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- From: jochen@mrz.sub.org (Jochen Fahrner)
- Newsgroups: comp.unix.sysv386
- Subject: Re: SCO: loosing characters on serial port
- Message-ID: <JOCHEN.92Aug18115519@mrz.sub.org>
- Date: 18 Aug 92 09:55:19 GMT
- References: <JOCHEN.92Aug16104646@busybit.mrz.sub.org>
- <Bt4IBM.GJy@gator.rn.com>
- Sender: uucp@stasys.sta.sub.org
- Organization: Muenchener Rechenzentrum, Munich/Bavaria
- Lines: 37
- X-Md4-Signature: 99fc778b57a51b985686515075d8cd2e
- In-Reply-To: larry@gator.rn.com's message of 17 Aug 92 10:26:09 GMT
-
- In article <Bt4IBM.GJy@gator.rn.com> larry@gator.rn.com (Larry Snyder) writes:
-
- Yes -- we have a 486/50 running SCO 3.2.2 and have a dumb serial port
- locked at 19200 (it's not a 16550AFN) and we get a steady 1260-1320 cps
- on outbound traffic, and 800 cps on inbound.
-
- I think you have the same problem. Why do you only get 800 cps on
- inbound traffic ? This should be the same as outbound.
- The cause is probably, that you loose incoming characters, which cause
- the uucp protocol to stop, waiting for a timeout.
-
- You should try the following:
- Login to your News-Site with a normal shell account and do something
- like "ls -lR", which you can check easy for loosing characters. At the
- same time do something like "while : ; cp /unix /tmp/unix; done" in
- the background.
-
- You can also watch the Rx-Led on your modem when uucico receives large
- files. The Rx-Led should never stop flickering. If it does for more
- than one second, you probably loose incoming characters.
-
- I just spoke with our dealer: the german distributor, from which he
- receives the adaptec controllers, knows about problems with adaptec
- 1542 in multitasking systems like OS/2 or unix. Even in DOS
- environments problems are reported. But adaptec always says, it's not
- their controller, these are timing problems with the mainboard. This
- distributor recommends: don't use the 1542 in multitasking systems,
- use the 1522 (which is not so good in performance with large disks),
- use the 1742 (in EISA systems) or use an adapter from other
- manufacturers like Future Domain or DPT.
-
- P.S.: To all mainboard manufacturers in this world: Make it
- Adaptec-1542-compatible :-) :-) :-)
- --
- Jochen Fahrner, jochen@mrz.sub.org, Home: jochen@busybit.mrz.sub.org
-