errors.log

Expected from kernel log, dmesg:

EXT4-fs (sda1): warning: mounting unchecked fs, running e2fsck is recommended

end_request: I/O error, dev sda, sector 123456

Buffer I/O error on device sda1, logical block 123456

ata2.00: cmd 60/20:00:00:00:00/00:00:00:00:00/40 tag 0 ncq 16384 in
	 res 51/40:0f:11:00:00/1b:00:00:00:00/40 Emask 0x409 (media error) <F>

SError: { 10B8B Dispar }

Expected from /var/log/auth.log:

pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.31.116.11  user=root
Failed password for root from 116.31.116.11 port 16009 ssh2

System errors in numeric form:

error -1
error=2
errno=-3
errno=4
cifs_mount failed w/return code = -113