Thanks to the following for prompt replies to my request:
Fedor Gnuchev, Mickey Panayiotakis, Jim Harmon, and Doug Purdy
From the proffered advice, I decided to try the following
jumper settings on my new ST31051N drive in an old SparcStation 2:
a. On jumper block J6, I jumpered 5 & 6 to give a SCSI ID
of 3 so that this will be the new root disk.
b. On jumper block J2, I made the following settings:
1- don't care if jumper 8 is out.
2- don't care if jumper 8 is out.
3- jumper out.
4- jumper out for parity enabled.
5- jumper out for read/write.
6- jumper in for use in Sun workstation.
7- jumper out.
8- jumper out for no termination.
These jumper settings seemed to work. The disk spun up, formatted
and seems to run fine.
Mike Mitchell
mitchell@radonc.unc.edu
Original question:
>
> Folks-
>
> I'm about to install a Seagate Hawk ST31051N drive into a
>SparcStation 2 as the new root drive and need help with the jumper
>settings. I've been to the Seagate WWW site and have a print-out
>of the specs for this drive, but am still a little confused. I'd
>appreciate any help I can get. Could some kind SysAdmin write and
>confirm that I'm setting up this correctly or else put me straight?
>
> The first part I think is easy. Since I want the drive to be SCSI ID 3,
>I think that I should jumper #s 5 and 6 in the figure below with the
>"normal size" little jumpers.
>
> +------------+
> | FRONT VIEW | (ST-31051N)
> +------------+
> +--+Reserved. Shipped with cover installed.
> | +Do not remove. Do not install jumpers
> TOP (HDA) ++---+ 1
> --P-W-A---------------------+::::|::::::+--
> * BOTTOM +----+123456
> | J6 ||||||
> LED -+ ||||||
> Remote LED +||||+ ID 1
> (pin-11 +5v) |||+- ID 2
> Reserved -+++-- ID 4
>
>What I'm confused about is the jumper block #2 on the "right" side of the
>unit. This jumper block appears to take very small little jumpers that
>I'm going to have to find somewhere. There are no obvious places to stick
>in any resistor packs so I'm assuming that I have to set things correctly
>on J2 to get proper termination.
>
>I'm thinking at this point that what I want to set is:
>
> a. Option C under "Termination Power-source Table" because I don't
> want any termination on the drive.
>
> b. Jumper #6 to select Motor Start.
>
> c. Leave out #4 to have parity enabled.
>
> d. I haven't a clue about what "Enable T-Res is about. Is this
> involved in termination? Is this "terminal resistance" on the
> bus?
>
> +-----------------+
> | RIGHT SIDE VIEW | (ST-31051N)
> +-----------------+
>
> BACK +-+ J2 12345678 TOP (HDA) FRONT
> OF J1+----------------------P-W-A----------------------- OF
> DRIVE +-+ :::::::: BOTTOM DRIVE
> ||||||||
> |Terminator Power +||||||+ Enable T-Res
> ++Terminator Power -+||||+- Start Delay (12 secs * ID)
> | Reserved --+||+-- Motor Start
> | Parity Disable ---++--- Write Protect
> |
> |
> | +--------------------------------+
> +-+ Termination Power-source Table |
> +--------------------------------+-------------+
> |-----....-----....-----PWA edge----- |
> | |
> | 1 2 1 2 1 2 |
> | +-+ +-+ +---+ A Drive Supplies Bus |
> | |0|0 0|0| +0-0+ B Drive Supplies Own |
> | +0+0 0+0+ 0 0 C Bus Supplies Drive |
> | A B C |
> +---------Default------------------------------+
>
>As a plan B, I would try setting things as follows:
>
> a. Option B under "Termination Power-source Table"
>
> b. Jumper #6 to select Motor Start.
>
> c. Leave out #4 to have parity enabled.
>
> d. Leave out #8 assuming that T-Res means "resistance for
> terminal SCSI device."
>
> Thanks in advance for any help.
>
> Mike Mitchell
> mitchell@radonc.unc.edu