S.M.A.R.T. attributes (original) (raw)
This is the list of all known attributes supported by IDE and Serial ATA hard disks. Note: some manufacturers may use the attributes for different purposes also. Attributes not listed here are "vendor specific" attributes (their purpose is not known).
1
Raw Read Error Rate
Errors occured while reading raw data from a disk
Indicate problem with the disk surface or the read/write heads.
Critical attribute
2
Throughput Performance
General throughput performance of the hard disk
Indicate problem with motor, servo or bearings.
3
Spin Up Time
Time needed by spindle to spin-up to full RPM
Indicate problem with motor or bearings.
Critical attribute
4
Start/Stop Count
Count of start/stop cycles of spindle
This value does not directly affect the condition of the drive.
5
Reallocated Sector Count (Reallocated Sectors Count)
Count of sectors moved to the spare area
Indicate problem with the disk surface or the read/write heads.
Critical attribute
6
Read Channel Margin
Margin of a channel while reading data
The exact function of this attribute is not specified.
7
Seek Error Rate
Rate of positioning errors of the read/write heads
Indicate problem with servo, head. High temperature can also cause this problem.
Critical attribute
8
Seek Time Performance
Average time of seek operations of the heads
Indicate problem with servo.
Critical attribute
9
Power-On Time Count
Total time the drive is powered on
The unit of the measure depends on the manufacturer.
10
Spin Retry Count
Retry count of spin start attempts
Indicate problem with motor, bearings or power supply.
Critical attribute
11
Drive Calibration Retry Count
Number of attempts to calibrate a drive
Indicate problem with motor, bearings or power supply.
12
Drive Power Cycle Count
Number of complete power on/off cycles
This value does not directly affect the condition of the drive.
13
Soft Read Error Rate
Number of software read errors
The number of uncorreactable read errors.
184
End-to-End error
Number of parity errors during transfer between the cache RAM and the host.
187
Reported Uncorrectable Errors
Errors that could not be recovered using hardware error correction methods.
188
Command Timeout
Number of aborted operations due to HDD timeout. Value larger than zero may indicate power supply or data cable connection problems.
189
High Fly Writes
Number of unsafe write operations outside the normal head flying range.
190
Airflow Temperature
Airflow temperature
The temperature of the air inside the hard disk housing.
191
Mechanical Shock
Count of problems caused by mechanical shock
Acceleration (for example falling) can cause mechanical shock.
192
Power off Retract Cycle
Count of power off cycles
This value does not directly affect the condition of the drive.
193
Load/Unload Cycle Count
Count of load/unload cycles
Number of cycles the head moved into landing zone position.
194
HDD Temperature
Disk temperature
The temperature inside the hard disk housing.
195
Hardware ECC Recovered
Count of correctable errors
Number of errors corrected by the internal error correcting mechanism.
196
Reallocation Event Count
Count of sector remap operations
Number of all (successful and failed) remap operations.
Critical attribute
197
Current Pending Sector Count
Count of unstable sectors
These pending sectors may be remapped to the spare area.
Critical attribute
198
Off-Line Uncorrectable Sector Count
Count of uncorrectable errors when reading/writing
Indicate problem with the disk surface or the read/write heads.
Critical attribute
199
Ultra ATA CRC Error Count
Count of errors during data transfer between disk and host
Indicate problem with the power supply or data cable.
200
Write Error Rate
Errors occured while writing raw data from a disk
Indicate problem with the disk surface or the read/write heads.
201
Soft Read Error Rate
Number of software read errors
The number of uncorreactable read errors.
202
Data Address Mark Errors
Number of data address mark errors
Number of incorrect or invalid address marks.
203
Run Out Cancel
Number of data correction errors
Invalid error correction checksum found during error correction.
204
Soft ECC Correction
Number of corrected data errors
Errors corrected by the internal error correction mechanism.
205
Thermal Asperity Rate
Number of thermal problems
Total number of problems caused by high temperature.
