Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!POURNE@mit-mc
From: POURNE%mit-mc@sri-unix.UUCP
Newsgroups: net.micro.cpm
Subject: *** SOMEWHAT IMPORTANT on dBase2 **
Message-ID: <15382@sri-arpa.UUCP>
Date: Wed, 11-Jan-84 06:07:00 EST
Article-I.D.: sri-arpa.15382
Posted: Wed Jan 11 06:07:00 1984
Date-Received: Sun, 15-Jan-84 20:30:49 EST
Lines: 19

From:  Jerry E. Pournelle <POURNE@mit-mc>

Your RESETT fix for Dbase 2 uses CP/M function 37 Reset Disk.

DO NOT USE THAT FUNCTION.

Function 37 has a serous bug, undocumented, that can cause CP/M
to write over the directories OF ALL DISKS it can get at,
including the A: disk, hard disks, memory drive disks, etc.  We
do not know precisely what triggers the bug; it takes a
reasonably complex pattern of disk changes and resets; but it
DOES THE JOB.  I know of three casees in which 10 megaByte hard
disks had to have their files reconstructed sector by sector
because they were bitten by CP/M FUNCTION 37.
	You must use RESET SYSTEM even though that logs you on
to the A: drive (and takes longer).  I repeat, DO NOT USE
FUNCTION 37.  You will regret it if you do.

J E Pournelle