Today, I got the same error after the boot, more or less with three minutes in use.
The filesystem is remounted read-only and the messages like that are showed (Dmesg did not save the log because the filesystem become read only) Aborting journal on device sda5-8. EXT4-fs (sda5): Remounting filesystem read-only EXT4-fs (sda5): delayed block allocation failed for inode 527890 at logical offset 0 with max blocks 1 with error -30 This should not happen!! Data will be lost Once data will be lost, I think the severity should be changed to grave, shouldn't? The system stopped and I had to restart the system using a live CD and fix the partition. There is a similar bug in Ubuntu: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/528981
