Re: DAT as data drive

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Article #43

#43

From: Dale Lancaster
Date: Mon, 27 Jul 1992 16:57

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In <1992Jul27.105750.1830@donau.et.tudelft.nl> wolff@duteca8.et.tudelft.nl (Rogier Wolff) writes:

>dale@convex.com (Dale Lancaster) writes:

>>In <92201.120931ADB103@psuvm.psu.edu> <ADB103@psuvm.psu.edu> writes:
>>It is likely that you can work up a computer connection to these
>>drives (ID1, ID2, ID3), but my survey of the ID type drives is
>>that the Bit Error Rate is too high to store digital data (typically
>>in the 1x10-10 range.  A coulpe of vendors have adapted the ID
>>drive to a DD (Digital Data)  drive, but it took some work to get
>>the BER down to 1x10-13 which also added to the cost of the drive.

>A software (dual) parity check or reed-solomon ecc, would in no time
>improve the BER to better than 1x10-13. One would have to do good blocking
>and so forth to prevent dataloss due to a burst of errors.

10-13 is the best I have seen on any DD drive, but it appears that this
is not a bad error rate.  That most people seem to think it is acceptable.
You could create parity blocks and of course the BER jumps to what? maybe
10-20 or so?

dml
--
===========================================================================
Dale M. Lancaster, Mass Storage Marketing Manager, Convex Computer Corp.
(Work) 214-497-4581     (Fax) 214-497-4848     (Internet) dale@convex.com
===========================================================================

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References: <92201.120931ADB103@psuvm.psu.edu> <dale.711685272@convex.convex.com> <1992Jul27.105750.1830@donau.et.tudelft.nl>

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Path: arc1-ca.pugleaf.net!sparky!uunet!darwin.sura.net!convex!dale
From: dale@convex.com (Dale Lancaster)
Subject: Re: DAT as data drive
Message-ID: <dale.712256226@convex.convex.com>
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Organization: CONVEX Computer Corporation, Richardson, Tx., USA
References: <92201.120931ADB103@psuvm.psu.edu> <dale.711685272@convex.convex.com> <1992Jul27.105750.1830@donau.et.tudelft.nl>
Date: Mon, 27 Jul 1992 16:57:06 GMT
X-Disclaimer: This message was written by a user at CONVEX Computer
              Corp. The opinions expressed are those of the user and
              not necessarily those of CONVEX.
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