Date: Wed, 6 Sep 2000 12:42:33 +1000 (EST) From: =?iso-8859-1?q?Paul=20Jansen?= <vlaero@yahoo.com.au> To: questions@freebsd.org Subject: extracting bootblock from dos 6.22 boot floppy (FreeBSD 4.1) Message-ID: <20000906024233.6557.qmail@web5101.mail.yahoo.com>
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Hi, I would like to know how to extract a boot block from a floppy disk so I can create a bootable floppy image. I plan on making larger-than-floppy sized images to use to network boot machines using etherboot. It seems I must overcome this problem before I can get anywhere with this though. I've created a boot floppy from a working msdos 6.22 system using 'format a: /s /u'. I've used the command: dd if=/dev/fd0 of=/usr/tmp/bootblock bs=512 count=1 To verify that the bootblock is being extracted correctly these is what I doing: (1) extracting the boot block from a bootable floppy using the command above (2) Creating a floppy image using mformat and writing the extracted boot block to this image. To do this make sure the mtools package is installed. The edit the file ~/.mtoolsrc and add the line: drive x: file="/usr/tmp/floppyimage" then issue this command: mformat -C -t 80 -s 18 -h 2 -B /usr/tmp/bootblock x: (3) copying the msdos.sys, io.sys, and command.com files from the bootbale floppy to the newly created floppy image using mcopy: mcopy a:/io.sys a:/msdos.sys a:/command.com x:/ (4) writing this floppy image to another floppy disk and try booting a machine with it. dd if=/usr/tmp/floppyimage of=/dev/fd0 I believe this process should should allow this other floppy disk to be a bootable msdos 6.22 floppy after the steps described above are performed. This results in the error message: non-system disk or disk error replace and press any key when ready Can someone tell me what I'm doing wrong here? Thanks _____________________________________________________________________________ http://geocities.yahoo.com.au - Yahoo! Australia & NZ GeoCities - Build your own Web Site - for free! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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