Date: Sun, 13 May 2001 10:05:32 +0200 From: Gerhard Sittig <Gerhard.Sittig@gmx.net> To: freebsd-stable@FreeBSD.ORG Subject: Re: FreeBSD 4.3-STABLE Install problems, BOOT FAILURE after freshinstallation Message-ID: <20010513100532.K253@speedy.gsinet> In-Reply-To: <Pine.BSF.4.21.0105122133180.17454-100000@beastie.saturn-tech.com>; from drussell@saturn-tech.com on Sat, May 12, 2001 at 09:40:52PM -0600 References: <3AFDAA55.90BA01A1@home.com> <Pine.BSF.4.21.0105122133180.17454-100000@beastie.saturn-tech.com>
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On Sat, May 12, 2001 at 21:40 -0600, Doug Russell wrote: > > You can also always boot with a DOS diskette and use 'fdisk /mbr' to write > a standard bot manager to the disk, or copy the first sector from a good > disk to the offending one using something like (bs=512 should be default): > > 'dd if=/dev/xxx of=/dev/xxx bs=512 count=1' DANGER, Will Robinson! Do *not* copy all the 512 bytes from one MBR to another, since this way you will transfer boot code _plus_ the partition table. And I assume you don't want this to happen unless you want an identical layout for both disks. (Yes, I've been bitten by this mistake myself, that's why I know of the problems arising afterwards. :) There's two bytes of bootsect signature (0x55AA or 0xAA55) and four times 16 bytes for the partition entries. So you want to transfer 446 bytes only. virtually yours 82D1 9B9C 01DC 4FB4 D7B4 61BE 3F49 4F77 72DE DA76 Gerhard Sittig true | mail -s "get gpg key" Gerhard.Sittig@gmx.net -- If you don't understand or are scared by any of the above ask your parents or an adult to help you. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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