Re: error: no such disk

[Andrei Borzenkov]

В Sat, 14 Feb 2015 18:08:17 +0000
Chris Fisichella <address@hidden> пишет:

>   Quoting Andrei Borzenkov <address@hidden>:
> 
> > В Sat, 14 Feb 2015 04:49:18 +0000
> > Chris Fisichella <address@hidden> пишет:
> >
> >> Hi,
> >>
> >> I went through the archives and tried to apply the commands contained
> >> there
> >> in. I still can't get grub to hand off the computer to Debian 7.8.0.
> >>
> >> The install is "all files in one partition" Indeed, when I boot using
> the
> >> DVD 1 "rescue mode," I can get the software to open a shell for me on
> >> /dev/sda1, I can "ls" and see the file system. The grub config file is
> >> located at
> >>
> >> /boot/grub/grub.cfg
> >>
> >> I looked at /boot/grub/device.map and saw the (hd0) mapping looked
> funny,
> >> so I tried changing it to /dev/sda1, but it still will not pass off the
> >> images.
> >
> > device.map is irrelevant when booting although it could cause incorrect
> > image to be generated. Best is to remove it, it is not needed by grub2
> > under normal conditions.
> >
> >> I saw you can get to a grub prompt. I don't know how to do that with my
> >> setup. The machine just starts and after a few seconds, I get this:
> >>
> >> Grub Loading.
> >> Welcome to GRUB!
> >>
> >> error: no such disk
> >> Entering rescue mode
> >> grub rescue>
> >
> > Most likely you have old grub image on disk that refers to filesystem
> > that is no more present. You need to reinstall grub from rescue CD.
> > Boot with any live media, mount /dev/sda1 and run grub-install, like
> >
> > mount /dev/sda1 /mnt
> > mount --bind /sys /mnt/sys
> > mount --bind /proc /mnt/proc
> > mount --bind /dev /mnt/dev
> > chroot /mnt
> > grub-install /dev/sda
> >
> > As I said better is to remove device.map before running grub-install
> >
> > May Debian has some specific instructions how to recover bootloader in
> > which case you better ask them. Also above will make grub2 primary
> > bootloader; if you dual-boot you may want to install grub on partition.
> >
> >  
> 
> Hi Andrei,
> 
> Thanks for trying to help me out.
> 
> I tried to do most of what you wrote.
> 
> 1. I booted using the DVD 1 of the Debian distribution. They have a rescue
> mode, so I enabled it. That rescue mode allowed me to start a shell on
> /dev/sda1, which is the whole file system on one partition.
> 
> 2. I moved /boot/grub/device.map to /root/device.map.orig
> 
> 3. I ran:
> grub-install /dev/sda
> Installation finished. No error reported.
> 
> I rebooted without the DVD and it gave me the same no such disk error.
> 

Run
https://github.com/arvidjaar/bootinfoscript/raw/master/bootinfoscript
from rescue DVD and upload output to somewhere, e.g. pastebin. 

> As I was booting, I saw something flash by about a software RAID. There
> only one disk in this machine. Would that be causing problems?
> 
> Thanks,
> Chris