[32863] in North American Network Operators' Group
Re: Packet Loss
daemon@ATHENA.MIT.EDU (Hugh Irvine)
Fri Dec 15 11:41:29 2000
From: Hugh Irvine <hugh@open.com.au>
Reply-To: hugh@open.com.au
To: Valdis.Kletnieks@vt.edu,
"John R. Grant" <jgrant@liveonthenet.com>
Date: Sat, 16 Dec 2000 03:45:17 +1100
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Cc: nanog@merit.edu
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Hello all -
On Sat, 16 Dec 2000, Valdis.Kletnieks@vt.edu wrote:
>
> 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.
Slightly off topic, but interesting nonetheless.
I once worked on a marine seismic data acquisition system in the North Sea oil
fields, and we ran the system 24/7 when we were on a job. We generated 9-track
6250 GCR tapes at the rate of about one tape every 10 minutes. We used to buy
and ship the tapes by the container load (and we used a Cray to process the
data...).
cheers
Hugh
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