Comment 8 for bug 1637779

We have an error quiet similar to this one reported.
We are using Ubuntu 14.04 .. but I really think it's not a matter of version though.

We are getting randomly the following errors:
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[97030.025645] EXT4-fs error (device sdb5): ext4_iget:4156: inode #26351669: comm apache2: checksum invalid
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It's more than one, just to keep it short ;)
All of them are related to the same device sdb5, which we mount the '/var' partition.

Having this errors, and trying to reboot, it gets stuck booting up when it tries to mount the '/var' partition, informing that errors have been found checking the partition.
It shows up with different options (I (ignore) ,S (avoid mounting) ,M (fix manually). Either 'S' or 'M' are able to mount the partition without any trouble. But it's in every boot.

We have tried to boot up from USB recovery tool, and repair those errors executing the following command: `e2fsck -y /dev/sdb5` with the result I attached.

We have done it a couple of times, and after a random time these errors have showed up again. We also changed the disk (moving all the data from one to another) and it still happens the same.

We would like to know the reason why it happens so randomly. And of course how to avoid those errors forever!