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From: hbo@sbphy.ucsb.edu..ucsb.edu (Howard B Owen)
Newsgroups: comp.sys.dec
Subject: Re: various tape capacities
Keywords: TK70, TK50
Message-ID: <6215@hub.ucsb.edu>
Date: 2 Sep 90 03:59:04 GMT
References: <1806@gazette.bcm.tmc.edu> <6491@tekgen.BV.TEK.COM>
Sender: news@hub.ucsb.edu
Reply-To: hbo@sbphy.ucsb.edu (Howard B Owen)
Organization: UCSB Physics Department
Lines: 32
Summary:TK50 media == TK70?
Distribution:na

In article <6491@tekgen.BV.TEK.COM> mike@raven.uss.tek.com (Mike Ewan) writes:
>In article <1806@gazette.bcm.tmc.edu> tim@watson.bcm.tmc.edu (Timothy Owen Lesniak) writes:
>> [...]
>
>>TK70
>I believe this is 128Mb.
>
     The tape labels distributed by DEC say 298Mb.

>>TK50
>This is somewhere between 60 and 90Mb depending on how fast you 
>stream the data to the device.
>
   I vaguely recall someone claiming that TK50 cartridges could be used
at TK70 densities if only a certain magic sequence were followed. Given
the difference in cost between TK70 carts from DEC and TK50s from 3M,
using the latter could result in substantial savings. Does anyone know
if this is possible? If so, are there any problems related to media quality
that might make the cartridge II tapes a good idea despite the extra
cost? 

--
Howard Owen, Computer Systems Manager           internet: hbo@sbphy.ucsb.edu
Physics Computer Services                       BITNET: HBO@VOODOO.BITNET
University of California, Santa Barbara         HEPNET/SPAN:   VOODOO::HBO
"I am not a pay TV service!"                    805-893-8366 (work)

--
Howard Owen, Computer Systems Manager           internet: hbo@sbphy.ucsb.edu
Physics Computer Services                       BITNET: HBO@VOODOO.BITNET
University of California, Santa Barbara         HEPNET/SPAN:   VOODOO::HBO
"I am not a pay TV service!"                    805-893-8366 (work)