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From: ghg@ecn.purdue.edu (George Goble)
Newsgroups: comp.unix.large
Subject: Re: tape/backup systems
Message-ID: <1990Sep12.175324.23808@ecn.purdue.edu>
Date: 12 Sep 90 17:53:24 GMT
References: <12701@encore.Encore.COM>
Organization: Purdue University Engineering Computer Network
Lines: 14

In article <12701@encore.Encore.COM> terryk@encore.com (Terence Kelleher) writes:
>How do large systems typically deal with the problem of backups?  I am
>trying to find answers for a 50-100 Gbyte disk system.  
>
>Although 8mm and 4mm have the capacity to handle the amount of data
>efficiently, the transfer rates are quite slow, given the volume of
>data to move.  Also, the reliability of the heilical scan devices is
>well established.
>

The Exabyte EXB-8500 8mm drive, due out in the near future, will do
30MB/min xfer, and 5GB on a P5-90 8mm tape. This compares to approx 2.5GB
and 15 MB/min for the current EXB-8200.
--ghg