Re: Adding CDROM slows down SCSI subsystem?

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Article #500

#500

From: Dan Ling
Date: Thu, 18 Feb 1993 16:15

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>some of the faster CD-ROM drives available.  However, they have a
>serious flaw if you are puting them on a SCSI bus with other devices.  The
>problem is that they don't disconnect when seeking, doing error recovery,
>etc.  Since CD-ROM drives take a  L O N G  time to seek, this causes
>significant performance degradation.  If you should be unlucky enough to
>encounter a media error that causes a "rezero" in the drive, you will notice
>that the bus is "hung" for about 3 seconds.  This is not acceptable for
>multitasking systems that are trying to access other devices on the same bus.

Does other brands like Texel or Panasonic do connect/disconnect?


Dan

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References: <1993Feb8.225335.15289@cheops.qld.tne.oz.au> <k2.729244115@woodstock> <1993Feb16.141718.5519@illian.mnet.com>

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From: lingy@marcus.its.rpi.edu (Dan Ling)
Subject: Re: Adding CDROM slows down SCSI subsystem?
Message-ID: <cx+4mgb@rpi.edu>
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Organization: Rensselaer Polytechnic Institute, Troy, NY
References: <1993Feb8.225335.15289@cheops.qld.tne.oz.au> <k2.729244115@woodstock> <1993Feb16.141718.5519@illian.mnet.com>
Date: Thu, 18 Feb 1993 16:15:33 GMT
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