Boot device - warning about one corrupted file

TrueNAS General
1

I received a message overnight about a corrupted file on the SSD boot device.

zpool status -xv
  pool: freenas-boot
 state: ONLINE
status: One or more devices has experienced an error resulting in data
	corruption.  Applications may be affected.
action: Restore the file in question if possible.  Otherwise restore the
	entire pool from backup.
   see: https://openzfs.github.io/openzfs-docs/msg/ZFS-8000-8A
  scan: scrub repaired 0B in 00:00:31 with 1 errors on Fri Aug  9 03:45:31 2024
config:

	NAME          STATE     READ WRITE CKSUM
	freenas-boot  ONLINE       0     0     0
	  ada8p2      ONLINE       0     0     6

errors: Permanent errors have been detected in the following files:

        //boot/kernel-debug/iser.ko

The system is running TrueNAS-13.0-U6.2. The boot device is a SanDisk Plus 120GB connected via a SATA cable to the Supermicro X10SRH-cF motherboard. The syslog is also kept on the boot SSD, but nothing else uses it.

The boot SSD passes a SMART short test. I have never been able to get it to do long tests, so I simply have a short test run every day.

Digging deeper, the corrupted file seems to be related to iSCSI, which I donā€™t use.

Looking back at the daily SMART reports I receive via email, I see that the Reported_Uncorrect value did a sudden step increase from 8 to 10076 on 2024-07-28, and is now at 10092. Iā€™ll order a replacement boot SSD. Comments?

Given that the SSD is much larger than strictly needed for a boot device, I wonder if there is any benefit to setting file copies to 2 or more. Is that possible on a boot device?

smartctl -x /dev/ada8
smartctl 7.2 2021-09-14 r5236 [FreeBSD 13.1-RELEASE-p9 amd64] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     SandForce Driven SSDs
Device Model:     SanDisk SDSSDA120G
Serial Number:    162214402614
LU WWN Device Id: 5 001b44 4a4a89abb
Firmware Version: Z22000RL
User Capacity:    120,034,123,776 bytes [120 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      1.8 inches
TRIM Command:     Available
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2 T13/2015-D revision 3
SATA Version is:  SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Fri Aug  9 08:22:47 2024 CDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
AAM feature is:   Unavailable
APM feature is:   Disabled
Rd look-ahead is: Enabled
Write cache is:   Enabled
DSN feature is:   Unavailable
ATA Security is:  Disabled, frozen [SEC2]
Wt Cache Reorder: Unavailable

=== 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: 			 (0x71) SMART execute Offline immediate.
					No Auto Offline data collection support.
					Suspend Offline collection upon new
					command.
					No Offline surface scan supported.
					Self-test supported.
					Conveyance Self-test supported.
					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:        (0x01)	Error logging supported.
					General Purpose Logging supported.
Short self-test routine 
recommended polling time: 	 (   2) minutes.
Extended self-test routine
recommended polling time: 	 (  10) minutes.
Conveyance self-test routine
recommended polling time: 	 (   2) minutes.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAGS    VALUE WORST THRESH FAIL RAW_VALUE
  5 Retired_Block_Count     -O--CK   100   100   000    -    25
  9 Power_On_Hours_and_Msec -O--CK   119   100   000    -    11895h+00m+00.000s
 12 Power_Cycle_Count       -O--CK   100   100   000    -    242
166 Unknown_Attribute       -O--CK   100   100   000    -    19873
167 Unknown_Attribute       -O--CK   100   100   000    -    15
168 Unknown_Attribute       -O--CK   100   100   000    -    19926
169 Unknown_Attribute       -O--CK   100   100   000    -    42
170 Reserve_Block_Count     -O--CK   100   100   000    -    25
171 Program_Fail_Count      -O--CK   100   100   000    -    0
172 Erase_Fail_Count        -O--CK   100   100   000    -    0
173 Unknown_SandForce_Attr  -O--CK   100   100   ---    -    19822
174 Unexpect_Power_Loss_Ct  -O--CK   100   100   000    -    201
187 Reported_Uncorrect      -O--CK   100   100   000    -    10092
194 Temperature_Celsius     -O---K   060   100   000    -    40 (Min/Max 0/47)
199 SATA_CRC_Error_Count    -O--CK   100   100   000    -    0
230 Life_Curve_Status       -O--CK   100   100   000    -    663
232 Available_Reservd_Space PO--CK   100   100   004    -    91
233 SandForce_Internal      -O--CK   100   100   000    -    1667078
241 Lifetime_Writes_GiB     ----CK   253   253   000    -    51887
242 Lifetime_Reads_GiB      ----CK   253   253   000    -    4364
                            ||||||_ K auto-keep
                            |||||__ C event count
                            ||||___ R error rate
                            |||____ S speed/performance
                            ||_____ O updated online
                            |______ P prefailure warning

