RE: 25GB tape

["Chuck Lewis" <clewis@xxxxxxxxxx>]

Rob,

Did you get my "off list" note ?

Chuck

-----Original Message-----
From: midrange-l-admin@midrange.com
[mailto:midrange-l-admin@midrange.com] On Behalf Of rob@dekko.com
Sent: Friday, December 20, 2002 2:41 PM
To: midrange-l@midrange.com
Subject: Re: 25GB tape

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I'll check on that tape.  (Update, a 25gb will not write to anything
smaller than a 13gb.  Therefore a 4gb would have hurled.)

However, I wonder about those compression figures.  Are the bytes
written
before, or after, compression?

For example, we use TSM on another machine.  TSM already stores the data
compressed on disk.  Therefore when it goes to tape the tape compression
buys you nothing.

Rob Berendt
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin




"Eric Graeb" <eric_graeb@kingoptical.com>
Sent by: midrange-l-admin@midrange.com
12/20/2002 08:19 AM
Please respond to midrange-l

        To:     <midrange-l@midrange.com>
        cc:
        Fax to:
        Subject:        Re: 25GB tape


This is really odd.  We run a 4G Qic drive but with 400 compression it
holds
8.  By this calculation you should be able to get around 50G on yours.
Are
you sure that the tape the operator put in is not a 4G tape.  Looks like
were getting about the same performance :).

Eric Graeb
AS/400 Administrator
King Optical Group Inc.


> This is a multipart message in MIME format.
>
> That is one days statistics.  Therefore it said that it could hold
> 9,097,207k or 9gb.  That doesn't seem right.  I am suspecting the
write
> errors threw it all off.

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