Размонтирования Ecryptfs когда-либо полчаса или поэтому после домашнего раздела работали полный

Неделю назад мой домашний раздел (зашифрованный с ecryptfs, настроенным в процессе установки), работал полный. Я удалил некоторые файлы, поэтому теперь существует много пространства снова. Но по некоторым причинам, ecryptfs файловая система случайным образом размонтировалась.

Если это происходит, я просто работаю ecryptfs-mount-private, введите мой пароль, и все прекрасно снова в течение некоторого времени, но затем он размонтировался снова.

Какая-либо идея, что могло быть неправильным там и как зафиксировать это?

Вот мои /var/log/syslog строки в течение периода времени, в течение которого произошла проблема:

Aug 26 16:35:01 jost-desktop CRON[3070]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Aug 26 16:38:58 jost-desktop systemd[1]: Started CUPS Scheduler.
Aug 26 16:38:58 jost-desktop colord[1378]: (colord:1378): Cd-WARNING **: failed to get session [pid 3135]: No such device or address
Aug 26 16:38:58 jost-desktop colord[1378]: message repeated 2 times: [ (colord:1378): Cd-WARNING **: failed to get session [pid 3135]: No such device or address]
Aug 26 16:39:01 jost-desktop CRON[3146]: (root) CMD (  [ -x /usr/lib/php5/sessionclean ] && /usr/lib/php5/sessionclean)
Aug 26 16:41:13 jost-desktop systemd[1]: Starting Cleanup of Temporary Directories...
Aug 26 16:41:13 jost-desktop systemd-tmpfiles[3185]: [/usr/lib/tmpfiles.d/var.conf:14] Duplicate line for path "/var/log", ignoring.
Aug 26 16:41:14 jost-desktop systemd[1]: Started Cleanup of Temporary Directories.
Aug 26 16:45:01 jost-desktop CRON[3232]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Aug 26 16:51:58 jost-desktop systemd[1]: Started CUPS Scheduler.
Aug 26 16:51:58 jost-desktop colord[1378]: (colord:1378): Cd-WARNING **: failed to get session [pid 3301]: No such device or address
Aug 26 16:51:58 jost-desktop colord[1378]: message repeated 2 times: [ (colord:1378): Cd-WARNING **: failed to get session [pid 3301]: No such device or address]
Aug 26 16:55:01 jost-desktop CRON[3317]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)

Нет ничего связанного в dmesg (последняя запись от процесса начальной загрузки).

Обновление: я также проверил состояние SMART от всех дисков и там, кажется, не проблемы. Вывод от smartctl -a /dev/sdb:

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda 7200.14 (AF)
Device Model:     ST1000DM003-1CH162
Serial Number:    S1D8W76M
LU WWN Device Id: 5 000c50 05c382341
Firmware Version: CC46
User Capacity:    1.000.204.886.016 bytes [1,00 TB]
Sector Sizes:     512 bytes logical, 4096 bytes physical
Rotation Rate:    7200 rpm
Form Factor:      3.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 4
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Thu Sep 14 22:43:53 2017 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x82) Offline data collection activity
                    was completed without error.
                    Auto Offline Data Collection: Enabled.
Self-test execution status:      (   0) The previous self-test routine completed
                    without error or no self-test has ever 
                    been run.
Total time to complete Offline 
data collection:        (  575) seconds.
Offline data collection
capabilities:            (0x7b) SMART execute Offline immediate.
                    Auto Offline data collection on/off support.
                    Suspend Offline collection upon new
                    command.
                    Offline surface scan supported.
                    Self-test supported.
                    Conveyance Self-test supported.
                    Selective Self-test supported.
SMART capabilities:            (0x0003) Saves SMART data before entering
                    power-saving mode.
                    Supports SMART auto save timer.
Error logging capability:        (0x01) Error logging supported.
                    General Purpose Logging supported.
Short self-test routine 
recommended polling time:    (   1) minutes.
Extended self-test routine
recommended polling time:    ( 108) minutes.
Conveyance self-test routine
recommended polling time:    (   2) minutes.
SCT capabilities:          (0x3085) SCT Status supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   119   099   006    Pre-fail  Always       -       234006864
  3 Spin_Up_Time            0x0003   097   097   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   098   098   020    Old_age   Always       -       2479
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000f   084   060   030    Pre-fail  Always       -       4621305762
  9 Power_On_Hours          0x0032   081   081   000    Old_age   Always       -       16848
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   098   098   020    Old_age   Always       -       2506
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   098   000    Old_age   Always       -       6 7 20
189 High_Fly_Writes         0x003a   098   098   000    Old_age   Always       -       2
190 Airflow_Temperature_Cel 0x0022   065   049   045    Old_age   Always       -       35 (Min/Max 16/36)
191 G-Sense_Error_Rate      0x0032   100   100   000    Old_age   Always       -       0
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       216
193 Load_Cycle_Count        0x0032   099   099   000    Old_age   Always       -       3086
194 Temperature_Celsius     0x0022   035   051   000    Old_age   Always       -       35 (0 5 0 0 0)
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0010   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x003e   200   200   000    Old_age   Always       -       30
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       16941h+00m+06.008s
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       51949642453
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       40959708870

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%        82         -
# 2  Short offline       Completed without error       00%        17         -
# 3  Short offline       Completed without error       00%         9         -

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.