Had a scare. Drive temperatures and fan speed dissapeared. Reboot solved it

@SBrown , you may wish to pass this onto the team responsible for the NAS’s OS.

The best thing to describe this is that the Dashboard UI status changed from Healthy to Caution and when I have a look the status of the fan shows N/A.

Is this a small issue or can this cause loss of data?

2021-04-23T23:54:07.516695+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 55.
2021-04-23T23:54:37.839691+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 56.
2021-04-24T00:17:22.724645+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 60.
2021-04-24T01:16:57.185896+01:00  6 DL4100 wdtms: hwlib_temperature source 'system' is now at 47.
2021-04-24T01:40:25.578184+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 61.
2021-04-24T02:04:21.104614+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 56.
2021-04-24T02:04:31.226688+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 55.
2021-04-24T02:12:58.023901+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 51.
2021-04-24T02:20:23.571751+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 56.
2021-04-24T02:25:26.785646+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 60.
2021-04-24T02:32:21.521008+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 61.
2021-04-24T13:42:50.075080+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 56.
2021-04-24T13:43:30.540424+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 55.
2021-04-24T14:49:45.415914+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 51.
2021-04-24T14:52:27.607238+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 50.
2021-04-24T14:54:29.355483+01:00  6 DL4100 wdtms: hwlib_temperature source 'system' is now at 52.
2021-04-24T15:15:55.827005+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 55.
2021-04-24T15:16:56.490995+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 56.
2021-04-24T17:34:35.898093+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 60.
2021-04-24T18:34:32.332377+01:00  6 DL4100 wdhws: starting wdhw service with config_file=/etc/wd/sprite-wdhw.xml
2021-04-24T18:34:32.388249+01:00  6 DL4100 wdlcds: starting lcd service with config_file=/etc/wd/sprite-lcd.xml
2021-04-24T18:34:32.517514+01:00  6 DL4100 wdtms: Loading configuration from '/etc/wd/BNEZ_SO_DIMM-thermal.xml'.
2021-04-24T18:34:32.518313+01:00  6 DL4100 wdtms: Script running at 1 second intervals.
2021-04-24T18:34:32.518341+01:00  6 DL4100 wdtms: Script running with maximum interval cycle value of 600
2021-04-24T18:34:32.533333+01:00  4 DL4100 wdtms: hwlib_temperature will log when temperatures change by 5 degrees.
2021-04-24T18:34:32.535065+01:00  6 DL4100 wdtms: hwlib_temperature: autodetect for source 'system' found 1 elements.
2021-04-24T18:34:32.535492+01:00  4 DL4100 wdtms: hwlib_temperature will log when temperatures change by 5 degrees.
2021-04-24T18:34:32.536109+01:00  6 DL4100 wdtms: hwlib_temperature: source 'memory' has been explicitly configured for 1 elements.
2021-04-24T18:34:32.536327+01:00  4 DL4100 wdtms: hwlib_temperature will log when temperatures change by 5 degrees.
2021-04-24T18:34:32.569799+01:00  6 DL4100 wdtms: hwlib_temperature: autodetect for source 'dts' found 2 elements.
2021-04-24T18:34:32.569958+01:00  4 DL4100 wdtms: hwlib_temperature will log when temperatures change by 5 degrees.
2021-04-24T18:34:32.591619+01:00  6 DL4100 wdtms: hwlib_temperature: autodetect for source 'cpu' found 2 elements.
2021-04-24T18:34:32.592385+01:00  6 DL4100 wdtms: hwlib_fan_controller: autodetect for source 'system_fan' found 1 elements.
2021-04-24T18:34:32.749912+01:00  6 DL4100 wdtms: hwlib_fan_controller set fan system_fan:0 to 30.
2021-04-24T18:34:32.751129+01:00  4 DL4100 wdtms: drive_temperature will log when temperatures change by 5 degrees.
2021-04-24T18:34:32.773407+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 67.
2021-04-24T18:34:32.786249+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 67.
2021-04-24T18:34:32.899522+01:00  6 DL4100 wdtms: hwlib_temperature source 'system' is now at 49.
2021-04-24T18:34:32.952239+01:00  6 DL4100 wdtms: drive_temperature source  index 0 is now at 34.
2021-04-24T18:34:33.006158+01:00  6 DL4100 wdtms: drive_temperature source  index 1 is now at 33.
2021-04-24T18:34:33.064997+01:00  6 DL4100 wdtms: drive_temperature source  index 2 is now at 33.
2021-04-24T18:34:33.115210+01:00  6 DL4100 wdtms: drive_temperature source  index 3 is now at 33.
2021-04-24T18:34:36.058620+01:00  6 DL4100 wdtms: hwlib_temperature source 'system' is now at 44.
2021-04-24T18:35:44.209784+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 62.
2021-04-24T18:35:44.248061+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 62.
2021-04-24T18:37:56.380710+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 57.
2021-04-24T18:37:56.413558+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 57.
2021-04-24T18:42:40.472401+01:00  6 DL4100 wdtms: hwlib_temperature source 'system' is now at 49.
