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From: cmcmanis@sun.uucp (Chuck McManis)
Newsgroups: comp.sys.amiga
Subject: Re: FORMAT Question also COPY question     n
Message-ID: <10220@sun.uucp>
Date: Mon, 8-Dec-86 13:54:25 EST
Article-I.D.: sun.10220
Posted: Mon Dec  8 13:54:25 1986
Date-Received: Mon, 8-Dec-86 21:32:25 EST
References: <4973@pur-ee.UUCP>, <9769@sun.uucp> <258@esunix.UUCP>
Organization: Sun Microsystems, Inc.
Lines: 19
Summary: Sorry no verify

In article <258@esunix.UUCP>, blgardne@esunix.UUCP (Blaine Gardner) writes:
*> Ok, so format does not lock out bad sectors, does DISKCOPY
*> (CLI or Workbench flavors) do ANY kind of verification on
*> the data that has been written?
*> 
*> Blaine Gardner @ Evans & Sutherland

Yes it does but effectively No it doesn't. Disassembly of the COPY and
DISKCOPY commands show that they check the return value from the call
to the trackdisk.device, however the trackdisk.device does not check
for anything but the most fatal errors on write (like disk not connected)
It should have a flag for read-after-write verification but it doesn't seem
to. So you are pretty much relying on reliable data transfer. 


-- 
--Chuck McManis
uucp: {anywhere}!sun!cmcmanis   BIX: cmcmanis  ARPAnet: cmcmanis@sun.com
These opinions are my own and no one elses, but you knew that didn't you.