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Newbie
Posts: 1
Registered: ‎11-18-2016

Interpreting SMART values, where is the Documentation / Datasheet?

[ Edited ]

Hello, SanDisk

 

As a professional Workstation user, I would expect the manufacturer of my storage device (SanDisk Extreme Pro®) to provide me with Documentation that allows me to actually utilize the SMART information to gauge the health of the device.

 

I got two of the SDSSDXPS480G models and even though there hasn't been any I/O-errors, I'm still concerned by the differing SMART-attributes on these devices:

 

 

smartctl 6.4 2014-10-07 r4002 [x86_64-linux-4.7.0-0.bpo.1-amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Marvell based SanDisk SSDs
Device Model:     SanDisk SDSSDXPS480G
Serial Number:    #####
LU WWN Device Id: #####
Firmware Version: X21000RL
User Capacity:    480,103,981,056 bytes [480 GB]
Sector Size:      512 bytes logical/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-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 Nov 18 21:43:23 2016 EET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

SMART Attributes Data Structure revision number: 4
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  5 Reallocated_Sector_Ct   0x0032   100   100   ---    Old_age   Always       -       12
  9 Power_On_Hours          0x0032   253   100   ---    Old_age   Always       -       5045
 12 Power_Cycle_Count       0x0032   100   100   ---    Old_age   Always       -       81
166 Min_W/E_Cycle           0x0032   100   100   ---    Old_age   Always       -       6
167 Min_Bad_Block/Die       0x0032   100   100   ---    Old_age   Always       -       76
168 Maximum_Erase_Cycle     0x0032   100   100   ---    Old_age   Always       -       223
169 Total_Bad_Block         0x0032   100   100   ---    Old_age   Always       -       1620
171 Program_Fail_Count      0x0032   100   100   ---    Old_age   Always       -       3
172 Erase_Fail_Count        0x0032   100   100   ---    Old_age   Always       -       0
173 Avg_Write/Erase_Count   0x0032   100   100   ---    Old_age   Always       -       71
174 Unexpect_Power_Loss_Ct  0x0032   100   100   ---    Old_age   Always       -       66
184 End-to-End_Error        0x0032   100   100   ---    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   ---    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   100   ---    Old_age   Always       -       0
194 Temperature_Celsius     0x0022   067   048   ---    Old_age   Always       -       33 (Min/Max 24/48)
199 SATA_CRC_Error          0x0032   100   100   ---    Old_age   Always       -       0
212 SATA_PHY_Error          0x0032   100   100   ---    Old_age   Always       -       0
230 Perc_Write/Erase_Count  0x0032   100   100   ---    Old_age   Always       -       548
232 Perc_Avail_Resrvd_Space 0x0033   100   100   004    Pre-fail  Always       -       99
233 Total_NAND_Writes_GiB   0x0032   100   100   ---    Old_age   Always       -       37290
241 Total_Writes_GiB        0x0030   253   253   ---    Old_age   Offline      -       4253
242 Total_Reads_GiB         0x0030   253   253   ---    Old_age   Offline      -       13265
244 Thermal_Throttle        0x0032   000   100   ---    Old_age   Always       -       0


=== START OF INFORMATION SECTION ===
Model Family:     Marvell based SanDisk SSDs
Device Model:     SanDisk SDSSDXPS480G
Serial Number:    #####
LU WWN Device Id: #####
Firmware Version: X21000RL
User Capacity:    480,103,981,056 bytes [480 GB]
Sector Size:      512 bytes logical/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-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 Nov 18 21:43:25 2016 EET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

SMART Attributes Data Structure revision number: 4
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  5 Reallocated_Sector_Ct   0x0032   100   100   ---    Old_age   Always       -       0
  9 Power_On_Hours          0x0032   253   100   ---    Old_age   Always       -       4947
 12 Power_Cycle_Count       0x0032   100   100   ---    Old_age   Always       -       81
166 Min_W/E_Cycle           0x0032   100   100   ---    Old_age   Always       -       6
167 Min_Bad_Block/Die       0x0032   100   100   ---    Old_age   Always       -       87
168 Maximum_Erase_Cycle     0x0032   100   100   ---    Old_age   Always       -       168
169 Total_Bad_Block         0x0032   100   100   ---    Old_age   Always       -       1680
171 Program_Fail_Count      0x0032   100   100   ---    Old_age   Always       -       0
172 Erase_Fail_Count        0x0032   100   100   ---    Old_age   Always       -       0
173 Avg_Write/Erase_Count   0x0032   100   100   ---    Old_age   Always       -       60
174 Unexpect_Power_Loss_Ct  0x0032   100   100   ---    Old_age   Always       -       67
184 End-to-End_Error        0x0032   100   100   ---    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   ---    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   100   ---    Old_age   Always       -       0
194 Temperature_Celsius     0x0022   067   048   ---    Old_age   Always       -       33 (Min/Max 25/48)
199 SATA_CRC_Error          0x0032   100   100   ---    Old_age   Always       -       0
212 SATA_PHY_Error          0x0032   100   100   ---    Old_age   Always       -       0
230 Perc_Write/Erase_Count  0x0032   100   100   ---    Old_age   Always       -       512
232 Perc_Avail_Resrvd_Space 0x0033   100   100   004    Pre-fail  Always       -       100
233 Total_NAND_Writes_GiB   0x0032   100   100   ---    Old_age   Always       -       31733
241 Total_Writes_GiB        0x0030   253   253   ---    Old_age   Offline      -       3946
242 Total_Reads_GiB         0x0030   253   253   ---    Old_age   Offline      -       13096
244 Thermal_Throttle        0x0032   000   100   ---    Old_age   Always       -       0

Without any documentation, the best one can do to understand these values, is to make educated guesses based on the attribute names. But that doesn't seem very professional, now does it? And this is a device meant for Professionals, is it not? So how about some docs? Smiley Happy