2021-04-24T18:46:33.720812+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 52.
2021-04-24T19:01:25.294495+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 52.
2021-04-24T19:05:12.190356+01:00  3 DL4100 wdlcds: ERROR: Missing mandatory option config=<Absolute path to platform configuration file>
2021-04-24T19:05:21.466974+01:00  3 DL4100 wdlcds: ERROR: Missing mandatory option config=<Absolute path to platform configuration file>
2021-04-24T19:06:59.128236+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 57.
2021-04-24T19:07:19.347338+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 57.
2021-04-24T19:33:26.650359+01:00  6 DL4100 wdhws: starting wdhw service with config_file=/etc/wd/sprite-wdhw.xml
2021-04-24T19:33:26.715271+01:00  6 DL4100 wdlcds: starting lcd service with config_file=/etc/wd/sprite-lcd.xml
2021-04-24T19:33:26.843852+01:00  6 DL4100 wdtms: Loading configuration from '/etc/wd/BNEZ_SO_DIMM-thermal.xml'.
2021-04-24T19:33:26.844839+01:00  6 DL4100 wdtms: Script running at 1 second intervals.
2021-04-24T19:33:26.845020+01:00  6 DL4100 wdtms: Script running with maximum interval cycle value of 600
2021-04-24T19:33:26.853150+01:00  4 DL4100 wdtms: hwlib_temperature will log when temperatures change by 5 degrees.
2021-04-24T19:33:26.853420+01:00  6 DL4100 wdtms: hwlib_temperature: autodetect for source 'system' found 1 elements.
2021-04-24T19:33:26.853796+01:00  4 DL4100 wdtms: hwlib_temperature will log when temperatures change by 5 degrees.
2021-04-24T19:33:26.854396+01:00  6 DL4100 wdtms: hwlib_temperature: source 'memory' has been explicitly configured for 1 elements.
2021-04-24T19:33:26.854672+01:00  4 DL4100 wdtms: hwlib_temperature will log when temperatures change by 5 degrees.
2021-04-24T19:33:26.888451+01:00  6 DL4100 wdtms: hwlib_temperature: autodetect for source 'dts' found 2 elements.
2021-04-24T19:33:26.888613+01:00  4 DL4100 wdtms: hwlib_temperature will log when temperatures change by 5 degrees.
2021-04-24T19:33:26.911594+01:00  6 DL4100 wdtms: hwlib_temperature: autodetect for source 'cpu' found 2 elements.
2021-04-24T19:33:26.912390+01:00  6 DL4100 wdtms: hwlib_fan_controller: autodetect for source 'system_fan' found 1 elements.
2021-04-24T19:33:27.050187+01:00  6 DL4100 wdtms: hwlib_fan_controller set fan system_fan:0 to 30.
2021-04-24T19:33:27.051278+01:00  4 DL4100 wdtms: drive_temperature will log when temperatures change by 5 degrees.
2021-04-24T19:33:27.080878+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 65.
2021-04-24T19:33:27.095046+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 65.
2021-04-24T19:33:27.250299+01:00  6 DL4100 wdtms: hwlib_temperature source 'system' is now at 48.
2021-04-24T19:33:27.303177+01:00  6 DL4100 wdtms: drive_temperature source  index 0 is now at 34.
2021-04-24T19:33:27.353709+01:00  6 DL4100 wdtms: drive_temperature source  index 1 is now at 33.
2021-04-24T19:33:27.410579+01:00  6 DL4100 wdtms: drive_temperature source  index 2 is now at 33.
2021-04-24T19:33:27.457349+01:00  6 DL4100 wdtms: drive_temperature source  index 3 is now at 33.
2021-04-24T19:34:38.433876+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 60.
2021-04-24T19:34:48.576597+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 60.
2021-04-24T19:37:20.736314+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 55.
2021-04-24T19:37:30.868096+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 55.
2021-04-24T20:06:12.919285+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 60.
2021-04-24T20:06:23.015396+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 60.
2021-04-25T02:03:21.153618+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 55.
2021-04-25T02:03:31.316097+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 55.
2021-04-25T02:22:05.053274+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 0 is now at 60.
2021-04-25T02:22:25.229804+01:00  6 DL4100 wdtms: hwlib_temperature source 'dts' index 1 is now at 60.
2021-04-25T19:05:48.351517+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:49.353736+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:50.354964+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:50.393558+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:05:50.393590+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:05:52.358290+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:53.360461+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:55.690238+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:55.691451+01:00  3 DL4100 wdtms: Failed to increment fan system_fan:0 speed, status 2.
2021-04-25T19:05:55.701535+01:00  3 DL4100 wdtms: ERROR: Step 'nochange_sys_fan3' failed to increment fan 0 on source 'system_fan' by 0.