General Purpose Log Directory Version 1
SMART           Log Directory Version 1 [multi-sector log support]
Address    Access  R/W   Size  Description
0x00       GPL,SL  R/O      1  Log Directory
0x01       GPL,SL  R/O      1  Summary SMART error log
0x02       GPL,SL  R/O      1  Comprehensive SMART error log
0x03       GPL,SL  R/O      1  Ext. Comprehensive SMART error log
0x04       GPL,SL  R/O      8  Device Statistics log
0x06       GPL,SL  R/O      1  SMART self-test log
0x07       GPL,SL  R/O      1  Extended self-test log
0x09       GPL,SL  R/W      1  Selective self-test log
0x10       GPL,SL  R/O      1  NCQ Command Error log
0x11       GPL,SL  R/O      1  SATA Phy Event Counters log
0x30       GPL,SL  R/O      9  IDENTIFY DEVICE data log
0x80-0x9f  GPL,SL  R/W     16  Host vendor specific log
0xe0       GPL,SL  R/W      1  SCT Command/Status
0xe1       GPL,SL  R/W      1  SCT Data Transfer

SMART Extended Comprehensive Error Log Version: 1 (1 sectors)
No Errors Logged

SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%     11786         -
# 2  Short offline       Completed without error       00%     11774         -
# 3  Short offline       Completed without error       00%     11762         -
# 4  Short offline       Completed without error       00%     10468         -
# 5  Short offline       Completed without error       00%     10457         -
# 6  Short offline       Completed without error       00%     10446         -
# 7  Short offline       Completed without error       00%     10436         -
# 8  Short offline       Completed without error       00%     10424         -
# 9  Short offline       Completed without error       00%     10389         -
#10  Reserved (0x0d)     Completed without error       00%      7965         -
#11  Vendor (0x4b)       Self-test routine in progress 90%      7955         -
#12  Short offline       Unknown status (0xb)          10%      7945         -
#13  Short offline       Completed without error       00%      7877         -
#14  Short offline       Completed without error       00%      7868         -
#15  Short offline       Completed without error       00%      7857         -
#16  Short offline       Completed without error       00%      7847         -
#17  Reserved (0x0d)     Completed without error       00%      7838         -
#18  Vendor (0x4b)       Self-test routine in progress 90%      7693         -
#19  Short offline       Unknown status (0xb)          10%     63819         -

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.

SCT Commands not supported

Device Statistics (GP Log 0x04)
Page  Offset Size        Value Flags Description
0x01  =====  =               =  ===  == General Statistics (rev 2) ==
0x01  0x008  4             242  ---  Lifetime Power-On Resets
0x01  0x010  4           11895  ---  Power-on Hours
0x01  0x018  6           51887  ---  Logical Sectors Written
0x01  0x020  6      3531021314  ---  Number of Write Commands
0x01  0x028  6            4364  ---  Logical Sectors Read
0x01  0x030  6       175808871  ---  Number of Read Commands
0x02  =====  =               =  ===  == Free-Fall Statistics (empty) ==
0x03  =====  =               =  ===  == Rotating Media Statistics (empty) ==
0x04  =====  =               =  ===  == General Errors Statistics (rev 1) ==
0x04  0x008  4           10092  ---  Number of Reported Uncorrectable Errors
0x04  0x010  4             201  ---  Resets Between Cmd Acceptance and Completion
0x05  =====  =               =  ===  == Temperature Statistics (rev 1) ==
0x05  0x008  1              40  ---  Current Temperature
0x05  0x010  1              -4  ---  Average Short Term Temperature
0x05  0x018  1              58  ---  Average Long Term Temperature
0x05  0x020  1              45  ---  Highest Temperature
0x05  0x028  1               8  ---  Lowest Temperature
0x05  0x030  1              -1  ---  Highest Average Short Term Temperature
0x05  0x038  1               0  ---  Lowest Average Short Term Temperature
0x05  0x040  1              -1  ---  Highest Average Long Term Temperature
0x05  0x048  1               0  ---  Lowest Average Long Term Temperature
0x05  0x050  4               0  ---  Time in Over-Temperature
0x05  0x058  1             100  ---  Specified Maximum Operating Temperature
0x05  0x060  4               0  ---  Time in Under-Temperature
0x05  0x068  1               0  ---  Specified Minimum Operating Temperature
0x06  =====  =               =  ===  == Transport Statistics (rev 1) ==
0x06  0x008  4            1442  ---  Number of Hardware Resets
0x06  0x018  4               0  ---  Number of Interface CRC Errors
0x07  =====  =               =  ===  == Solid State Device Statistics (rev 1) ==
0x07  0x008  1             148  ---  Percentage Used Endurance Indicator
                                |||_ C monitored condition met
                                ||__ D supports DSN
                                |___ N normalized value

