As I have two disks on the Adaptec 1542b bus now,
>and no manual for the tape drive, I'd appreciate some help with the jumper
>settings. The hard disks are set as ID 0 and 1, respectively, so the tape
>needs to be set somewhere else... According to a physical check of the
>board, the 12 jumper pairs available are labelled as shown below.
>[...]

Y'know, a LOT of people have problems configuring the Archive 2060S/2150S
drives.  So I ran a test at my office.

I pulled one drive and all its jumpers, and asked a buncha people to configure
the drive for PARITY, 16K buffer, and SCSI ID=6.  And gave them a copy of the
"cheatsheet" which I've posted to this newsgroup numerous times before (and
again, appended to this post).

Of 20 people, only three configured the drive correctly (two people in my
computer center, and my secretary).

I asked the 17 others "Why?", and they said they thought my diagram was
wrong and they looked at the silkscreened lettering on the underside of the
drive's PC board.

Hmmm.

So I held the drive sideways, and showed them how the jumpers actually "map"
to the silkscreened lettering, and 15 said "Oh, now I get it!" (and they did
acknowledge my "cheatsheet" was, in fact, correct! :-)

The two remaining people who still couldn't understand the jumpers seem to
suffer problems with spatial conceptualization (my opinion).

So, to aid understanding of the Archive jumpers, I've put together a second
"cheatsheet" which seems to have helped most people; I've appended it below.

And, no, I don't work/consult for Archive, I just happen to have a *LOT* of
their products because I'm satisfied with their reliability and performance.

Thad Floryan [ thad@btr.com (OR) {decwrl, mips, fernwood}!btr!thad ]

-------------------- begin enclosure 1

                 HOW TO UNDERSTAND THE JUMPER ORIENTATION

  Rear side view of the 2060S/2150S      Left rear view of the 2060S/2150S

    __________  SER/CF2/ID2 jumpers    |  o o   o o   o o   oooooooo ooooo...
   |  ________  DIA/CF1/ID1 jumpers    |  o o   o o   o o
   | |  ______  PEN/CF0/ID0 jumpers    |  o o   o o   o o   :::::::SCSI conn.
___|_|_|______                         |__________________________________...
###|#|#|######  PC board               |##################################...

        ^ ^ ^   lef/mid/rig                ^     ^     ^   top/mid/bot
        | | |                              |     |     |
        | | |__ PEN/CF0/ID0 labels         |     |     |__ ID2/ID1/ID0 jumpers
        | |____ DIA/CF1/ID1 labels         |     |________ CF2/CF1/CF0 jumpers
        |______ SER/CF2/ID2 labels         |______________ SER/DIA/PEN jumpers


-------------------- begin enclosure 2

		 Viper 2060S and 2150S hardware setup


Hardware setup amongst the 9 sets of jumpers includes:

	SCSI ID:	3 sets of jumpers
	Serial:		this should NOT be set
	Diagnostic:	this should NOT be set
	Parity Enable:	setting depends on your interface; either EVERYTHING
			or NOTHING on the bus should be checking parity.
	Buffer Disc:	3 sets of jumpers select 2, 4, 6, 8, 12, 16, 24 and
			32K buffer sizes.  Factory default is 16K.  This is
			the number of bytes transferred over the bus in a
			single operation.  A mininum of 16K is required for
			the SCSI "COPY" command.


Where to find all this at the back of the drive:

	[OOOO]	TTTTTTTT TTTTTTTT TTTTTTTT
	 [JJ]	SSSSSSSSSSSSSSSSSSSSSSSSSS

	Where:	[OOOO]	is the power connector
		 [JJ]	is the jumper block
		TTTTTT	are the three 8-pin terminators
		SSSSSS	is the 25x2 SCSI connector

	The jumper block looks like this (in the orientation as above):

	[ SERIAL ]	[  CF2	]	[  ID2	]
	[  DIAG. ]	[  CF1	]	[  ID1	]
	[ PARITY ]	[  CF0	]	[  ID0	]

	SERIAL: no jumper
	DIAG:	no jumper
	PARITY: jumper to enable

	============================= BUFFER ==============================

	SIZE:	2K	4K	6K	8K	12K	16K	24K	32K

	CF2:	o o	o o	o o	o o    [o=o]   [o=o]   [o=o]   [o=o]
	CF1:	o o	o o    [o=o]   [o=o]	o o	o o    [o=o]   [o=o]
	CF0:	o o    [o=o]	o o    [o=o]	o o    [o=o]	o o    [o=o]


	============================= SCSI ID =============================

	ID:	 0	 1	 2	 3	 4	 5	 6	 7

	ID2:	o o	o o	o o	o o    [o=o]   [o=o]   [o=o]   [o=o]
	ID1:	o o	o o    [o=o]   [o=o]	o o	o o    [o=o]   [o=o]
	ID0:	o o    [o=o]	o o    [o=o]	o o    [o=o]	o o    [o=o]

	===================================================================

-------------------- end of enclosures