2021-04-25T19:05:56.696192+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:57.696577+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:58.697011+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:59.697430+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:05:59.697557+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:00.432026+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:06:00.432049+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:06:00.697979+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:01.698804+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:02.700153+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:03.700608+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:04.701032+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:05.701636+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:05.701765+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:06.702579+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:07.702990+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:08.703447+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:09.358963+01:00  3 DL4100 wdtms: hwlib_temperature for source 'system' failed to get temperature 0, status 2.
2021-04-25T19:06:09.704218+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:09.704333+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:10.433186+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:06:10.433210+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:06:10.705176+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:11.708018+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:12.708452+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:13.708869+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:13.709008+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:14.360500+01:00  3 DL4100 wdtms: hwlib_temperature for source 'system' failed to get temperature 0, status 2.
2021-04-25T19:06:14.360566+01:00  4 DL4100 wdtms: WARNING: Step 'check_pmc_extreme' found no valid temperatures from source 'system'.
2021-04-25T19:06:14.586477+01:00  3 DL4100 wdtms: Failed to get fan RPM system_fan:0 status 2.
2021-04-25T19:06:14.710183+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:15.711273+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:16.711601+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:17.711988+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:18.712724+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:18.712849+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:19.361651+01:00  3 DL4100 wdtms: hwlib_temperature for source 'system' failed to get temperature 0, status 2.
2021-04-25T19:06:19.361706+01:00  4 DL4100 wdtms: WARNING: Step 'check_pmc_danger' found no valid temperatures from source 'system'.
2021-04-25T19:06:19.713274+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:20.434369+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:06:20.434391+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:06:20.714426+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:21.715372+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:22.716010+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:23.716622+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:24.362787+01:00  3 DL4100 wdtms: hwlib_temperature for source 'system' failed to get temperature 0, status 2.
2021-04-25T19:06:24.362843+01:00  4 DL4100 wdtms: WARNING: Step 'check_pmc_hot' found no valid temperatures from source 'system'.
2021-04-25T19:06:24.717332+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:25.717761+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:26.718169+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:27.718581+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:27.718706+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:28.719324+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:29.363958+01:00  3 DL4100 wdtms: hwlib_temperature for source 'system' failed to get temperature 0, status 2.
2021-04-25T19:06:29.364013+01:00  4 DL4100 wdtms: WARNING: Step 'check_pmc_warm' found no valid temperatures from source 'system'.
2021-04-25T19:06:29.720448+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:30.435554+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:06:30.435574+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:06:30.720876+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:31.721284+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:31.721410+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:32.721794+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:33.722983+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:34.365085+01:00  3 DL4100 wdtms: hwlib_temperature for source 'system' failed to get temperature 0, status 2.
2021-04-25T19:06:34.365141+01:00  4 DL4100 wdtms: WARNING: Step 'check_pmc_content' found no valid temperatures from source 'system'.
2021-04-25T19:06:34.724302+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:35.724939+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:36.725363+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:37.726044+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:38.726466+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:39.366204+01:00  3 DL4100 wdtms: hwlib_temperature for source 'system' failed to get temperature 0, status 2.