206
Flying Height
Head flying height
The height of the disk heads above the disk surface.
207
Spin High Current
Current value during spin up
The current needed to spin up the drive.
208
Spin Buzz
Number of cycles needed to spin up
The number of retries during spin up because of low current available.
209
Offline Seek Performance
Drive performance during offline operations
The seek performance of the drive during internal self tests.
211
Vibration During Write
Vibration encountered during write operations.
212
Shock During Write
Shock encountered during write operations.
220
Disk Shift
Distance of the disk has shifted relative to the spindle
Incorrect disk spin can be cause by mechanical shock or high temperature.
221
G-Sense Error Rate
Number of mechanical errors
Number of errors resulting from shock or vibration.
222
Loaded Hours
Number of powered on hours
This value is constantly increasing (once per every hour).
223
Load/Unload Retry Count
Number of load/unload operations
The number of drive head enters/leaves the data zone.
224
Load Friction
Mechanical friction rate
The rate of friction between mechanical parts. Indicate problem with the mechanical subsystem of the drive.
226
Load-in Time
Total time the heads are loaded
The time while the read/write heads are in the data zone.
227
Torque Amplification Count
Rate of torque increase
Torque increase during the spin up operation of the hard disk.
228
Power-off Retract Count
Number of power off cycles
The number of times the head was retracted as a result of power loss.
230
GMR Head Amplitude
Head positioning amplitude
Head moving distances between operations.
231
Hard Disk Temperature
Disk temperature
The temperature inside the hard disk housing.
240
Head Flying Hours
Number of head positioning hours
Time spent during the positioning of the drive heads.
250
Read Error Retry Rate
Number of retries during read operations
Number of errors found during reading a sector from disk surface.
254
Free Fall Event Count
Number of free fall events detected by the accelerometer sensor.
This is the list of all known attributes supported by SCSI hard disks. Note: some manufacturers may use the attributes for different purposes also. Attributes not listed here are "vendor specific" attributes (their purpose is not known).
01
Buffer over/under run counters
02_0000
Write errors corrected without substantial delay
02_0001
Write errors corrected with possible delays
02_0002
Total write errors
02_0003
Total write errors corrected
02_0004
Total write errors corrected by algorythm
02_0005
Total bytes written
02_0006
Total uncorrected write errors
03_0000
Read errors corrected by ECC hardware method
03_0001
Read errors corrected with possible delays
03_0002
Total read errors
03_0003
Total read errors corrected
03_0004
Total read errors corrected by algorythm
03_0005
Total bytes read
03_0006
Total uncorrected read errors
04_0000
Read reverse errors corrected by ECC hardware method
04_0001
Read reverse errors corrected with possible delays
04_0002
Total read reverse errors
04_0003
Total read reverse errors corrected
04_0004
Total read reverse errors corrected by algorythm
04_0005
Total bytes read reverse
04_0006
Total uncorrected read reverse errors
05_0000
Verify errors corrected without substantial delay
05_0001
Verify errors corrected with possible delays
05_0002
Total verify errors
05_0003
Total verify errors corrected
05_0004
Total verify errors corrected by algorythm
05_0005
Total bytes verified
05_0006
Total uncorrected verify errors
06_0000
Non medium errors
07
Last error event
0B
Last deferred error or asynchronous event
0D_0000
Temperature
0D_0001
Reference temperature
0E_0001
Manufacture date (year/week)
0E_0002
Accounting date
0E_0003
Specified cycle count over device lifetime
0E_0004
Accumulated start-stop cycles
0F
Application client parameter data
10
Self test results log
18
Protocol specific port log
37_0000
Blocks sent to initiator
37_0001
Blocks received from initiator
37_0002
Blocks read from cache and sent to initiator
37_0003
I/O commands with size smaller than segment size
37_0004
I/O commands with size larger than segment size
3E_0000
Power on time
3E_0008
Remaining minutes until next internal test