as2d+@andrew.cmu.edu (Alan Henry Stein) (07/11/89)
Departing from the discussion on transfer rates: What floppy drives does the ST02 support?? 360/1.2/720/1.44??? How many drives 1/2/4??? Anyone out there running a Seagate 177N with either controller (48meg 3 1/2") Any comments (I have only a 3 1/2 drive slot free so I need the small drive). alan
bmw@isgtec.UUCP (Bruce Walker) (07/14/89)
Anyone interested in using the ST01/2/E50 SCSI boards from Seagate
should call up their local Arrow office (electronics disti's) and
ask for the "ST01, ST02 SCSI HOST ADAPTER PRODUCT MANUAL"
(No. 36027-002 Rev G).
In there you'll learn that the ST02 supports:
o 5.25 at 360K and 1.2M
o 3.5 at 720K and 1.44M
NOTES FOR EXPERIMENTORS
These boards are cheap! An ST01 is $35 (Can., w/taxes).
By playing with an ST01-A board I have discovered that if you boot
your PC while nothing is connected to the SCSI bus, the SCSI BIOS
complains that it has failed self-test and hangs! The only solution
to this appears to be to remove the BIOS ROM. The ST01 card has no
terminating resistors so the SCSI bus floats; this must be bugging
the BIOS.
The reason why this concerns me is that I am going to be using these
things for tape backup purposes -- a lot of the time there will be
nothing connected to the SCSI port.
There is also a version of the board called the ST01-E50. This has
an external connector and terminating resistors. This is about
$45 (Can.). I figure that's the way I should go for tapes.
BUG in DOCS: On page 2-7 of the manual, section 2.5.9 "Status Register"
bit 0 is called "SCSI RST". This is wrong. It is
really "SCSI BSY" (See also Appendix E-9). This makes a BIG difference.
This is very nice board to program. I have a home-made NCR5380
SCSI board from a few years ago, and I can tell you that the chip
on this board is much less complicated to use.
--
Bruce Walker ...uunet!mnetor!lsuc!isgtec!mutant!bmw
"Better Living Through Connectivity" ...utzoo!lsuc!isgtec!mutant!bmw
ISG Technologies Inc. 3030 Orlando Dr. Mississauga. Ont. Can. L4V 1S8yon@apollo.COM (David Yon) (07/19/89)
In article <111@isgtec.UUCP>, bmw@isgtec.UUCP (Bruce Walker) writes: >By playing with an ST01-A board I have discovered that if you boot >your PC while nothing is connected to the SCSI bus, the SCSI BIOS >complains that it has failed self-test and hangs! The only solution >to this appears to be to remove the BIOS ROM. The ST01 card has no >terminating resistors so the SCSI bus floats; this must be bugging >the BIOS. I would guess that they've fixed that problem in the ST01B, which has a 16K rather than 8K EPROM for the BIOS. At any rate, I did something similar with my new ST02. When I was fooling around with putting two hard drives in the system this weekend (an ST157N and an RLL Miniscribe with an XT controller), I had neglected to attach the power cable to the ST157N. The system booted fine, but of course the D: drive was unavail- able for use. BTW, I was very unfortunate to not get the Disk Manager software loaded on the disk. Seagate is sending it to me (real soon now), but I'm a rather impatient individual. Could some kind soul email me an arc'ed/uuencoded version of the software? Until I get it I can only use the first 32 Meg of 48 meg, and I can't set the interleave correctly. For some reason the built-in BIOS formatter always chooses 3:1, and I'm almost positive that my system can handle 1:1. If you can help me out, please email me first so that we don't get multiples in the system. Thanks in advance. David Yon
hydrox@itsgw.rpi.edu (Michael A. Hendrix) (07/21/89)
>What floppy drives does the ST02 support?? 360/1.2/720/1.44??? >How many drives 1/2/4??? > I have a Shamrock 268-12 PC with the ST02 controller. According to what little documentation that I received with it, it will handle all of the formats you stated. I am using a 360K and 3.5" 1.44 without any problems. --------------------------------------------------------------------- "Who said life was fair........I sure as heck didn't" --------------------------------------------------------------------- hydrox@hope.its.rpi.edu Bitnet: F7TZ@RPITSMTS