I have two Kingston A400 120GB SSD as cache in a Synology NAS, which don't seem to support automatic offline data collection.
# smartctl -d sat -c /dev/sdc | grep -i "Auto Offline data collection"
Auto Offline Data Collection: Disabled.
No Auto Offline data collection support.
# smartctl -d sat -o on /dev/sdc
SMART Automatic Timers not supported
SMART Enable Automatic Offline failed: scsi error aborted command
Yet when I check the attributes marked as "Offline", the RAW_VALUE one of them keeps changing (specifically 246 Total_Erase_Count), even if I dont run the manual offline data collection or self-tests in between. I checked if smartd was running just in case, but it isn't. Same thing happens with the other identical SSD.
Questions:
- What exactly does the offline data collection update? Does it just update the VALUE/WORST/THRESH columns in the attribute table?
- Do short or long self-tests update the SMART attribute data?
Output of smartctl -a:
=== START OF INFORMATION SECTION ===
Model Family: Phison Driven SSDs
Device Model: KINGSTON SA400S37120G
Serial Number: [...]
LU WWN Device Id: [...]
Firmware Version: 03070009
User Capacity: 120,034,123,776 bytes [120 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-3 T13/2161-D revision 4
SATA Version is: SATA 3.2, 6.0 Gb/s (current: 1.5 Gb/s)
Local Time is: Fri Apr 12 01:55:30 2019 -03
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: (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: (0x35) SMART execute Offline immediate.
No Auto Offline data collection support.
Abort Offline collection upon new
command.
No Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
No Selective Self-test supported.
SMART capabilities: (0x0002) Does not save SMART data before
entering power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x00) Error logging NOT supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 1) minutes.
Conveyance self-test routine
recommended polling time: ( 1) minutes.
SMART Attributes Data Structure revision number: 5
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x0032 100 100 000 Old_age Always - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 710
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 5
148 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
149 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
167 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 0
168 SATA_Phy_Error_Count 0x0012 100 100 000 Old_age Always - 0
169 Unknown_Attribute 0x0000 100 100 000 Old_age Offline - 65
170 Bad_Blk_Ct_Erl/Lat 0x0000 100 100 010 Old_age Offline - 0/78
172 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0
173 MaxAvgErase_Ct 0x0000 100 100 000 Old_age Offline - 0
181 Program_Fail_Cnt_Total 0x0032 100 100 000 Old_age Always - 0
182 Erase_Fail_Count_Total 0x0000 100 100 000 Old_age Offline - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
192 Unsafe_Shutdown_Count 0x0012 100 100 000 Old_age Always - 1
194 Temperature_Celsius 0x0022 024 025 000 Old_age Always - 24 (Min/Max 24/25)
196 Not_In_Use 0x0032 100 100 000 Old_age Always - 0
199 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0
218 CRC_Error_Count 0x0032 100 100 000 Old_age Always - 4
231 SSD_Life_Left 0x0000 100 100 000 Old_age Offline - 0
233 Flash_Writes_GiB 0x0032 100 100 000 Old_age Always - 396
241 Lifetime_Writes_GiB 0x0032 100 100 000 Old_age Always - 304
242 Lifetime_Reads_GiB 0x0032 100 100 000 Old_age Always - 228
244 Average_Erase_Count 0x0000 100 100 000 Old_age Offline - 2
245 Max_Erase_Count 0x0000 100 100 000 Old_age Offline - 10
246 Total_Erase_Count 0x0000 100 100 000 Old_age Offline - 3827
SMART Error Log not supported
SMART Self-test Log not supported
Selective Self-tests/Logging not supported
