Hi all,
Reporting back after changing the hangcheck timer to 180 secs and
re-running checkarray. I got a number of rebuild events (see syslog
excerpts below and attached), and I see no signs of the hangcheck issue
in dmesg like I did last time.
I'm still getting the SMART OfflineUncorrectableSector and
CurrentPendingSector errors, however. Should those go away if the
rewrites were correctly carried out by the drive? Any thoughts on next
steps to verify everything is ok?
Thanks,
Allie
user@machine:/var/log$ cat syslog | grep Rebuild
Dec 19 12:48:18 machine mdadm[23296]: RebuildStarted event detected on
md device /dev/md/0
Dec 19 12:48:41 machine mdadm[23296]: Rebuild99 event detected on md
device /dev/md/0
Dec 19 12:48:41 machine mdadm[23296]: RebuildStarted event detected on
md device /dev/md/2
Dec 19 12:48:41 machine mdadm[23296]: RebuildFinished event detected on
md device /dev/md/0
Dec 19 14:12:02 machine mdadm[23296]: Rebuild22 event detected on md
device /dev/md/2
Dec 19 15:18:42 machine mdadm[23296]: Rebuild41 event detected on md
device /dev/md/2
Dec 19 16:42:02 machine mdadm[23296]: Rebuild62 event detected on md
device /dev/md/2
Dec 19 18:05:23 machine mdadm[23296]: Rebuild80 event detected on md
device /dev/md/2
Dec 19 20:02:09 machine mdadm[23296]: RebuildFinished event detected on
md device /dev/md/2
On 12/19/2017 12:02 PM, Phil Turmel wrote:
On 12/19/2017 05:35 AM, Alexander Shenkin wrote:
Ok, so, it's now my understanding that I would normally be ok, having
set the driver timeout to 180 secs (thus giving time for the seagate
drive to report the read error back up to the MD layer before 180 secs
is up). In my case, however, the kernel hangcheck timer is interrupting
the process (md?) that is waiting on the sector read at 120 secs.
Therefore, the writeback doesn't happen.
Yes. I think this behavior is a bug, and you need to work around it.
Thus, I should set the hangcheck to something > 120 (say, 180 secs -
should it be >180 to let the driver timeout first?). Does this sound
correct? Apologies if I'm repeating info from before - just trying to
be sure about what I'm doing before I go ahead and do it.
If that's correct, I'll add the following line in /etc/sysctl.conf:
kernel.hung_task_timeout_secs = 180
Yes. For your kernel.
I'll make sure the setting has taken, and then I'll run:
sudo /usr/share/mdadm/checkarray --idle --all
Makes sense. Please report your results for posterity when the scrub is
done.
Phil
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Dec 19 12:48:18 machinename mdadm[23296]: RebuildStarted event detected on md device /dev/md/0
Dec 19 12:48:19 machinename kernel: [1057980.859389] md: data-check of RAID array md0
Dec 19 12:48:19 machinename kernel: [1057980.859396] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
Dec 19 12:48:19 machinename kernel: [1057980.859399] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check.
Dec 19 12:48:19 machinename kernel: [1057980.859410] md: using 128k window, over a total of 1950656k.
Dec 19 12:48:19 machinename kernel: [1057981.785802] md: delaying data-check of md2 until md0 has finished (they share one or more physical units)
Dec 19 12:48:41 machinename kernel: [1058004.462362] md: md0: data-check done.
Dec 19 12:48:41 machinename kernel: [1058004.472905] md: data-check of RAID array md2
Dec 19 12:48:41 machinename kernel: [1058004.472910] md: minimum _guaranteed_ speed: 1000 KB/sec/disk.
Dec 19 12:48:41 machinename kernel: [1058004.472911] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check.
Dec 19 12:48:41 machinename kernel: [1058004.472917] md: using 128k window, over a total of 2920188928k.
