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- Newsgroups: comp.unix.aix
- Path: sparky!uunet!ornl!utkcs2!darwin.sura.net!spool.mu.edu!umn.edu!csus.edu!csusac!cdsac!scotte
- From: scotte@cdsac.uucp (L. Scott Emmons)
- Subject: Re: trouble downloading from RS6000 running AIX
- Message-ID: <Dec11.164315.14991@cdsac.uucp>
- NntpPostingHost: cdsac
- Date: 11 Dec 1992 16:43:15 GMT
- Distribution: na
- References: <1992Dec10.055520.11366@vort.cuc.ab.ca>
- Organization: CableData (U.S. Computer Services), Sacramento, CA
- Lines: 33
-
- In article <1992Dec10.055520.11366@vort.cuc.ab.ca> mike@vort.cuc.ab.ca (Mike Nemeth) writes:
- >i'm having trouble downloading files from a RS6000 using x/y/zmodem and
- >a 14.4 v32bis GVC modem. i can download files from a number of different
- >bulletin boards as well as various PCbased UNIX systems without a hitch,
- >however when attempting to download a file from the aforementioned AIX box,
- >i get timeouts and errors and incredibly low character rates (500 characters/
- >second absolute best, pretty awful compared to the 1500 chars/sec or so i
- >can get elsewhere). i believe it _might_ have something to do with
- >CTS/RTS on the AIX box (i have verified that hardware flow control on
- >the receiving end _is_ working), but "stty add rts < /dev/tty" just hangs
- >until i ^C out of it.
-
- You can't change the protocol stack on a tty unless something is connected
- and active. Log into the RS/6000 via the modem, then run:
-
- stty add rts
-
- directly on the tty. That should add RTS/CTS to the protocol stack for you.
-
-
- Also, AIX tunes (by default) the serial ports for interactive input, which
- means the processor only gets an interrupt every 14 characters (if
- memory serves from an IBM class on tuning), or on a timeout. The
- latest version of the tuning guide has a script (allegedly, my copy is
- still on order) that can be used to change this. Dunno if this really
- will help, but the guys from the IBM class suggest it for file
- transfers.
-
-
- L. Scott Emmons
- CableData Research Center
- csusac.csus.edu!cdsac!scotte
- KC6NFP
-