I run a RAID10 machine with 4x Samsung 480GB SSD's. The drives are of identical age.
3 of the drives have a Wear_Leveling_Count 090, but one is now as low as 003. I don't understand why one of the drives is so much worse than the other 3. Their load and usage is identical. All drives were new when they were first installed 2 years ago.
The RAW value of the failing drive is 3058.
That said, the performance is still fine. Should this drive be replaced ASAP or can I ignore it? Replacing the drive means a lot of downtime for my sites.
Raw output of smartctl can be found here: https://pastebin.com/ktdEGFqS
smartctl -a /dev/sdd
smartctl 7.0 2018-12-30 r4883 [x86_64-linux-3.10.0-1127.19.1.el7.x86_64] (local build)
Copyright (C) 2002-18, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Samsung based SSDs
Device Model: SAMSUNG MZ7GE480HMHP-00003
Serial Number: S1M8NYAF700916
LU WWN Device Id: 5 002538 800184545
Firmware Version: EXT0303Q
User Capacity: 480,103,981,056 bytes [480 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-2, ATA8-ACS T13/1699-D revision 4c
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Sat Aug 5 10:04:25 2023 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: FAILED!
Drive failure expected in less than 24 hours. SAVE ALL DATA.
See vendor-specific Attribute list for failed Attributes.
General SMART Values:
Offline data collection status: (0x00) Offline data collection activity
was never started.
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: (0x53) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
No Offline surface scan supported.
Self-test supported.
No 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: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 110) minutes.
SCT capabilities: (0x003d) SCT Status supported.
SCT Error Recovery Control supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
9 Power_On_Hours 0x0032 085 085 000 Old_age Always - 74986
12 Power_Cycle_Count 0x0032 099 099 000 Old_age Always - 16
177 Wear_Leveling_Count 0x0013 003 003 005 Pre-fail Always FAILING_NOW 3058
179 Used_Rsvd_Blk_Cnt_Tot 0x0013 100 100 010 Pre-fail Always - 0
180 Unused_Rsvd_Blk_Cnt_Tot 0x0013 100 100 010 Pre-fail Always - 8796
181 Program_Fail_Cnt_Total 0x0032 100 100 000 Old_age Always - 0
182 Erase_Fail_Count_Total 0x0032 100 100 000 Old_age Always - 0
183 Runtime_Bad_Block 0x0013 100 100 010 Pre-fail Always - 0
184 End-to-End_Error 0x0033 100 100 097 Pre-fail Always - 0
187 Uncorrectable_Error_Cnt 0x0032 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0032 067 043 000 Old_age Always - 33
195 ECC_Error_Rate 0x001a 200 200 000 Old_age Always - 0
199 CRC_Error_Count 0x003e 100 100 000 Old_age Always - 0
202 Exception_Mode_Status 0x0033 100 100 010 Pre-fail Always - 0
235 POR_Recovery_Count 0x0012 099 099 000 Old_age Always - 12
241 Total_LBAs_Written 0x0032 099 099 000 Old_age Always - 2711366975590
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% 1 -
2 Short offline Completed without error 00% 0 -
3 Extended offline Completed without error 00% 5 -
4 Short offline Completed without error 00% 0 -
5 Short offline Completed without error 00% 432 -
6 Extended offline Completed without error 00% 412 -
7 Short offline Completed without error 00% 408 -
8 Short offline Completed without error 00% 384 -
9 Short offline Completed without error 00% 360 -
#10 Short offline Completed without error 00% 336 -
#11 Short offline Completed without error 00% 312 -
#12 Short offline Completed without error 00% 288 -
#13 Short offline Completed without error 00% 264 -
#14 Extended offline Completed without error 00% 245 -
#15 Short offline Completed without error 00% 240 -
#16 Short offline Completed without error 00% 216 -
#17 Short offline Completed without error 00% 192 -
#18 Short offline Completed without error 00% 168 -
#19 Short offline Completed without error 00% 144 -
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.
