postman#@andrew.cmu.edu.UUCP (01/31/87)
ReSent-To:nntp-xmit#@andrew.cmu.edu Return-path: <kg0r#@andrew.cmu.edu> To: outnews#ext.nn.comp.sys.ibm.pc@andrew.cmu.edu I just bought a used 20M hard disk from a friend, who had been using it as a 30M with an RLL controller. He also threw in a Western Digital controller, so I now have to reformat the disk for 20M. Unfortunately, he didn't give me any documentation (he couldn't find it.) The board has a whole bunch of pins on it for configuration, but there are no jumpers/shorting blocks. I cannibalized some jumpers from my multifunction card, but trial and error plugging and unplugging of jumpers hasn't placed anything meaningful at C800:0000. Can someone help me? I need to know what each group of pins is for, and/or what each combination of jumpers means. Kenneth Gober kg0r@andrew.cmu.edu P.S. I have found 1 jumper that exhibits interesting behavior. When I short the pins together, C800:0000 is flooded with 0xFF. When I take the jumper off, C800:0000 goes back to sequences of seemingly random 0xE8's and 0xE2's. Anyone have any idea what that jumper's for? The short slot? Is the EPROM on the card blank?
psfales@ihlpl.UUCP (02/03/87)
> I just bought a used 20M hard disk from a friend, who had been using it as a > 30M with an RLL controller. He also threw in a Western Digital controller, > so I now have to reformat the disk for 20M. Unfortunately, he didn't give me > any documentation (he couldn't find it.) The board has a whole bunch of pins > on it for configuration, but there are no jumpers/shorting blocks. I > cannibalized some jumpers from my multifunction card, but trial and error > plugging and unplugging of jumpers hasn't placed anything meaningful at > C800:0000. Can someone help me? I need to know what each group of pins is > for, and/or what each combination of jumpers means. I tried to send email to this person, but the mailer choked so I will try here. My WD controller came with a "manual" consisting of a large double sided sheet of paper. There wasn't an awful lot of information, but it did explain what each jumper is for and how to do a low level format. If anyone is really desperate, I could probably provide a copy but I would suggest trying to sweet talk your local computer store - I would think that any store that sells systems with WD controllers would have extra copies around. For an interesting test, put in the jumper that causes the non-FF values to appear at C800:0000, enter DEBUG, and type g=c800:5 Hope that helps -- Peter Fales UUCP: ...ihnp4!ihlpl!psfales work: (312) 979-7784 AT&T Information Systems, IW 1Z-243 1100 E. Warrenville Rd., IL 60566
porter@topaz.rutgers.edu (Adam L. Porter) (08/03/88)
Can anyone give me some help with my controller? I get an "ECC TEST FAILED" on a certain diagnostic program on my Western Digital controller, which is hooked up to a Seagate ST-225. Is this a serious problem? (It doesn't seem to effect anything.) Is it easily repaired/diagnosed? Any help would be greatly appreciated. Come on, you hardware gurus out there!
bear@bgsuvax.UUCP (Michael D. Bear) (08/03/88)
In article <Aug.2.18.19.44.1988.16050@topaz.rutgers.edu>, porter@topaz.rutgers.edu (Adam L. Porter) writes: > Can anyone give me some help with my controller? > I get an "ECC TEST FAILED" on a certain diagnostic program on my Western I have seen a couple of PD hard disk test programs that include an ECC test, and they always seem to fail on XT class machines. I think most XT controllers don't implement ECC, so the test is meaningless. At any rate, mine failed too, and has worked fine for years... -- Michael D. Bear UUCP .!cbosgd!osu-cis!bgsuvax!bear Computer Technician CSNET bear@bgsu.edu Bowling Green State University ARPANET bear%bgsu.edu@relay.cs.net (419) 372-2104