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Date:      Sat, 19 Dec 1998 16:24:59 -0600
From:      Jon Hamilton <hamilton@pobox.com>
To:        Gary Kline <kline@tera.com>
Cc:        questions@FreeBSD.ORG
Subject:   Re: 4mm tape drive question 
Message-ID:  <199812192223.OAA25905@hub.freebsd.org>
In-Reply-To: Your message of "Sat, 19 Dec 1998 12:12:05 PST." <199812192012.MAA23074@athena.tera.com> 

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In message <199812192012.MAA23074@athena.tera.com>, Gary Kline wrote:
} According to Jon Hamilton:
} > 
} > } > Gary Kline writes:

[ ... ]

} 		Way back in the Middle Ages of 1995, they 
} 		prob'ly had no idea of hardware compression;
} 		and at any rate, this drive doesn't have it.

Oh no, tape drives were doing hardware compression well before 1995.
It sounds like you've got a pretty low end (for the time) unit, though,
and it may very well not have such a feature.

} > } 	I need to buy a second tape drive (4mm or 8mm) for sage and
} > } 	tar | dd across my net.  ...The good news, of course, is that
} > } 	I'm never (?!) going to have 11G of data to backup.
} > 
} > You'd have to be a slow learner to believe that :)  You said yourself
} > that just 4 years ago, 2G was "a _lot_" of storage, and you've since
} > bought a 9G drive.  I'm confident that your storage needs will continue
} > to increase, possibly even at an increased rate.  With the continued
} > improvement of processing power, data sets are getting larger, and so
} > are applications.  That trend is unlikely to reverse (or even to slow
} > appreciably).
} 
} 	Unfortunately! 
} 
} 	In '91 I coughed up a bazillion dollars for a  1.08G 
} 	drive for my SVR4 system.   Was certain that it would
} 	be (at least) decades before I'd ever be crunched, but
} 	within a few years I was running with filesystem slices
} 	at 90-95%.

The good news is that the cost to upgrade has continued to fall too.
You can get a complete system (with monitor, printer, and even a frill
or two) for under US$1000 these days; I remember having paid twice that
for a 105Mb disk drive some years back :)  If performance keeps doubling
every few years while total cost for a "cutting edge minus a little" system
continues to fall, I won't be too upset.

-- 
   Jon Hamilton  
   hamilton@pobox.com


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