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I'm running Ubuntu 18.04.2 LTS and it appears my Ubuntu kernel crashed with an error pointing to an EXT4-fs (sbd1): write access unavailable message on the terminal screen. In checking all my logs in /var/log after a reboot yields that at the time, a repeating list of ^@ characters appear to have started filling both my syslog and kernel log with no preceding messages pointing to an actual error. The strange part about this error message is that I have no sbd1 drive mounted. Thoughts?

I'm also seeing that I have no swap space activated. Not sure if that would cause an issue.

lsblk command

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  • status please...
    – heynnema
    Jul 13, 2019 at 19:10

1 Answer 1

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The ^@ characters that you see in /var/log/syslog are a byproduct of the kernel panic.

The sdb1 errors may come from a flash drive, phone, or external HDD/SSD, that's connected to a USB port, or from an incorrect entry in /etc/fstab.

For the swap space problem, edit your question and show me free -h and cat /etc/fstab and sudo blkid and sudo fdisk -l.

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