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Date: Tue, 9 Sep 1997 08:26:56 +0930
From: Greg Lehey <grog@lemis.com>
To: Simon Shapiro <Shimon@i-Connect.Net>
Cc: hcremean@vt.edu, chat@FreeBSD.ORG, Mike Smith <mike@smith.net.au>
Subject: Re: lousy disk perf. under cpu load (was IDE vs SCSI)
References: <19970908164852.40911@lemis.com> <XFMail.970908143707.Shimon@i-Connect.Net>
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In-Reply-To: <XFMail.970908143707.Shimon@i-Connect.Net>; from Simon Shapiro on Mon, Sep 08, 1997 at 02:37:07PM -0700
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On Mon, Sep 08, 1997 at 02:37:07PM -0700, Simon Shapiro wrote:
>
> Hi Greg Lehey;  On 08-Sep-97 you wrote:
>>  On Mon, Sep 08, 1997 at 03:46:35PM +1000, Mike Smith wrote:
>>>>
>>>> PS: When did the first voice-coil-seek hard drives come out? This is a
>>>> question that's been bugging me for some time now...
>>>
>>> Linear or rotary actuator?
>>
>>  I'd always equated "voice coil" with linear actuators.  I'd guess the
>>  early 70s.  We installed the first UNIVAC 8440s in 1973.  I think they
>>  were voice coil.  They looked like 3330 copies.
>>
>>> The linear VC actuator probably predates the use of stepper motors;
>>
>>  I'd think so.  The stepper motors wouldn't have got into hard drives
>>  until about the ST-506.
>
> The 26MB Shugart 14" drive had stepper and AC spinfle motor on a long belt.

When was that introduced?

Greg