Subject: Re: MBR and Logitech USB mouse.
From: civileme (civileme@mandrakesoft.com)
Date: Thu Jun 13 2002 - 22:23:55 AKDT
On Thursday 13 June 2002 01:22 am, Brian ThunderEagle wrote:
> I gave up on it. I had nothing to lose so I just restarted. But it is still
> something I would like to know in the future. Had there been any important
> information on the drive I would have lost it all. So would still like to
> know if there is anyway to fix this kind of a problem.
>
>
> -----Original Message-----
> From: aklug-bounce@aklug.org [mailto:aklug-bounce@aklug.org]On Behalf Of
> bryan@ak.net
> Sent: Wednesday, June 12, 2002 5:21 PM
> To: aklug@aklug.org
> Subject: Re: MBR and Logitech USB mouse.
>
>
>
> On Fri, Jan 01, 1999 at 11:52:22PM -0900, Brian ThunderEagle
>
> <aklug@arcadia.2y.net> wrote:
> > I decided to take this
> > moment to make my computer dual-boot with RedHat 7.2 and Windows 2000.
> > So,
>
> I
>
> > have everything up and running great. Both OS's are installed and I have
>
> Grub
>
> > set up to access both. However because of the way Dynamic diks work with
> > Windows 2000, and related hard drive 'stuff' I had to use Diskprobe to
>
> modify
>
> > the type ID. I made a mistake, but luckily I had the boot sector backed
>
> up. I
>
> > was able to restore the Primary partition boot sector, but now my Linux
> > partition is missing and I can't boot, because I was using Grub. So I can
> > either re-install everything, or I was hoping there was a feature in
> > Linux
>
> that
>
> > is equivalent to "fdisk /mbr" which is how I was able to restore the
>
> Windows
>
> > partition. So if anybody knows if it is possible to restore a missing
>
> Linux
>
> > Partition please let me know, I am going to continue to try and figure it
>
> out.
>
> I don't know if this will help or not, but....
> Keep in mind that each partition on a drive has its own boot sector
> at the beginning of the partition, but these are all separate from
> the MASTER boot record (MBR) at the very beginning of the disk. It's
> this MBR that is rewritten by 'fdisk /mbr', of course. I'm not
> familiar with Grub, but LILO can go either in the MBR, or a partition's
> boot sector.
>
> Immediately after the MBR, I believe, is the partition table, which
> specifies the Cylinder, Head, and Sector at which each partition
> begins and ends. So 'fdisk /mbr' will make the disk bootable, and
> is not specific to any one partition. Once that is good, you need
> to have a partition table that specifies where things are. Aside
> from that, whether or not you need anything special in the partition
> boot sectors depends on your method of bootloading.
>
> Does that help at all? Corrections from others are welcome.
For a missing partition IF you haven't moved any partition boundaries and
formatted the other partitions
Once again, tomsrtbt is your friend...
# fdisk /dev/hda
x
m
Now you will see a menu of things you can do with the partition table. But
you better have records that go by cylinder number and type.
Civileme
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This archive was generated by hypermail 2a23 : Thu Jun 13 2002 - 22:23:59 AKDT