Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/17/84; site abic.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!gamma!epsilon!zeta!sabre!petrus!bellcore!decvax!cwruecmp!abic!aep
From: aep@abic.UUCP (Alex Pensky)
Newsgroups: net.micro.cpm
Subject: Re: disk errors [!PLEH] (BDOS err on a:)
Message-ID: <711@abic.UUCP>
Date: Mon, 23-Dec-85 12:31:35 EST
Article-I.D.: abic.711
Posted: Mon Dec 23 12:31:35 1985
Date-Received: Wed, 25-Dec-85 01:36:33 EST
References: <633@sfmin.UUCP>
Distribution: net
Organization: Allen-Bradley Co., Highland Heights, OH 44143
Lines: 14

> [BDOS err on a: bad sector]
> I see that message way too often. ...

Could be that CP/M is still using the directory and disk parameters from
a disk previously in the same drive, for which the current disk access
would have been erroneous.  The solution is to warm boot (control C)
after every disk change.  If you are running purchased software which
requires disk changes but doesn't reread the directory after you do so,
the software is buggy.

Sorry if this seems like trivial help, but you didn't say what causes
you had already ruled out before suspecting your diskettes.
 
 - Alex Pensky