Date: Mon, 08 Sep 1997 14:37:07 -0700 (PDT) From: Simon Shapiro <Shimon@i-Connect.Net> To: Greg Lehey <grog@lemis.com> 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) Message-ID: <XFMail.970908143707.Shimon@i-Connect.Net> In-Reply-To: <19970908164852.40911@lemis.com>
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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. > > Greg --- Sincerely Yours, (Sent on 08-Sep-97, 14:19:04 by XF-Mail) Simon Shapiro Atlas Telecom Senior Architect 14355 SW Allen Blvd., Suite 130 Beaverton OR 97005 Shimon@i-Connect.Net Voice: 503.643.5559, Emergency: 503.799.2313
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