Need Help Editing Grub OOPS! Screw up...
kitepilot at kitepilot.com
kitepilot at kitepilot.com
Mon Jan 25 12:14:48 MST 2010
>> not sure why my boot partition is hda5,
Because is /dev/hda1 "logical"!
> Device Boot Start End Blocks Id System
> /dev/hda1 1 24321 195358401 5 Extended
If you had asked me, I'd have said that that would not work!
Maybe your Linux installation didn't read the manual... :)
Go figure, if it ain't broke, don't fix it...
Glad you got it going...
ET
PS: http://www.supergrubdisk.org/ does wonders too...
Mark Phillips writes:
> Kitepilot,
>
> Thanks for the offer of "phone support". At this point not sure why my boot
> partition is hda5, but it is.
>
> Disk /dev/hda: 200.0 GB, 200049647616 bytes
> 255 heads, 63 sectors/track, 24321 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Disk identifier: 0x00069357
>
> Device Boot Start End Blocks Id System
> /dev/hda1 1 24321 195358401 5 Extended
> /dev/hda5 * 1 24072 193358277 83 Linux
> /dev/hda6 24073 24321 2000061 82 Linux swap / Solaris
>
> Disk /dev/hdb: 250.0 GB, 250059350016 bytes
> 255 heads, 63 sectors/track, 30401 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Disk identifier: 0x00000000
>
> Disk /dev/hdb doesn't contain a valid partition table
>
> Probably set it up wrong in the first place a couple of years ago. I just
> followed the netinstall CD for Debian. Anyway, I am in now and moving on to
> fdisk the new drive and rsync my backups from another computer, and setup my
> backups to run here.
>
> Cheers!
>
> Mark
>
> On Mon, Jan 25, 2010 at 10:51 AM, kitepilot at kitepilot.com <
> kitepilot at kitepilot.com> wrote:
>
>> I believe "setup(hd1,4)" is wrong.
>> Should be "setup(hd1)"
>>
>> I also wonder how you make "root(hd1,4)" work, cuz partitions are counted
>> from 0 and only 0-3 are "physical" partitions.
>> Beyond that, they are "logical" partitions, and I don't recall to have ever
>> booted from a "logical" partition.
>>
>> Finally, make sure that whichever partition you are booting from is flagged
>> as bootable.
>> Feel free to post the output of
>> cat /proc/partitions
>> and
>> sudo fdisk -l /dev/sda
>> (or whatever HD you plan to boot from)
>>
>> If the BIOS recognizes the HD and partitions, and still doesn't boot, we
>> are
>> facing and enless permutations of unknowns...
>> I'd suggest you boot from a CD, start and SSH server, give me login
>> credentials (make sure you get a public IP or you "poke a hole" in your
>> router) and I'll walk you through over the phone and a "screen" session.
>> I've done 46591274 GRUBs.
>>
>> The statement above is fairly dense, feel free to ask... :)
>> ET
>>
>>
>>
>>
>>
>>
>> Mark Phillips writes:
>>
>> > Kitepilot,
>> >
>> > Well, I did this....
>> > grub
>> > root(hd1,4) - got an appropriate message like "found something"
>> > setup(hd1,4) -- got a bunch of messages that looked right - basically
>> > confirming it found everything
>> > quit
>> >
>> > Initially, I tried root(hd1,0) and got an error message; also setup (hd1)
>> > and got an error message. BTW root(hd1) also returns an error message.
>> The
>> > commands above were the only ones that worked without errors.
>> >
>> > I also change my fstab file as shown earlier (basically changed hdb to
>> hda).
>> > And the menu.lst was changed appropirately - hdb to hda as I posted
>> earlier.
>> >
>> > Moved the disk from ide2 to ide1, and installed the new blank disk in
>> ide2.
>> >
>> > Booted up, and no boot, just a black screen. I made sure the jumpers were
>> > set for master on ide1 and slave on ide2. ide1 has the linux drive and
>> ide2
>> > has the new blank drive.
>> >
>> > Checked the bios to see if both drives are recognized, and they are, and
>> in
>> > the right spots as well.
>> >
>> > Currently downloading most recent knoppix image to burn a cd and see
>> what's
>> > up. Any suggestions would be appreciated.
>> >
>> > Mark
>> >
>> > On Mon, Jan 25, 2010 at 9:06 AM, kitepilot at kitepilot.com <
>> > kitepilot at kitepilot.com> wrote:
>> >
>> >> > grub
>> >> > root (hd1,0)
>> >> > root (hd1)
>> >> NO
>> >>
>> >> grub
>> >> root (hd?,?)
>> >> setup (hd?)
>> >> ^^^^^
>> >> Sorry...
>> >> ET
>> >>
>> >>
>> >>
>> >>
>> >> Mark Phillips writes:
>> >>
>> >> > kitepilot,
>> >> >
>> >> > Thanks for the clarification.
