Telling grub to boot the second primary partition.

stf92 · 04-15-2018, 07:28 PM

Hi: I have just installed Slackware 14.2 64-bit to this machine, but the installer made a mistake when generating lilo.conf. He put boot=/dev/sda which is one of the USB port. So I edited it and put boot=/dev/mmcblk0 in its place. OK. But I'm running an Arch system, which has no lilo but only grub (or grub 2). So, how can I tell grub to boot the OS in the second partition? I.e. /dev/mmcblk0p2?

yancek · 04-15-2018, 07:49 PM

Take a look at the link below, Arch Linux Forums post 3 which explains how the person posting got it to boot. Has a sample menuentry also.

https://bbs.archlinux.org/viewtopic.php?id=97207

Darth Vader · 04-15-2018, 07:59 PM

Guys, did you realize the titanic effort made by @STF92 out of love for Slackware?

This guy tries since several weeks to install Slackware in his favorite 4GB partition from that eMMC drive...

perbh · 04-16-2018, 12:20 AM

Quote:

Originally Posted by Darth Vader

Guys, did you realize the titanic effort made by @STF92 out of love for Slackware?

This guy tries since several weeks to install Slackware in his favorite 4GB partition from that eMMC drive...

*lol*

Didier Spaier · 04-16-2018, 12:52 AM

deleted

rob.rice · 04-17-2018, 07:38 PM

Quote:

Originally Posted by stf92

Hi: I have just installed Slackware 14.2 64-bit to this machine, but the installer made a mistake when generating lilo.conf. He put boot=/dev/sda which is one of the USB port. So I edited it and put boot=/dev/mmcblk0 in its place. OK. But I'm running an Arch system, which has no lilo but only grub (or grub 2). So, how can I tell grub to boot the OS in the second partition? I.e. /dev/mmcblk0p2?

RTFM!
https://www.gnu.org/software/grub/gr...mentation.html

Fat_Elvis · 04-17-2018, 11:12 PM

Not very specific, but I'll give it a shot:

You don't need to chainload lilo from within GRUB. GRUB can boot any correctly installed GNU/Linux partition directly (with the exception of booting a x64 linux from 32-bit GRUB, if I recall correctly).

Try going into GRUB rescue mode: press 'c' during the boot-up menu. If no menu appears, you have to specify a timeout in the /boot/grub/grub.cfg file.

When inside the rescue prompt, issue command: 'ls', and check if you can find your Slackware boot and root partitions within the list. Then go with, for example: 'set root=(HD0,gpt1)' or 'set root=/dev/sdb1'.

Then find your linux image from within that, and input something like: 'linux /boot/vmlinuz root=/dev/sdb1 ro' and finally run the command: 'boot'. If your /etc/fstab is set up correctly, and with some luck, you should boot into the correct partition.

If this works, just add the correct entries into your grub.cfg file for next time.

I've had a huge amount of trouble with one of those eMMC drives in a laptop. Actually found it impossible to overwrite the recovery partition by any means available to me. If the computer has a SATA, mSATA, or NVMe port, best course might be to just plug in a regular store-bought drive.