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From: kak@stc-auts.UUCP (Kris Kugel)
Newsgroups: comp.sys.att
Subject: Re: PC6300 hard disk and controller questions?
Message-ID: <226@stc-auts.UUCP>
Date: Wed, 7-Oct-87 12:03:43 EDT
Article-I.D.: stc-auts.226
Posted: Wed Oct  7 12:03:43 1987
Date-Received: Sat, 10-Oct-87 11:13:51 EDT
References: <21066@ucbvax.BERKELEY.EDU> <744@mtunf.ATT.COM>
Organization: Storage Technology Corp, Louisville, CO
Lines: 26
Keywords: hard_disk hard_disk_controller
Summary: WD controler card placement critical


On my 6300+, I was adding some cards, and found the controler
card sitting in the middle of the slots.

"How silly!" I thought, "It should be next to the disk,
so that the cables aren't laying over everything!  I will
move it there."

Well, not long afterwards, my machine started having problems
booting up.  First it would boot after two or three trys,
then after three or four trys, then ...

I called in the AT&T Hotline calvary, and they sent out a technician.
He opened the machine, looked at my cards, and said "There's your problem."

I looked and said, "Where?"

It turns out that the WD controller is sensitive to the magnetic fields
generated by the hard disk, and you should place it at least 4 slots
away from the disk.

Moral: computer hardware is weird, even when designed not to be.

	Kris A. Kugel
	Storage Tek:    ...{hao,nbires,ihnp4}!stcvax!stc-auts!kak
	High Country Software: ...{hao,nbires,wldrdg}!hicntry!kak