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/dev/-related errors, "Filesystem Check Failed"

Hello community,

I'm trying to get crux 2.8 up and running and I've always run into some issue or another. Usually, it involves a kernel panic along the lines of "VFS: not syncing", which I thought I narrowed down to an ATA/IDE driver issue with the kernel but never was able to solve it despite my attempts. I decided to give it another go on a different (but similar) machine:

Dell Inspiron B130 (laptop)
Pentium M
Intel GMA integrated graphics
IDE hard drive

Here's what's going on:

Code:

LILO Loading crux..................................

BIOS data check successful

EXT3-fs (sda1): error: couldn't mount because of unsupported optional features (240)

EXT4-fs (sda1): couldn't mount as ext due to feature incompatibilities

INIT: version 2.88 booting

The system is coming up. Please wait.

mount: unknown filesystem type 'devtmpfs'

cannot open /dev/null

udevd[970]: cannot open /dev/null



udevd[1004]: open /dev/null failed: Read-only file system



udevd[1003]: open /dev/null failed: Read-only file system



error: /dev/loop0: No such file or directory



[...]

...and the messages continue. I guess the /dev/ tree isn't being created. After more /dev/-related messages scroll by, I see:

Code:

********************* FILESYSTEM CHECK FAILED ***************************



Please repair manually and reboot. Note that the root file system is currently mounted read-only. To remount it read-write type: mount -n -o remount,rw /

When you exit the maintainance shell the system will reboot automatically.



*******************************************************************

Initially I thought this was due to devtmpfs being excluded from the kernel. Sure enough, it was. I changed my .config as follows:

Code:

CONFIG_DEVTMPFS=y

CONFIG_DEVTMPFS_MOUNT=y

(just to be safe). Recompile kernel, and still the same thing. :confused:

/etc/fstab

Code:

/dev/sda1      /              ext4        defaults        0    1

# I tried with the following line commented and not commented, still errors:

#devpts        /dev/pts        devpts      defaults        0    0

/etc/lilo.conf

Code:

lba32

install=text

boot=/dev/sda

image=/boot/vmlinuz

  label=crux

  root=/dev/sda1

  read-only

  append="quiet"

/etc/rc.conf

Code:

FONT=default

KEYMAP=us

TIMEZONE=UTC

HOSTNAME=b130

SYSLOG=sysklogd

SERVICES=(net crond)

P.S. Something definitely going on with the /dev/ tree. Check it out:

ls -A /dev

Code:

console initctl null pts shm

Code:

EXT3-fs (sda1): error: couldn't mount because of unsupported optional features (240)

EXT4-fs (sda1): couldn't mount as ext due to feature incompatibilities

It looks like
1. You didn't load the initrd when you needed to, or
2. Your kernel is incorrect, lacking ext4 support. Filesystem support needs to be compiled into the kernel or supplied by an initrd.

Hey, business_kid. Thanks for your reply.

Quote:

Originally Posted by business_kid (Post 5302292)

2. Your kernel is incorrect, lacking ext4 support. Filesystem support needs to be compiled into the kernel or supplied by an initrd.

I think I had this part right:

$ grep -i ext4 /usr/src/linux-3.5.4/.config

Code:

CONFIG_EXT4_FS=y

CONFIG_EXT4_USE_FOR_EXT23=y

CONFIG_EXT4_FS_XATTR=y

# CONFIG_EXT4_FS_POSIX_ACL is not set

# CONFIG_EXT4_FS_SECURITY is not set

# CONFIG_EXT4_DEBUG is not set

Quote:

Originally Posted by business_kid (Post 5302292)

1. You didn't load the initrd when you needed to

I think I understand the basic concept of what initrd/initramfs does, but I don't know how to even begin troubleshooting this aspect. What would you recommend? Thanks.

The basic concept of an initrd is that it loads on / and supplies kernel modules. Useful for distros trying to cater for all types of systems. When you mount the / filesystem, on / you mount over the initrd and it vanishes. Modules then used are your ones in /lib/modules. You only need an initrd if you need extra modules on bootup.

This is a better line for /dev/pts

Code:

devpts /dev/pts devpts gid=5,mode=620 0 0

Now, presuming that fixes nothing, your error is

Code:

EXT3-fs (sda1): error: couldn't mount because of unsupported optional features (240)

EXT4-fs (sda1): couldn't mount as ext due to feature incompatibilities

Which tells me there are extra features enabled on your ext4 system (maybe ACLS?) that you have no support for. That is unusual if a distro install made the ext4 partition, and supplied the kernel. If this is a home built kernel, bets are off. It may be a disk fault. Can you fsck it?

Quote:

Originally Posted by business_kid (Post 5303048)

Okay, so if I understand correctly, I don't necessarily need one in this case, becase (I think) all necessary features are included in the kernel and not in loadable modules.

Quote:

Originally Posted by business_kid (Post 5303048)

This is a better line for /dev/pts

Code:

devpts /dev/pts devpts gid=5,mode=620 0 0

Okay, changed. Same result.

Quote:

Originally Posted by business_kid (Post 5303048)

Assuming "ACLS" is the same as "ACL" in my last post, it is not enabled (see the snipped of my .config. It is indeed a homebuilt kernel. I booted off a CD and ran fsck, and everything seems alright as far as I can tell:

# e2fsck /dev/sda1

Code:

e2fsck 1.42.5 (29-Jul-2012)

/dev/sda1: clean, 77116/4890624 files, 66782/19537430 blocks

I am starting to wonder if this is actually a hardware issue, since I tried the same install on a handful of other similar systems and they had a different error (pretty much the same result on all the rest, except this one). I'll try a different distro on here and see how it behaves with disk access. Thanks for your help.

Code:

# e2fsck /dev/sda1

That only does something if the disk was unclean. Try this

Code:

# e2fsck -fvy /dev/sda1