[32894] in North American Network Operators' Group
Re: Packet Loss
daemon@ATHENA.MIT.EDU (Steven M. Bellovin)
Sun Dec 17 00:04:30 2000
From: "Steven M. Bellovin" <smb@research.att.com>
To: Valdis.Kletnieks@vt.edu
Cc: "John R. Grant" <jgrant@liveonthenet.com>, nanog@merit.edu
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Date: Sat, 16 Dec 2000 06:07:17 -0800
Message-Id: <20001216140717.1E18935DC6@smb.research.att.com>
Errors-To: owner-nanog-outgoing@merit.edu
In message <200012151551.eBFFpKCW23482@black-ice.cc.vt.edu>, Valdis.Kletnieks@v
t.edu writes:
>
>--==_Exmh_-322173952P
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>On Fri, 15 Dec 2000 09:24:04 CST, "John R. Grant" said:
>> <cringe>
>> that would be 9600 bit per inch GCR format 9-track tape, don't you think?
>> </cringe>
>
>At least in the IBM world, the options for 7-track were 200/556/800 bpi
>with even or odd parity, and mode=normal/data converter/translator. For
>9-track the options are 800 NRZI, 1600 PE, and 6250 GCR.
>
>I still have 21 9-track tapes in my office that I need to do something with,
>as our last system with 3420-style round tapes is being decomissioned in
>the next few months.
Let's see... 6250 bpi * 12 in/ft * 1600 ft == 120M, if I haven't
miscounted decimal places. So you can fit 5 tapes per CD-ROM, and save
a lot of space.
--Steve Bellovin
