Path: utzoo!utgpu!cunews!bnrgate!brtph3!brchh104!brchs1!bnr.ca!rice!sun-spots-request
From: James.Reilly@tel.vtt.fi (Jim Reilly)
Newsgroups: comp.sys.sun
Subject: 150 Mb tape drive question
Keywords: Hardware
Message-ID: <233@brchh104.bnr.ca>
Date: 16 Nov 90 12:05:00 GMT
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Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Original-Date: 29 Oct 90 16:05:08 GMT
X-Sun-Spots-Digest: Volume 9, Issue 361, message 2
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I have a question about our Sparc stations (150 Mb) tape drive, well
actually about the tapes.  The tapes (Sony QD-6150) are 620 ft, 12500
ftpi.

What does ftpi stand for ?  I've assumed it means bpi, and that the
calculation for how much can be stored on it is:

(600 ft)(12500 bits/in)(12 in/ft)(18 tracks)(1 byte/8 bits) =
          202500000 bytes

which should roughly hold 150 Mbytes of real data.  Am I correct, or
hopelessly wrong ?

(please respond to reilly@tel.vtt.fi, as I don't read Usenet too often)

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