Updating GRUB device.map file after adding a new disk

Recently I wrote about extending existing VG in LVM by adding new external hard disk on USB. Basically I covered the topic fully, although today during installation of new kernel (2.6.39 from squeeze-backports) I encounter some errors. It took my awhile while I found out, that the most important one is GRUB related:

update-grub
Generating grub.cfg ...
/usr/sbin/grub-probe: error: Couldn't find PV pv1. Check your device.map.

GRUB2 can read some information from LVM partitions – GRUB-legacy didn’t really care about disks in LVM, as he was unable to read from them. Anyway, I figured that the problem is in grub.cfg and in device.map – both files are located under /boot/grub. What’s the problem? Well, new added to existing VG and used only to extend existing LVs disk wasn’t recognized by GRUB (hence error message provided above). This error was due to lack of disk information provided in device.map file. What’s the solution? Pretty simple, actually:

mv /boot/grub/device.map /boot/grub/device.map.backup
grub-mkdevicemap
update-grub

That’s all! (:

OPNsense 24.1 →

Asides — February 16, 2024

OPNsense 24.1 releasedOPNsense 24.1 released Last summer I finally bit the bullet and decided to setup a firewall at home. I went with cheap Mini PC with dual NICs to serve this purpose. My initial choice of the operating system went to pfSense, but with all the drama

How fast is your shell? →

Asides — January 23, 2024

Thorsten Ball: Now you’re thinking: does it matter? 100ms? 200ms? Come on, dude. And I’m telling you: yes it matters. Of course it matters. Those who don’t honor the milliseconds will end up with seconds. 100%, it absolutely matters. Who wants to walk around with clown shoes

PPAs Updates

System Administration — December 13, 2023

Latest versions of BCC (v0.29.1) and libbpf (v1.3.0) are now available from the bpftrace PPA for bionic, focal and jammy. There's also latest bpftrace (0.19.0) available but only for jammy (I found it impossible to build reliably on anything older): sudo add-apt-repository

FreeBSD 14.0-RELEASE →

System Administration — December 06, 2023

FreeBSD 14.0-RELEASE Release NotesFreeBSD is an operating system used to power modern servers, desktops, and embedded platforms.The FreeBSD Project It definitely doesn't feel like over 2 years since the 13.0-RELEASE, but here we are. I'd love to write that this was yet another

Updating GRUB device.map file after adding a new disk

Author

Read next

OPNsense 24.1 →

How fast is your shell? →

PPAs Updates

FreeBSD 14.0-RELEASE →