SanDisk SDSSDP064G: Bogus Power_On_Hours raw value

[hreindl]

that device seems to be very special

Power_On_Hours 80
Filesystem created: Mon Jun 15 19:21:03 2015

smartmontools-6.2-7.el7.x86_64

i doubt the 80 hours because it's acting as router since it was installed and is 365/24 on :-)

Status /dev/sda:

smartctl 6.2 2013-07-26 r3841 [x86_64-linux-3.10.0-514.16.1.el7.x86_64] (local build)
Copyright (C) 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     SanDisk based SSDs
Device Model:     SanDisk SDSSDP064G
Serial Number:    151799401378
LU WWN Device Id: 5 001b44 e638807a2
Firmware Version: 3.2.0
User Capacity:    63.023.063.040 bytes [63,0 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 T13/2015-D revision 3
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Fri Apr 21 13:06:01 2017 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: PASSED

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   0x0002   100   100   000    Old_age   Always       -       0
  9 Power_On_Hours          0x0002   100   100   000    Old_age   Always       -       80
 12 Power_Cycle_Count       0x0002   100   100   000    Old_age   Always       -       32
165 Total_Write/Erase_Count 0x0002   100   100   000    Old_age   Always       -       6104
171 Program_Fail_Count      0x0002   100   100   000    Old_age   Always       -       0
172 Erase_Fail_Count        0x0002   100   100   000    Old_age   Always       -       0
173 Avg_Write/Erase_Count   0x0002   100   100   000    Old_age   Always       -       1
174 Unexpect_Power_Loss_Ct  0x0002   100   100   000    Old_age   Always       -       20
187 Reported_Uncorrect      0x0002   100   100   000    Old_age   Always       -       0
194 Temperature_Celsius     0x0022   079   021   000    Old_age   Always       -       21 (Min/Max 12/52)
230 Perc_Write/Erase_Count  0x0002   100   100   000    Old_age   Always       -       3
232 Perc_Avail_Resrvd_Space 0x0003   100   100   005    Pre-fail  Always       -       0
234 Perc_Write/Erase_Ct_BC  0x0002   100   100   000    Old_age   Always       -       5
241 Total_LBAs_Written      0x0002   100   100   000    Old_age   Always       -       224260420
242 Total_LBAs_Read         0x0002   100   100   000    Old_age   Always       -       56361752

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         -
# 2  Short offline       Completed without error       00%        80         -
# 3  Short offline       Completed without error       00%        80         -
# 4  Short offline       Completed without error       00%        80         -
# 5  Short offline       Completed without error       00%        80         -
# 6  Short offline       Completed without error       00%        80         -
# 7  Extended offline    Completed without error       00%        80         -
# 8  Short offline       Completed without error       00%        80         -
# 9  Short offline       Completed without error       00%        79         -
#10  Short offline       Completed without error       00%        79         -
#11  Short offline       Completed without error       00%        79         -
#12  Short offline       Completed without error       00%        79         -
#13  Short offline       Completed without error       00%        79         -
#14  Short offline       Completed without error       00%        79         -
#15  Extended offline    Completed without error       00%        79         -
#16  Short offline       Completed without error       00%        78         -
#17  Short offline       Completed without error       00%        78         -
#18  Short offline       Completed without error       00%        78         -
#19  Short offline       Completed without error       00%        78         -
#20  Short offline       Completed without error       00%        78         -
#21  Short offline       Completed without error       00%        78         -

[hreindl]

smartctl-SanDisk-SDSSDP064G.txt

[Christian Franke]

If the device firmware reports a bogus Power_On_Hours raw value, there is not much we could do.

Did this value exceed the current value in the past?
Does this value increase after each hour?
Is this device in some low power (e.g. STANDBY) mode most of the time (see smartctl -n option on man page) ?

ATA Devices Statistics (part of ATA standard) occasionally provides more reliable values than SMART Attributes (not part ATA standard). This device supports Device Statistics, but unfortunately the General Statistics page with Power-on Hours counter is missing.

For further diagnostics, please provide the output of the following command as an attachment:

smartctl -r ioctl,2 -i -A /dev/sda

[hreindl]

no it does not increase after an hour, see the "SMART Self-test log", it seems to be weeks what the device reports

[hreindl]

smartctl -r ioctl,2 -i -A

[Alex Samorukov]

disk firmware issue