2021-04-25T19:06:39.366262+01:00  4 DL4100 wdtms: WARNING: Step 'check_pmc_under' found no valid temperatures from source 'system'.
2021-04-25T19:06:39.726883+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:40.436679+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:06:40.436700+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:06:40.727302+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:40.727425+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:41.729434+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:42.730575+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:43.731232+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:44.367398+01:00  3 DL4100 wdtms: hwlib_temperature for source 'system' failed to get temperature 0, status 2.
2021-04-25T19:06:44.367453+01:00  4 DL4100 wdtms: WARNING: Step 'check_pmc_cool' found no valid temperatures from source 'system'.
2021-04-25T19:06:44.731981+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:45.732891+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:46.734190+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:47.734673+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:48.735320+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:49.369574+01:00  3 DL4100 wdtms: Failed to increment fan system_fan:0 speed, status 2.
2021-04-25T19:06:49.369631+01:00  3 DL4100 wdtms: ERROR: Step 'nochange_sys_fan3' failed to increment fan 0 on source 'system_fan' by 0.
2021-04-25T19:06:49.735706+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:49.735836+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:50.437845+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:06:50.437867+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:06:50.738041+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:51.738458+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:52.738843+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:53.739274+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:53.739403+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:06:54.740387+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:55.740864+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:56.741514+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:57.742356+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:58.743504+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:06:59.744371+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:00.439024+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:07:00.439046+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:07:00.744925+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:01.745548+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:02.746275+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:03.746659+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:03.746787+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:07:04.408403+01:00  3 DL4100 wdtms: Failed to increment fan system_fan:0 speed, status 2.
2021-04-25T19:07:04.408461+01:00  3 DL4100 wdtms: ERROR: Step 'nochange_sys_fan3' failed to increment fan 0 on source 'system_fan' by 0.
2021-04-25T19:07:04.747483+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:05.747882+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:06.748330+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:07.748741+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:07.748865+01:00  3 DL4100 wdhws: ERROR: PMC communication exhausted retry(s)
2021-04-25T19:07:08.749414+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:09.750733+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:09.752044+01:00  3 DL4100 power_monitor: driver_polling_loop::run failed to query power state: failed to get power supply status 1
2021-04-25T19:07:09.752066+01:00  3 DL4100 power_monitor: driver_polling_loop::run() skip updating failure
2021-04-25T19:07:10.752582+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:11.753272+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish
2021-04-25T19:07:12.753685+01:00  3 DL4100 wdhws: ERROR: get_response() write failed didn't finish

The only thing that can cause data loss is a failure of the file system or the drives.
Failing Fan, PCBA, SATA connections, memory module, ethernet port or enclosure would not cause data loss.

If a process cannot get the status of a device, then we retry and raise a caution warning. If the status is returned as FAILED, then we put the FAILED status.

Thanks for reply. So the question remains (I’ve downloaded the logs of the event if they are required.) what caused the malfunction? Reboot fixed it, but strangely when the reboot was requested there was a longer delay, the WebUI started to redraw, but as the toolbar was drawn on the browser, the NAS performed the actual reboot. (The fan spun-up to full speed.)

So far everything seems ok.