*BSD News Article 23993


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Newsgroups: comp.os.386bsd.questions
Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!haven.umd.edu!darwin.sura.net!nih-csl!helix.nih.gov!crtb
From: crtb@helix.nih.gov (Chuck Bacon)
Subject: Re: Buslogic 742
Message-ID: <1993Nov15.191332.3874@alw.nih.gov>
Sender: postman@alw.nih.gov (AMDS Postmaster)
Organization: National Institutes of Health, Bethesda
References: <IgrahoK00iUx473292@andrew.cmu.edu> <1993Nov14.163302.26421@csus.edu>
Date: Mon, 15 Nov 1993 19:13:32 GMT
Lines: 48

In article <1993Nov14.163302.26421@csus.edu> rmallory@silicon.csci.csusb.edu (Rob Mallory) writes:

>Rob Mallory        [rmallory@silicon.csci.csusb.edu]
>ps: I got a kick out of the "using Kermit to get the base-system"[sic]  
>  line in the latest install_doc of freebsd! what would that work out 
>  to, around 4.5 hours without any errors at 1222cps? Actually, thats
>  probably a good tradeoff for 13 disks.. Same goes for the X86 dist!
>            ....something to sleep on

I used Kermit a week ago to load 81 files of 240640 bytes each (about
19.4MB), and it took 3hrs 4min.  These were chunks of a .tgz file,
compressed.  If your Kermit isn't up to date with long packets, sliding
windows and settable control code prefixing, upgrade now!

The computers: A Sun IPC sending via telnetted Cisco term. server
connected at 38.4 kbps; a 486DX33, 8MB, FreeBSD-release, sio tty driver
at 19.2 kbps, IDE disks.

Kermit 5A(189) at both ends, as follows:
  3000 byte packets
  3 windows
  carefully tuned control code prefixes
  no eighth bit prefixing
  block check 3
  RTS/CTS flow control
  1742 file cps
  efficiency 91%

Modem and phone line: Connected to the FreebSD system at 19.2 kbps,
an AT&T 3820 modem, running V.32terbo (19.2 kbps) + V.42bis.
A *LOCAL* call to the Sun (through a terminal server).
I didn't run at 38.4 kbps because experience showed me I lose.

Since then I downloaded another bunch of split .tgz files for XFree86,
about 12.4 MB.  Kermit reported 1hr 57min, 1769 cps, 92% efficiency.

Since that time, I've catted and ungtarred all of it, with no errors.
I did both batches overnight.

At those rates, I'd quite willingly download 48 MB of compressed .tgz
file chunks overnight.  At about 6 MB per hour, a good night's sleep.

	Chuck Bacon - crtb@helix.nih.gov

PS: C&P Phone Co. doesn't charge by the minute, just by the call 8^)
--
	Chuck Bacon - crtb@helix.nih.gov ( alas, not my 3b1 )-:
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