Header RSS Feed
 
If you only want to see the articles of a certain category, please click on the desired category below:
ALL Android Backup BSD Database Hacks Hardware Internet Linux Mail MySQL Monitoring Network Personal PHP Proxy Shell Solaris Unix Virtualization VMware Windows Wyse

Grub2 install fails on USB drive with error: appears to contain a ufs1 filesystem
Friday - Sep 28th 2018 - by - (0 comments)

In my previous article (How to compare speed of USB flash pen drives) I briefly mentioned I had to reinstall the OS of my NAS-server on a USB flash drive. When I did so, the last step in the Debian installer (install grub2) failed, but without a clear error message. Because I was in a hurry back then, I installed LILO as bootloader. This worked and the NAS booted correctly.

Now it was time to investigate and on the running Debian OS I tried to install grub2:

root@nas:~# apt-get install grub2
Reading package lists... Done
Building dependency tree      
Reading state information... Done
The following NEW packages will be installed:
  grub2
0 upgraded, 1 newly installed, 0 to remove and 6 not upgraded.
Need to get 2,476 B of archives.
After this operation, 16.4 kB of additional disk space will be used.
Get:1 http://ftp.ch.debian.org/debian stretch/main amd64 grub2 amd64 2.02~beta3-5 [2,476 B]
Fetched 2,476 B in 0s (38.7 kB/s)
Selecting previously unselected package grub2.
(Reading database ... 28456 files and directories currently installed.)
Preparing to unpack .../grub2_2.02~beta3-5_amd64.deb ...
Unpacking grub2 (2.02~beta3-5) ...
Setting up grub2 (2.02~beta3-5) ...

So the installation of the package itself worked. What about the grub install?

root@nas:~# grub-install /dev/sde
Installing for i386-pc platform.
grub-install: error: hostdisk//dev/sde appears to contain a ufs1 filesystem which isn't known to reserve space for DOS-style boot.  Installing GRUB there could result in FILESYSTEM DESTRUCTION if valuable data is overwritten by grub-setup (--skip-fs-probe disables this check, use at your own risk).

When I was searching for this error I came across a Linux mint bug (grub-install fails on drive that previously had ufs2 installed). This is a true fact for the USB drive I'm using in the NAS server, it was previously used as a simple USB pen drive. So I tried to use the --skip-fs-probe parameter:

root@nas:~# grub-install /dev/sde --skip-fs-probe
Installing for i386-pc platform.
grub-install: warning: Attempting to install GRUB to a disk with multiple partition labels.  This is not supported yet..
grub-install: warning: Embedding is not possible.  GRUB can only be installed in this setup by using blocklists.  However, blocklists are UNRELIABLE and their use is discouraged..
grub-install: error: will not proceed with blocklists.

Now I was at the same point as in the mentioned bug report.

I decided to wipe the first 2047 sectors of the flash drive:

root@nas:~# dd if=/dev/zero of=/dev/sde bs=512 seek=1 count=2047
2047+0 records in
2047+0 records out
1048064 bytes (1.0 MB, 1.0 MiB) copied, 0.111457 s, 9.4 MB/s

Now there shouldn't be anything left to cause a grub-install hiccup. Let's try it again:

root@nas:~# grub-install /dev/sde
Installing for i386-pc platform.
Installation finished. No error reported.

Hurray! Oh and wow, the NAS boots so much faster with grub2 than with ILO (haven't used ILO since 2005...)

 

Add a comment

Show form to leave a comment

Comments (newest first):

No comments yet.

Go to Homepage home
Linux Howtos how to's
Monitoring Plugins monitoring plugins
Links links

Valid HTML 4.01 Transitional
Valid CSS!
[Valid RSS]

7028 Days
until Death of Computers
Why?