>> >> >
>> >> > Sorry to be such a newbie.....You wrote
>> >> > grub
>> >> > root (hd1,0)
>> >> > root (hd1)
>> >> > It should answer that it found the stages, verify that there are no
>> >> errors.
>> >> > quit
>> >> >
>> >> > Should it be
>> >> > grub
>> >> > root (hd1,4)
>> >> > root (hd1)
>> >> > It should answer that it found the stages, verify that there are no
>> >> errors.
>> >> > quit
>> >> >
>> >> > because "find /boot/grub/stage1" returns (hd1,4) and not (hd1,0)? Or,
>> >> > perhaps it doesn't matter, and grub will do the right thing when I use
>> >> > (hd1,0)?
>> >> >
>> >> > Thanks!
>> >> >
>> >> > Mark
>> >> >
>> >> > On Mon, Jan 25, 2010 at 7:06 AM, kitepilot at kitepilot.com <
>> >> > kitepilot at kitepilot.com> wrote:
>> >> >
>> >> >> >> is there perhaps, a typo?
>> >> >> No, it's not a typo!
>> >> >> The drive is still hd1 until you pull the old one.
>> >> >> Grub doesn't know about which drive, the BIOS tell it to.
>> >> >> Once you pull the M$ drive and flip the cables, GRUB will see it as
>> hd0.
>> >> >> ET
>> >> >>
>> >> >>
>> >> >>
>> >> >> Mark Phillips writes:
>> >> >>
>> >> >> > I understand the flow....shouldn't I tell grub somehow that the new
>> >> boot
>> >> >> > drive is hd0,0? In your steps below, is there perhaps, a typo?
>> >> >> >
>> >> >> > Thanks!
>> >> >> >
>> >> >> > Mark
>> >> >> >
>> >> >> > On Sun, Jan 24, 2010 at 3:58 PM, kitepilot at kitepilot.com <
>> >> >> > kitepilot at kitepilot.com> wrote:
>> >> >> >
>> >> >> >> >> 1. How do I change grub on the Linux drive (hdb) to say "the
>> ...
>> >> >> >> If you are running GRUB 0.XX (GRUB 1.XX is different):
>> >> >> >> Boot your Debian machine and as root run:
>> >> >> >> grub
>> >> >> >> root (hd1,0)
>> >> >> >> root (hd1)
>> >> >> >> It should answer that it found the stages, verify that there are
>> no
>> >> >> errors.
>> >> >> >> quit
>> >> >> >>
>> >> >> >>
>> >> >> >> Then take a backup of /boot/grub/menu.lst and and make sure that
>> >> >> everything
>> >> >> >> is either using UUID(s) or labels or every reference to hd1,0 is
>> >> >> converted
>> >> >> >> to hd0,0
>> >> >> >>
>> >> >> >> Verify your /etc/fstab likewise.
>> >> >> >>
>> >> >> >>
>> >> >> >> > 2. Do I move the second drive to the first ide port, or leave it
>> as
>> >> >> ...
>> >> >> >> Shutdown, pull the cable from the windoze drive and plug it to
>> Linux
>> >> >> drive.
>> >> >> >> Turn on and pray... :)
>> >> >> >> Free advice, you can't sue me ;-)
>> >> >> >> YMMV
>> >> >> >> ET
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >> Mark Phillips writes:
>> >> >> >>
>> >> >> >> > I have two ide drives in one machine - drive 1 is a Windows
>> drive
>> >> and
>> >> >> >> drive
>> >> >> >> > 2 is a Linux drive. Using grub, I can boot into either windows
>> or
>> >> >> debian.
>> >> >> >> I
>> >> >> >> > want to remove the windows drive and replace it with a larger,
>> >> blank
>> >> >> >> drive
>> >> >> >> > for backup storage. I have a feeling if I just remove the first
>> >> drive
>> >> >> and
>> >> >> >> > put the new one there, the machine will not boot, since the MBR
>> is
>> >> >> >> probably
>> >> >> >> > on the first drive (it came with the machine, and I just added
>> the
>> >> >> second
>> >> >> >> > drive for Linux). My questions:
>> >> >> >> >
>> >> >> >> > 1. How do I change grub on the Linux drive (hdb) to say "the
>> >> windows
>> >> >> >> drive
>> >> >> >> > is dead, boot here instead, long live linux"?
>> >> >> >> >
>> >> >> >> > 2. Do I move the second drive to the first ide port, or leave it
>> as
>> >> >> the
>> >> >> >> > second ide drive and put the new drive in the fist ide port?
>> >> >> >> >
>> >> >> >> > Thanks!
>> >> >> >> >
>> >> >> >> > Mark
>> >> >> >> ---------------------------------------------------
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