From: mike@ra.cs.umb.edu (Michael J. Thibodeau)
Newsgroups: comp.periphs.scsi
Subject: How do I connect a sun shoebox to a Personal DEC station 5000/20
Date: 14 Aug 92 17:51:47 GMT
Article-I.D.: cs.1992Aug14.175147.4132
Organization: University of Massachusetts at Boston, Dept of Math and CS


    please bear with me if this is a repost, I sent this about a week ago and
    haven't seen anythin of it yet.

Hi
	I am trying to attach a sun shoebox blah-blah to a personal DEC station
	5000/20 and am having no luck.

	Here are the particulars:

	o shoebox: sun micropolis 85meg shoebox is model# 511
	  it is being externally terminated.

	o DEC station: personal DEC station 5000/20 with an internal DEC hard
	disk mounted on rz2, ram is maxed out at 40MB.

	o Unison 1.3gig External hard disk
	  mounted on rz6
	  the scsi id on the drive is 3 but the decstation refers to it as scsi
	  id 6

The problem is that the DECstation will not recognize the shoebox and therefore
I cannot boot it

All tests are done in single user mode since the DEC stalls each time it tries
to access the "new" disk.

here are the various configurations that I have tried:

1 ) As it stands normally, the decstation with internal harddisk and an
external UNISON 1.3gig harddisk terminated externally on the UNISON.
The SCSI ID on the UNISON is set at 3.

I have numbered the lines for easy reference.

  >>cnfg 3
1	
2	3:KN02-CA	DEC	v2.0m	TCFO	(40MB)
3						(DV --d=8)
4						(Sb:devs = 2)
5		Name		Rev.		Vendor
6	   =================================================
7	   VSXXX-BB		AV1.0		DEC
8	   LK501-AA		AV1.0		DEC
9						
10					     (FDI: 0)
11					     (enet: our enet address)
12					     (SCSI= 7)
13	--------------------------------------------------------------
14		DEV	PID		VID	REV	SCSI DEV
15	       ====	==============	======	======	=============
16	       rz2	RZ25	(c)DEC	DEC	0700	DIR
17	       rz6	1908-15MZ1077801MICROP	HZ2P	DIR
18	
19	
20	
21	dcache (64KB),	icache (64KB)
22	mem(0):	a0000000: a0ffffff	(16MB)
23	mem(1):	a1000000: a1ffffff	(16MB)
24	mem(B):	a2000000: a27fffff	(8MB)
25	


2 ) no external devices, terminated at ds1(the DecStation)

... same as above but without line 17. this refers to the UNISON.


3 ) with the shoebox, terminated at the shoebox.
   a) SCSI id = 0
   cnfg 3 hangs after line 15. 

   b) SCSI id =1
   cnfg 3 hangs after line 15.

   c) SCSI id = 2
   during reboot..
     unexpected inconsistency; run fsck manually
     couldn't open character device for /dev/rz6d
					/dev/rz6a
					/dev/rz6e
     restarts reboot 
     and does the same thing.

   after stopping the reboot manually 
   cnfg 3 hangs after line 15

   d) SCSI id = 3
   reboot:
    SCSI BUS 0: parity error(#0) ID = 3

   cnfg 3 hangs after line 15.

   e) SCSI id = 4
   reboot:
    SCSI BUS 0: parity error(#0) ID = 4

   cnfg 3 hangs after line 15.

   f) SCSI id = 5
   reboot:
    SCSI BUS 0: parity error(#0) ID = 5

   cnfg 3 
     gives normal results minus line  17

   g) SCSI id = 6
   reboot:
    SCSI BUS 0: parity error(#0) ID = 6

   cnfg 3 hangs after line 15.

   h) SCSI id = 7
   reboot:
    SCSI BUS 0: parity error(#0) ID = 0

   cnfg 3 hangs after line 15.

4 ) with ds1, the shoebox, then the UNISON. terminated at the UNISON

On bootup all seems ok but then this:

	SCSI Bus 0: command abortede (#0) ID = 6 cmd 0x8
	SCSI Bus 0: resetting Bus (#2)
 and it starts the boot over again.

cnfg 3
.. normal follow through with all lines present but doesn't add a line for the
shoebox.

Can anyone give me some direction as to where to go from here?

Does the fact that the shoebox is not being terminated internally with the
resistors but is externally being terminated on the free SCSI port have
something to do with it?

-mike@cs.umb.edu