Pending Defects log (GP Log 0x0c) not supported

SATA Phy Event Counters (GP Log 0x11)
ID      Size     Value  Description
0x0001  2            0  Command failed due to ICRC error
0x0002  2            0  R_ERR response for data FIS
0x0003  2            0  R_ERR response for device-to-host data FIS
0x0004  2            0  R_ERR response for host-to-device data FIS
0x0005  2            0  R_ERR response for non-data FIS
0x0006  2            0  R_ERR response for device-to-host non-data FIS
0x0007  2            0  R_ERR response for host-to-device non-data FIS
0x0008  2            0  Device-to-host non-data FIS retries
0x0009  2            0  Transition from drive PhyRdy to drive PhyNRdy
0x000a  2            5  Device-to-host register FISes sent due to a COMRESET
0x000b  2            0  CRC errors within host-to-device FIS
0x000d  2            0  Non-CRC errors within host-to-device FIS
0x000f  2            0  R_ERR response for host-to-device data FIS, CRC
0x0010  2            0  R_ERR response for host-to-device data FIS, non-CRC
0x0012  2            0  R_ERR response for host-to-device non-data FIS, CRC
0x0013  2            0  R_ERR response for host-to-device non-data FIS, non-CRC
2

Studying the SMART data, I see that this 120GB drive has been subjected to about 55TB of writes. It is likely essentially worn out. Iā€™ll replace it with something with a higher endurance.

3

The error count you have is for unrecoverable ECC read errors. This is not very good as you likely know. Your drive has 91% life remaining, from a used block perspective. Please run a SMART Long self-test, it has been a while since you ran it last, report if it passed and if not, post the results. Your SSD does have a firmware update to version Z32080RL, this could correct the issue. You should look into that. And keep track of your errors, unfortunately watching to see if they go up.

The simple thing to do is try the firmware update and if that fails, replace the SSD.

1 Like
4

I have never been able to get this drive to report a SMART long test. I command the test, I can then see the test is running by observing Self-test execution status, but it never shows up in the SMART results.

smartctl -x /dev/ada8 | grep -A 1 "Self-test execution status"
Self-test execution status:      ( 241)	Self-test routine in progress...
					10% of test remaining.
					
smartctl -x /dev/ada8 | grep -A 2 "Self-test execution status"
Self-test execution status:      (   0)	The previous self-test routine completed
					without error or no self-test has ever 
					been run.

SMART Extended Self-test Log Version: 1 (1 sectors)
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%     11786         -
# 2  Short offline       Completed without error       00%     11774         -
# 3  Short offline       Completed without error       00%     11762         -
# 4  Short offline       Completed without error       00%     10468         -
# 5  Short offline       Completed without error       00%     10457         -
# 6  Short offline       Completed without error       00%     10446         -
# 7  Short offline       Completed without error       00%     10436         -
# 8  Short offline       Completed without error       00%     10424         -
# 9  Short offline       Completed without error       00%     10389         -
5

And how about now? Itā€™s been 2 hours since you posted those results. The test ā€œshouldā€ take 10 minutes however if it has failures to process, of course it can take longer.

6

There is still no sign of a long test in the list of SMART tests.

I have tried do a long test many, many times over the life of this drive, and the story is always the same. You can see hints of the progressing test by watching ā€˜Self-test execution statusā€™, but the test result never shows up in the list of run tests. I surmise that this is due to a firmware bug in the drive.

7

I replaced the SanDisk boot SSD today with a new Kingston SEDC600M480G. The replacement went relatively smoothly, but it would have been even easier if I had a backup copy of everything in /root/. Once I realized that I was missing all my scripts, etc, I had to shutdown, put the original SSD back, copy everything to the main pool, then put the new SSD back in place again.

I now have an hourly rsync job to copy /root/ to my main pool

8

This is the primary reason why I use mirrored boot drives.

Btw, if is possible to mount the root directory from another boot disk while booted into a different one :slight_smile:

But itā€™s also a bit tricky.

2 Likes
9

That is odd that it will not complete a SMART Long test, maybe that is the error :wink:

Okay, I think it i likely a firmware issue. Good thing you just replaced the drive, especially since they are so inexpensive these days.

I put my scripts in a dataset. I never store anything in root, no need. Of course Iā€™m not a power user either.

I never thought of it from that perspective. Pretty good idea, but I dislike the argument for using it for automatic failover. Not unless you have a true RAID card installed for the boot drives. I have done that before but the RAID card was sucking the power and generating way too much heat. I have no idea why a RAID card needs to get that hot even when there is virtually no activity. That is another topic. Hum, I wonder if I could make something like that with my NVMe drives. Worth looking in to, even if I canā€™t I will at least get some good reading in.

10

For what its worth, I think there have been noted issues with those SanDisk 120GB SSDs when used in a single disk boot pool. About a year ago I had one that had been operating fine for about 5 years and suddenly started throwing scrub errors that were unrecoverable. Ultimately I replaced that drive with a Samsung SSD after reading about others with similar issues on these forums. Not sure if the below is relevant or relatedā€¦
https://www.truenas.com/community/threads/freenas-installer-sandisk-ssd-checksum-errors.64049/

1 Like