From PICLIST@MITVMA.MIT.EDU Thu Nov 14 02:37:28 2002 Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP (SMTPD32-7.13) id ACE8F2500B4; Thu, 14 Nov 2002 02:37:28 -0800 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <18.007D3937@cherry.ease.lsoft.com>; Thu, 14 Nov 2002 5:23:39 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8d) with spool id 0798 for PICLIST@MITVMA.MIT.EDU; Thu, 14 Nov 2002 04:33:09 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 3199; Thu, 14 Nov 2002 04:32:48 -0500 Received: from nameserv.rl.ac.uk [130.246.135.129] by mitvma.mit.edu (IBM VM SMTP Level 320) via TCP with ESMTP ; Thu, 14 Nov 2002 04:32:47 EST X-Comment: mitvma.mit.edu: Mail was sent by nameserv.rl.ac.uk Received: from sstdwkiwi (sstdwkiwi.ag.rl.ac.uk [130.246.189.231]) by nameserv.rl.ac.uk (8.8.8/8.8.8) with SMTP id JAA28968 for ; Thu, 14 Nov 2002 09:32:47 GMT References: X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 Message-ID: <008401c28bc0$cb551e10$e7bdf682@sstdwkiwi> Date: Thu, 14 Nov 2002 09:32:47 -0000 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: "Alan B. Pearce" Subject: Re: [EE]: Do floppy drives have any error checking/correction? To: PICLIST@MITVMA.MIT.EDU X-RCPT-TO: Status: R X-UIDL: 277600423 X-Evolution-Source: pop://mailinglist%40farcite.net@mail.farcite.net/ Mime-Version: 1.0 X-Evolution: 00000690-0000 >I know there is a verify /v option for copy in >dos. IE "copy /v c:test.dat a:". Which is fine when writing. But I believe the answer to the query is that each sector on the floppy disk has a 16 bit CRC field for doing error detection when reading the sector. This allows read errors to be detected. It is vaguely possible to have an error such that the CRC field does not detect the error, but on a sector size used on a floppy this is highly unlikely. -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics