Date: Tue, 7 Dec 2004 22:26:43 GMT From: Richard Bejtlich <taosecurity@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/74827: Problem with dd(1) and/or /dev/fd Message-ID: <200412072226.iB7MQhUQ093783@www.freebsd.org> Resent-Message-ID: <200412072230.iB7MUXea014955@freefall.freebsd.org>
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>Number: 74827 >Category: misc >Synopsis: Problem with dd(1) and/or /dev/fd >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Dec 07 22:30:32 GMT 2004 >Closed-Date: >Last-Modified: >Originator: Richard Bejtlich >Release: 5.3 RELEASE >Organization: TaoSecurity >Environment: FreeBSD orr.taosecurity.com 5.3-SECURITY FreeBSD 5.3-SECURITY #0: Wed Dec 1 15:22:42 UTC 2004 root@builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386 >Description: I am unable to use dd(1) to create floppies from image files under FreeBSD 5.3 REL. For example, I try to create boot.flp using dd(1). First I test the .flp file: orr:/home/richard$ md5 boot.flp MD5 (boot.flp) = 1ec944b87da4e2eef835439215348e64 orr:/home/richard$ grep boot.flp CHECKSUM.MD5 MD5 (boot.flp) = 1ec944b87da4e2eef835439215348e64 orr:/root# dd if=boot.flp of=/dev/fd0 dd: /dev/fd0: Input/output error 37+0 records in 36+0 records out 18432 bytes transferred in 4.518355 secs (4079 bytes/sec) This is a problem. I then boot into FreeBSD 5.2.1 under FreeSBIE. Using the same floppy disk and same physical hardware, I am successful: root@FreeSBIE:~# dd if=boot.flp of=/dev/fd0 2880+0 records in 2880+0 records out 1474560 bytes transferred in 48.104081 secs (30654 bytes/sec) root@FreeSBIE:~# mount /dev/fd0 /mnt root@FreeSBIE:~# ls /mnt .snap boot kernel.gz.split acpi.ko.gz kernel.gz.boot mfsroot.gz I am able to mount floppies and read them under FreeBSD 5.3, however. I have not had problems with earlier FreeBSD versions, until 5.3 REL. Hardware is an IBM Thinkpad a20p. Thank you. >How-To-Repeat: Try to use dd(1) to create floppies under FreeBSD 5.3 REL. >Fix: Unknown. >Release-Note: >Audit-Trail: >Unformatted:
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