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- Xref: sparky comp.sys.atari.st:19151 comp.sys.atari.st.tech:6448
- Path: sparky!uunet!portal!cup.portal.com!Bob_BobR_Retelle
- From: Bob_BobR_Retelle@cup.portal.com
- Newsgroups: comp.sys.atari.st,comp.sys.atari.st.tech
- Subject: Re: Hard Drive (wierd) Problem - Help!
- Message-ID: <72815@cup.portal.com>
- Date: Sun, 3 Jan 93 13:40:47 PST
- Organization: The Portal System (TM)
- References: <H.eg.8xoBXXa8KAU@elfhaven.ersys.edmonton.ab.ca>
- <1992Dec31.114129.236@janus.arc.ab.ca>
- <1993Jan03.160353.269@donau.et.tudelft.nl>
- Lines: 35
-
- Michael Forget wrote about his Megafile making noises..
-
- There are two sources of such noises normally.. the first is a
- "head crash" where the flying read/write heads make contact
- with the spinning disk and gouge the surface of the disk.
- The material scraped from the surface will cause secondary
- crashes until the heads and surfaces are destroyed. The noise
- from a head crash will usually be a scraping and grinding sound.
-
- You do NOT want this to happen..! :)
-
- The second source of noise is a "ground strap" which serves to bleed
- off static electricity which would otherwise build up on the spinning
- platters. The place where this strap contacts the end of the axle
- tends to wear, allowing the strap to vibrate and make noises.
-
- This is not destructive, only annoying.
-
- There are ways to dampen the vibrations of the ground strap, but they
- require disassembly of the case, and possibly removing the pc board
- on the bottom of the hard drive itself. If you can get to it, a small
- blob of silicone sealer on the *outside* of the strap will often cure
- the noises.
-
- (A third source of noise could be failing bearings in the cooling fan,
- but it would be pretty obvious where that noise was coming from.)
-
- In the case of a head crash, you'd know it very soon, as the drive would
- become unreadable, and there would be many errors.
-
- From the description of the symptoms, and especially because the noise
- changes with the orientation of the drive, it sounds like the ground
- strap to me...
-
- BobR
-