Spurious unreadable (pending) sector warnings

ianhailey

Cadet
Joined
Feb 24, 2020
Messages
6
Hi,

I have two new 2TB MX500 SSDs in my TrueNas system and now twice received emails warning from one of them:

"* Device: /dev/ada1, 1 Currently unreadable (pending) sectors."

Oct 28 02:21:28 truenas 1 2020-10-28T02:21:28.927182+00:00 truenas.local smartd 1632 - - Device: /dev/ada1, 1 Currently unreadable (pending) sectors
Oct 30 17:21:28 truenas 1 2020-10-30T17:21:28.604987+00:00 truenas.local smartd 1632 - - Device: /dev/ada1, 1 Currently unreadable (pending) sectors

The odd thing is that the Current_Pending_Sector count is 0 if I check manually with smartctl:

197 Current_Pending_Sector 0x0032 100 100 000 Old_age Always - 0

Does anyone have an idea why this might be being mis-reported?

Thanks.

P.S. I will upgrade to the 12.2-RELEASE soon but don't expect that it would impact this issue.

root@truenas[~]# smartctl -a /dev/ada1
smartctl 7.1 2019-12-30 r5022 [FreeBSD 12.2-PRERELEASE amd64] (local build)
Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: Crucial/Micron BX/MX1/2/3/500, M5/600, 1100 SSDs
Device Model: CT2000MX500SSD1
Serial Number: 2029202920295D
LU WWN Device Id: 5 00a075 1e2b83b5d
Firmware Version: M3CR032
User Capacity: 2,000,398,934,016 bytes [2.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: Solid State Device
Form Factor: 2.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-3 T13/2161-D revision 5
SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Fri Oct 30 19:20:35 2020 GMT
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: ( 0) 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: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 30) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x0031) SCT Status supported.
SCT Feature Control supported.
SCT Data Table supported.

SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 100 100 000 Pre-fail Always - 0
5 Reallocate_NAND_Blk_Cnt 0x0032 100 100 010 Old_age Always - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 80
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 8
171 Program_Fail_Count 0x0032 100 100 000 Old_age Always - 0
172 Erase_Fail_Count 0x0032 100 100 000 Old_age Always - 0
173 Ave_Block-Erase_Count 0x0032 100 100 000 Old_age Always - 1
174 Unexpect_Power_Loss_Ct 0x0032 100 100 000 Old_age Always - 0
180 Unused_Reserve_NAND_Blk 0x0033 000 000 000 Pre-fail Always - 54
183 SATA_Interfac_Downshift 0x0032 100 100 000 Old_age Always - 0
184 Error_Correction_Count 0x0032 100 100 000 Old_age Always - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
194 Temperature_Celsius 0x0022 076 064 000 Old_age Always - 24 (Min/Max 0/36)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0032 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0
202 Percent_Lifetime_Remain 0x0030 100 100 001 Old_age Offline - 0
206 Write_Error_Rate 0x000e 100 100 000 Old_age Always - 0
210 Success_RAIN_Recov_Cnt 0x0032 100 100 000 Old_age Always - 0
246 Total_LBAs_Written 0x0032 100 100 000 Old_age Always - 1046292791
247 Host_Program_Page_Count 0x0032 100 100 000 Old_age Always - 8700670
248 FTL_Program_Page_Count 0x0032 100 100 000 Old_age Always - 15530380

SMART Error Log Version: 1
Warning: ATA error count 0 inconsistent with error log pointer 1

ATA Error Count: 0
CR = Command Register [HEX]
FR = Features Register [HEX]
SC = Sector Count Register [HEX]
SN = Sector Number Register [HEX]
CL = Cylinder Low Register [HEX]
CH = Cylinder High Register [HEX]
DH = Device/Head Register [HEX]
DC = Device Command Register [HEX]
ER = Error register [HEX]
ST = Status register [HEX]
Powered_Up_Time is measured from power on, and printed as
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,
SS=sec, and sss=millisec. It "wraps" after 49.710 days.

Error 0 occurred at disk power-on lifetime: 0 hours (0 days + 0 hours)
When the command that caused the error occurred, the device was in an unknown state.

After command completion occurred, registers were:
ER ST SC SN CL CH DH
-- -- -- -- -- -- --
00 ec 00 00 00 00 00

Commands leading to the command that caused the error were:
CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name
-- -- -- -- -- -- -- -- ---------------- --------------------
ec 00 00 00 00 00 00 00 00:00:00.000 IDENTIFY DEVICE
ec 00 00 00 00 00 00 00 00:00:00.000 IDENTIFY DEVICE
ec 00 00 00 00 00 00 00 00:00:00.000 IDENTIFY DEVICE
ec 00 00 00 00 00 00 00 00:00:00.000 IDENTIFY DEVICE
c8 00 00 00 00 00 00 00 00:00:00.000 READ DMA

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% 80 -

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.
 

InQuize

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Joined
May 9, 2015
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