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Re: Packet Loss

  • From: Steven M. Bellovin
  • Date: Sun Dec 17 00:05:52 2000

In message <[email protected]>, [email protected] writes:
>Content-Type: text/plain; charset=us-ascii
>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