Dec 19 12:48:41 machinename mdadm[23296]: Rebuild99 event detected on md device /dev/md/0
Dec 19 12:48:41 machinename mdadm[23296]: RebuildStarted event detected on md device /dev/md/2
Dec 19 12:48:41 machinename mdadm[23296]: RebuildFinished event detected on md device /dev/md/0
Dec 19 12:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 12:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 12:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 117 to 104
Dec 19 12:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 54 to 53
Dec 19 12:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 46 to 47
Dec 19 12:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 12:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 13:09:01 machinename CRON[677]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 13:17:01 machinename CRON[1297]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 19 13:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 13:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 13:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 53 to 50
Dec 19 13:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 47 to 50
Dec 19 13:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 13:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 13:39:01 machinename CRON[2821]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 13:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 13:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 13:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 104 to 119
Dec 19 13:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 50 to 49
Dec 19 13:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 50 to 51
Dec 19 13:55:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 13:55:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 14:09:16 machinename CRON[5303]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 14:12:02 machinename mdadm[23296]: Rebuild22 event detected on md device /dev/md/2
Dec 19 14:17:03 machinename CRON[5784]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 19 14:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 14:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 14:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 119 to 120
Dec 19 14:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 49 to 48
Dec 19 14:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 51 to 52
Dec 19 14:25:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 14:25:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 14:39:01 machinename CRON[7066]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 14:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 14:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 14:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 120 to 105
Dec 19 14:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 14:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 15:09:01 machinename CRON[10105]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 15:17:01 machinename CRON[10868]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 19 15:18:42 machinename mdadm[23296]: Rebuild41 event detected on md device /dev/md/2
Dec 19 15:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 15:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 15:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 105 to 119
Dec 19 15:25:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 15:25:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 15:39:02 machinename CRON[12435]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 15:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 15:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 15:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 48 to 47
Dec 19 15:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 52 to 53
Dec 19 15:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 15:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 16:09:01 machinename CRON[15876]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 16:14:28 machinename dhclient: DHCPREQUEST of 192.168.x.x on eth0 to 192.168.1.1 port 67 (xid=0x294df4f0)
Dec 19 16:14:28 machinename dhclient: DHCPACK of 192.168.x.x from 192.168.1.1
Dec 19 16:14:35 machinename dhclient: bound to 192.168.x.x -- renewal in 37501 seconds.
Dec 19 16:17:02 machinename CRON[16614]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 19 16:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 16:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 16:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 119 to 118
Dec 19 16:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 16:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 16:39:01 machinename CRON[18221]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 16:42:02 machinename mdadm[23296]: Rebuild62 event detected on md device /dev/md/2
Dec 19 16:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 16:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 16:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 118 to 116
Dec 19 16:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 16:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 17:09:02 machinename CRON[21316]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 17:17:03 machinename CRON[21836]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 19 17:25:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 17:25:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 17:25:46 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 116 to 108
Dec 19 17:25:47 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 17:25:47 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 17:39:05 machinename CRON[23185]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 17:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 17:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 17:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 108 to 117
Dec 19 17:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 47 to 48
Dec 19 17:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 53 to 52
Dec 19 17:55:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 17:55:46 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 18:05:23 machinename mdadm[23296]: Rebuild80 event detected on md device /dev/md/2
Dec 19 18:09:01 machinename CRON[25890]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 18:17:01 machinename CRON[26421]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 19 18:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 18:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 18:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 117 to 120
Dec 19 18:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 48 to 47
Dec 19 18:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 52 to 53
Dec 19 18:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 18:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 18:39:12 machinename CRON[27738]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 18:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 18:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 18:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 120 to 114
Dec 19 18:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 18:55:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 19:09:16 machinename CRON[31805]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 19:17:02 machinename CRON[322]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 19 19:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 19:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 19:25:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 114 to 117
Dec 19 19:25:47 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 19:25:47 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 19:39:01 machinename CRON[1738]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 19:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 19:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 19:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 47 to 48
Dec 19 19:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 53 to 52
Dec 19 19:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 19:55:45 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 20:02:08 machinename kernel: [1084008.008663] md: md2: data-check done.
Dec 19 20:02:09 machinename mdadm[23296]: RebuildFinished event detected on md device /dev/md/2
Dec 19 20:09:01 machinename CRON[4780]: (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -x /usr/lib/php5/sessionclean ] && [ -d /var/lib/php5 ] && /usr/lib/php5/sessionclean /var/lib/php5 $(/usr/lib/php5/maxlifetime))
Dec 19 20:17:01 machinename CRON[5577]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Dec 19 20:25:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Currently unreadable (pending) sectors
Dec 19 20:25:44 machinename smartd[2151]: Device: /dev/sda [SAT], 8 Offline uncorrectable sectors
Dec 19 20:25:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Prefailure Attribute: 1 Raw_Read_Error_Rate changed from 117 to 119
Dec 19 20:25:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 48 to 50
Dec 19 20:25:44 machinename smartd[2151]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 52 to 50
Dec 19 20:25:44 machinename smartd[2151]: Device: /dev/sda [SAT], previous self-test completed with error (read test element)
Dec 19 20:25:44 machinename smartd[2151]: Device: /dev/sda [SAT], Self-Test Log error count increased from 19 to 20
