Re: Error during Install grub on img using loop devices

[Andrei Borzenkov]

В Sat, 27 Jun 2015 07:40:30 +0000
Divya Thaluru <address@hidden> пишет:

> Hi Andrei,
> 
> Good news I was able to install grub, but I have some issues.
> 

How did you install? In host or in chroot?

> 1)
> Grub-install and grub-mkconfig commands throw this error but both are
> completed.
> device-mapper: table ioctl on  failed: No such device or address
> 

Which version of grub?

> 2)I generate grub.cfg file using grub-mkconfig command. It generates
> grub.cfg file with loop devices as root. I have to go change manually. Is
> there any fix for it?
> 

What do you mean "root"? Could you attach grub.cfg?

> 3)If I add verbose option to grub-install, grub-install command won’t work
> and it just displays version info as output. Is there any patch for  this
> fix?
> 

Copy'n'paste would be good. But grub-install did not really support
--verbose as far as I remember; it was --debug.

> 4)At the time of boot, I am getting a following error message
> error: no symbol table
> 
> Loading Linux 3.19.2…. ...
> Press any key to continue ...
> 
> The system then proceeds to boot normally.
> 
> 

Do you boot on real hardware or QEMU (or similar) using just installed
image?
> 
> Thanks for your help...
> 
> Thanks,
> Divya
> 
> 
> On 6/26/15, 10:53 PM, "Divya Thaluru" <address@hidden> wrote:
> 
> >Hi Andrei,
> >
> >I am not building with device mapper. I will try and let you know. Thanks
> >for your help.
> >
> >Thanks,
> >Divya
> >
> >Sent from my iPhone
> >
> >> On Jun 26, 2015, at 10:47 PM, Andrei Borzenkov <address@hidden>
> >>wrote:
> >> 
> >> В Sat, 27 Jun 2015 05:25:12 +0000
> >> Divya Thaluru <address@hidden> пишет:
> >> 
> >>> Hi Andrei,
> >>> 
> >>> I tried with 2.02 beta also , I have seen similar error. I will try
> >>>with current stream and let you know.
> >> 
> >> I just yesterday tested exactly this when answering another mail (see
> >> archives). So I am absolutely sure it works in current upstream. What
> >> could go wrong, you need to link grub utilities with libdevmapper. Make
> >> sure configure summary shows "With devmapper support: Yes".
> >> 
> >>>>> 
> >>>>> losetup --show --find XXX.raw -> return /dev/loop0
> >>>>> kpartx -av /dev/loop0 -> adds maps loop0p1
> >>>>> mkfs.ext4 /dev/mapper/loop0p1
> >>>>> mount /dev/mapper/loop0p1 /mnt/work/chroot/
> >>>>> touch /mnt/work/chroot/dev/loop0
> >>>>> mount --bind /dev/loop0 /mnt/work/chroot/dev/loop0
> >>>>> mkdir -p  /mnt/work/chroot/dev/mapper/
> >>>>> touch /mnt/work/chroot/dev/mapper/loop0p1
> >>>>> mount --bind /dev/mapper/loop0p1 /mnt/work/chroot/dev/mapper/loop0p1
> >>>>> mount -t proc none /mnt/work/chroot/proc
> >>>>> mount -t sysfs none /mnt/work/chroot/sys
> >>>>> 
> >>>>> chroot /mnt/work/chroot
> >> 
> >> No, this probably won't work in any case. You need to bind mount
> >> full /dev into your chroot as well. Also there is really no need to use
> >> chroot at all, you can use grub-install
> >> --boot-directory=/mnt/chroot/boot
>