Kernel error messages at boot

gdesilva · 2015-01-25 08:55:04

I installed the latest cooking version on my old P4 machine. Everything looks OK except for the fact that I get the following error message at boot.

Jan 25 18:40:35 (none) user.err kernel: EXT3-fs (sda1): error: couldn't mount because of unsupported optional features (240)

Jan 25 18:40:35 (none) user.err kernel: EXT4-fs (sda1): couldn't mount as ext2 due to feature incompatibilities

As mentioned despite this error message system proceeds with the boot and everything works just fine.

Curious to know what is the reason for this and how to get rid of it.

Many thanks

sixofeight · 2015-01-25 12:01:47

it's trying to determine what kind of file system sda1 contains:

When mounting the filesystem the kernel tries mounting it with all available

FS drivers until one succeeds.

ext3 is tried before ext4 and you get that error when it fails.

(unsupported optional features were actually normal ext4 features)

IMO it's nothing to worry about...to get rid of it, I found the suggestion

to add "rootfstype=ext4" to the kernel command line.

gdesilva · 2015-01-26 02:45:07

@sixofeight, Thanks for the explanation and rootfstype=ext4 in command line worked like a charm.

Sidini · 2015-01-28 22:21:06

Hi folks!

How can I add "rootfstype=ext4" to kernel? What file should I modify to eliminate these messages?

Thanks in advance.

gdesilva · 2015-01-29 00:07:17

@sidini, edit /boot/grub/menu.lst (as root). Add "rootfstype=ext4" to the end of the command line starting with 'kernel'. Save file.

Sidini · 2015-01-29 23:06:01

Thanks, gdesilva!!

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