服务器上的所有网站都与数据库失去连接，这种情况现在每天早上都会发生。唯一的解决办法是使用电脑上的重启按钮重启服务器，因为服务器已经完全崩溃了。
Ubuntu 服务器版本Ubuntu 18.04.4 LTS
错误日志：
[85660.334392] systemd-journald[508]: Failed to rotate /var/log/journal/80dbc055 82ee4d1ea0fd6ba43ae7f381/system.journal: Read-only file system
[85660.334409] systemd-journald[508]: Failed to rotate /var/log/journal/80dbc055 82ee4d1ea0fd6ba43ae7f381/user-1000.journal: Read-only file system
[85660.334893] systemd-journald[508]: Failed to write entry (21 items, 690 bytes ), ignoring: Input/output error
[85660.335048] systemd-journald[508]: Failed to rotate /var/log/journal/80dbc055 82ee4d1ea0fd6ba43ae7f381/system.journal: Read-only file system
[85663.995342] sd 0:0:0:0: [sda] tag#18 FAILED Result: hostbyte=DID_BAD_TARGET d riverbyte=DRIVER_OK
[85663.995349] sd 0:0:0:0: [sda] tag#18 CDB: Read(10) 28 00 0d 7f 6b a0 00 00 80 00
[85663.995352] print_req_error: I/O error, dev sda, sector 226454432
[85663.995389] sd 0:0:0:0: [sda] tag#19 FAILED Result: hostbyte=DID_BAD_TARGET d riverbyte=DRIVER_OK
[85663.995392] sd 0:0:0:0: [sda] tag#19 CDB: Read(10) 28 00 0d 7f 6b a0 00 00 08 00
[85663.995395] print_req_error: I/O error, dev sda, sector 226454432
我不知道我还应该提供什么信息，但如果需要其他东西，我可以提供。
Smartool 报告：
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x02) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Disabled.
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: ( 0) seconds.
Offline data collection
capabilities: (0x7d) SMART execute Offline immediate.
No Auto Offline data collection support.
Abort 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: ( 48) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x0025) SCT Status supported.
SCT Data Table 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
1 Raw_Read_Error_Rate 0x0032 120 120 050 Old_age Always - 0/0
5 Retired_Block_Count 0x0033 100 100 003 Pre-fail Always - 0
9 Power_On_Hours_and_Msec 0x0032 083 083 000 Old_age Always - 154
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 633
171 Program_Fail_Count 0x000a 100 100 000 Old_age Always - 0
172 Erase_Fail_Count 0x0032 100 100 000 Old_age Always - 0
174 Unexpect_Power_Loss_Ct 0x0030 000 000 000 Old_age Offline - 39
177 Wear_Range_Delta 0x0000 000 000 000 Old_age Offline - 1
181 Program_Fail_Count 0x000a 100 100 000 Old_age Always - 0
182 Erase_Fail_Count 0x0032 100 100 000 Old_age Always - 0
187 Reported_Uncorrect 0x0012 100 100 000 Old_age Always - 0
189 Airflow_Temperature_Cel 0x0000 026 035 000 Old_age Offline - 26
194 Temperature_Celsius 0x0022 026 035 000 Old_age Always - 26
195 ECC_Uncorr_Error_Count 0x001c 120 120 000 Old_age Offline - 0/0
196 Reallocated_Event_Count 0x0033 100 100 003 Pre-fail Always - 0
201 Unc_Soft_Read_Err_Rate 0x001c 120 120 000 Old_age Offline - 0/0
204 Soft_ECC_Correct_Rate 0x001c 120 120 000 Old_age Offline - 0/0
230 Life_Curve_Status 0x0013 100 100 000 Pre-fail Always - 100
231 SSD_Life_Left 0x0000 096 096 011 Old_age Offline - 1
233 SandForce_Internal 0x0032 000 000 000 Old_age Always - 138
234 SandForce_Internal 0x0032 000 000 000 Old_age Always - 665
241 Lifetime_Writes_GiB 0x0032 000 000 000 Old_age Always - 665
242 Lifetime_Reads_GiB 0x0032 000 000 000 Old_age Always - 926
244 Unknown_Attribute 0x0000 097 097 010 Old_age Offline - 747
SMART Error Log not supported
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_
# 1 Extended offline Completed without error 00% 15480 -
# 2 Short offline Completed without error 00% 15088 -
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.
看起来一切都还好。