"Wrong ufstype may corrupt your filesystem" - Should I be worried?

kernel ufs syslog data-loss

7,978

Solution 1

This message could be generated when the user or a script runs the update-grub script, which would explain why you get it after kernel update. From what i understood, update-grub tries to dynamically find all the possible partitions and operating systems in them for generating the most complete grub.conf file. one of the options(one of the last ones actually) that update-grub tries for mounting an unknown partition, is ufs. This is a bug however as it could be misleading and confuse the user.

More info: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1374759

Solution 2

I got this error and I fixed it updating to kernel 3.19.0-26. I think it was some bug in 3.19.0-25.

Solution 3

This is a bit "me too" but I saw this during a different kernel upgrade to 4.2 (most recent at time of writing)

Seems some installation code (acer recovery partition) tries to mount all partitions including a partition that should not be mounted /dev/sda4 which is an extended partition block created to have more than 4 partitions on a disk. Its not just UFS, the script tries to mount it as ext4, fat, and some others, each have a different error message, only the UFS error message looks a bit scary.

So I think this is a cosmetic issue and the messages can be ignored.

7,978

Admin

Updated on September 18, 2022

Comments

Admin over 1 year
I was just now looking through /var/log/syslog and I found these line which worried me:
```
ufs: You didn't specify the type of your ufs filesystem
May  5 09:06:09 Bath-Towel kernel: [  425.626221] 
May  5 09:06:09 Bath-Towel kernel: [  425.626221] mount -t ufs -o ufstype=sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...
May  5 09:06:09 Bath-Towel kernel: [  425.626221] 
May  5 09:06:09 Bath-Towel kernel: [  425.626221] >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old
```
What is it, what does it mean, and what should I do about it (if anything)? If more information is needed to answer my question, please just comment and I will provide it.

OS Information:
```
Description:    Ubuntu 15.04
Release:    15.04
```
- Admin about 9 years
  
  It would be nice if instead of just downvoting if people could actually say what is wrong and what information needs to be added.
- A.B. about 9 years
  
  +1 but maybe ">>>WARNING<<< "?
- Henning Kockerbeck about 9 years
  
  The log entries spell it out pretty clearly, IMHO: One of the file systems you've got mounted (harddisk partitons, flash drives, cd-rom, dvds or whatnot) is formatted as UFS. But UFS comes in several types, and you didn't provide which of those your file system is. You need to add the option ufstype=whichevertype to the mount info for that file system. Chances are that info's coming from your fstab. Check your file systems and their types with df -T on the command line.
- Admin about 9 years
  
  @HenningKockerbeck I have no mounted file system which is formatted as UFS.
- Mausy5043 almost 9 years
  
  I have the same "problem" and would love to see this answered. I do notice that these message begin after new a new kernel is installed with apt-get upgrade. They go away when I reboot.
- Mausy5043 almost 9 years
  
  Could this be grub related?
- Mausy5043 almost 9 years
  
  Is this a description of the problem? : bugs.launchpad.net/ubuntu/+source/linux/+bug/1374759
- Admin almost 9 years
  
  @Mausy5043: I think so as those are more or less the same errors I see.
Alex over 8 years

If you could find a link to the bug report where it was reported as fixed then I would be happy to accept this answer.