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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!psinntp!isc-newsserver!ritvax.isc.rit.edu!AJB8886
- From: ajb8886@ritvax.isc.rit.edu
- Subject: Re: stiction solved... but wait!
- Message-ID: <1993Jan21.133757.2083@ultb.isc.rit.edu>
- Sender: news@ultb.isc.rit.edu (USENET News System)
- Nntp-Posting-Host: vaxa.isc.rit.edu
- Reply-To: ajb8886@ritvax.isc.rit.edu
- Organization: Rochester Institute of Technology
- References: <2100@bdrc.bdrc.bd.com>,<1993Jan19.220618.27146@mksol.dseg.ti.com>
- Date: Thu, 21 Jan 1993 13:37:57 GMT
- Lines: 71
-
- In article <1993Jan19.220618.27146@mksol.dseg.ti.com>, mccall@mksol.dseg.ti.com (fred j mccall 575-3539) writes:
- >In article <2100@bdrc.bdrc.bd.com> jcl@bdrc.bd.com (John C. Lusth) writes:
- >>Yesterday, I asked the net about a Seagate 1102A drive that seemed to
- >>be dead. The consensus wast that the drive was suffering from the
- >>infamous "stiction" problem. I had thought that this was a problem for
- >>the older Seagates, but apparently not so. After an "attitude adjustment",
- >>my drive began to spin up and make the familiar noises it used to make.
- >>
- >>But... out of the frying pan and into the fire.
- >>
- >>Now, when attached to my primary PC, the drive spins up when I power
- >>on, but immediately I get POST error beeps. Five to be exact. In my
- >>motherboard manual, this means a CPU error (AMI bios). When attached
- >>to my other PC, the computer does not even attempt the POST. Both
- >>computers work fine without the Seagate attached. If I attach the
- >>drive with the computers already booted up, as soon as I attach the
- >>power connector, bad things happen.
- >>
- >>This is getting more ominous. What I can't figure out is why the drive
- >>would spin up and sound perfectly happy while somehow disrupting the
- >>voltages in the rest of the computer.
- >>
- >>I would appreciate any (more) help on this.
- >
- >Even though it sounds like it is spinning up, it may not be coming all
- >the way up to speed. Then when the computer does POST, it thinks the
- >thing isn't spinning up and hits it with current to start it. I'm
- >currently having this problem with a CDC ESDI drive with around 40,000
- >near-continuous hours on it, although my symptoms are somewhat
- >different. On my machine, I power it on, I can heard the drive and
- >fans spin up, then when the machine goes to boot it is unable to read
- >the hard drive, and you can HEAR the whole machine go 'ungh' when it
- >hits the drive with a power surge to spin it up. Fans slow down and
- >everything. It tries that a couple of times, then comes back with a
- >"Hard Drive Failure" message, starts the light on the front of the
- >drive flashing briskly, and has to be booted from some other media.
-
-
- That's a spinup/recalibration failure. The hard drive shuts down at this point
- (when you see the drive light flashing in a regular pattern and no disk
- activity, it's almost invariably a "fatal error during spinup").
-
- I had that problem myself with a VERY old (8-9 + years) CDC 40MB (formatted RLL
- to 60). Turns out the problem was a weak/damaged spindle motor controller
- board. Replacing this controller section (the flat card mounted on the rear of
- the drive) solved the problem, and it's been running strong without a single
- flaw ever since (that was 3 years ago). I'd originally replaced only the
- submini electromechanical relay on the back of that board, but it was only a
- temporary solution. Replacing the spindle controller board was a permanent
- solution.
-
- Alex
-
- was 3 years ago).
-
- >
- >I suspect that the bearings have gotten dry (although 40k hours
- >doesn't sound like that many) and that it ran ok as long as it was
- >warm, but when I shut it down for a week over Thanksgiving it cooled
- >off and now isn't spinning quickly enough to be readable. Perhaps if
- >the bearings were warm it would work ok (or perhaps not). I expect
- >I'm going to have to send it in to get the bearings replaced or
- >something.
- >
- >[Unless, of course, someone else has a better idea.]
- >
- >--
- >"Insisting on perfect safety is for people who don't have the balls to live
- > in the real world." -- Mary Shafer, NASA Ames Dryden
- >------------------------------------------------------------------------------
- >Fred.McCall@dseg.ti.com - I don't speak for others and they don't speak for me.
-