TIP: Resolving grub-probe warning message on libata transition
I have been using my hard drive since last 2 years for various trial and error purpose (don’t we all love that!). I keep shifting my hard drive to different types of machines belonging to different architectures. One fine day I suddenly started noticing the following message (in red) whenever I use to upgrade/install/un-install a kernel:
Running depmod.
Running postinst hook script update-grub.
Searching for GRUB installation directory ... found: /boot/grub
warning: grub-probe can't find drive for /dev/sda1.
Please check /boot/grub/device.map, you might have to regenerate it with grub-mkdevicemap.
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Found kernel: /boot/vmlinuz-2.6.30-1-test1
Found kernel: /boot/vmlinuz-2.6.30-1-atom-test2
Found kernel: /boot/vmlinuz-2.6.30-1-686
Updating /boot/grub/menu.lst ... done
Basically any program that initiates a GRUB hook, causes the to generate above message.
The Solution
All you need to do to fix the above message is to issue the following command:
grub-mkdevicemap
which basically re-generates the /boot/grub/device.map file for you.
Earlier the contents of this file were:
debian:~# less /boot/grub/device.map
(hd0) /dev/hda
(hd1) /dev/hdb
(hd2) /dev/hdc
After the fix the contents were:
debian:~# less /boot/grub/device.map
(hd0) /dev/sda
Basically my system did a transition from hdX->sdX and the GRUB device map file became invalid. Also on my earlier system I had 3 IDE hard drives but on my new system I just had one IDE hard drive which uses the newer LIBATA driver in the kernel. More on this “libata” stuff in my future posts.
That’s it!
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August 18th, 2009 at 7:20 am
Thank you so much I have been to at least 10 sites looking for this?
Where do you guys get this info from?
Do not say man grub!!
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Admin Reply:
September 23rd, 2009 at 10:59 pm
No not from “man grub”. Little bit of experience and some guessing work helps..:)
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January 1st, 2010 at 9:48 am
Thanks much! I’ve searched countless forums, some of them more than once.. This helps. Happy New Year!
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