我无法重新启动mysql。 journalctl -xe 提供以下输出

Oct 04 11:05:50 ubuntu audit[4075]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/4075/status" pid=4075 comm="mysqld" requested_mask="r"

Oct 04 11:05:50 ubuntu audit[4075]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" pid=4075 comm="mysqld" requested_

Oct 04 11:05:50 ubuntu audit[4075]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/4075/status" pid=4075 comm="mysqld" requested_mask="r"

Oct 04 11:05:50 ubuntu kernel: audit: type=1400 audit(1538631350.144:82): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/4075/status" pid=407

Oct 04 11:05:50 ubuntu kernel: audit: type=1400 audit(1538631350.144:83): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/"

Oct 04 11:05:50 ubuntu kernel: audit: type=1400 audit(1538631350.144:84): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/4075/status" pid=407

Oct 04 11:05:51 ubuntu sudo[4097]:   ubuntu : TTY=pts/0 ; PWD=/home/ubuntu ; USER=root ; COMMAND=/usr/sbin/smartctl -a /dev/sda

Oct 04 11:05:51 ubuntu sudo[4097]: pam_unix(sudo:session): session opened for user root by ubuntu(uid=0)

Oct 04 11:05:52 ubuntu sudo[4097]: pam_unix(sudo:session): session closed for user root

Oct 04 11:05:55 ubuntu kernel: ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x0

Oct 04 11:05:55 ubuntu kernel: ata3.00: irq_stat 0x40000001

Oct 04 11:05:55 ubuntu kernel: ata3.00: failed command: READ DMA EXT

Oct 04 11:05:55 ubuntu kernel: ata3.00: cmd 25/00:20:00:12:f3/00:00:53:00:00/e0 tag 24 dma 16384 in

                                        res 51/40:00:1e:12:f3/00:00:53:00:00/00 Emask 0x9 (media error)

Oct 04 11:05:55 ubuntu kernel: ata3.00: status: { DRDY ERR }

Oct 04 11:05:55 ubuntu kernel: ata3.00: error: { UNC }

Oct 04 11:05:55 ubuntu kernel: ata3.00: configured for UDMA/133

Oct 04 11:05:55 ubuntu kernel: sd 2:0:0:0: [sda] tag#24 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE

Oct 04 11:05:55 ubuntu kernel: sd 2:0:0:0: [sda] tag#24 Sense Key : Medium Error [current] [descriptor]

Oct 04 11:05:55 ubuntu kernel: sd 2:0:0:0: [sda] tag#24 Add. Sense: Unrecovered read error - auto reallocate failed

Oct 04 11:05:55 ubuntu kernel: sd 2:0:0:0: [sda] tag#24 CDB: Read(10) 28 00 53 f3 12 00 00 00 20 00

Oct 04 11:05:55 ubuntu kernel: blk_update_request: I/O error, dev sda, sector 1408438814

Oct 04 11:05:55 ubuntu kernel: ata3: EH complete

Oct 04 11:05:56 ubuntu systemd[1]: mysql.service: Main process exited, code=exited, status=3/NOTIMPLEMENTED