Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uunet!motcid!hamilton
From: hamilton@cell.mot.COM (Danial Hamilton)
Newsgroups: comp.sys.ibm.pc
Subject: Problem: modem errors w/ disk cacheing?
Keywords: modem, disk cacheing, RLL, comm errors
Message-ID: <1421@oak8.UUCP>
Date: 1 Mar 90 15:59:40 GMT
Distribution: comp.sys.ibm.pc, comp.dcom.modems
Organization: Motorola Inc. - Cellular Infrastructure Div., Arlington Heights, IL 60004
Lines: 19


My environment:

I'm running a 25 Mhz 386 with a Seagate ST277R-1 65MB 28ms RLL drive.
I'm using a WA6-VR 1:1 controller with disk cacheing.  My modem is a
USR Courier HST dual standard.

My problem:

When transferring files at high rates (9600, 14400), I encounter
frequent errors (like every other block) using ymodem or xmodem.

A friend told me that the disk cacheing is to blame because interrupts
are disabled while the cacheing is being executed and at high bit rates
I'm probably missing characters.

Can anyone confirm that this is true?  If it is true, is there any way
to temporarily disable the disk cacheing short of wiring an external 
switch to the jumper on the controller board?