SMART-Attribute summary

S.M.A.R.T – ID: 1
S.M.A.R.T – Name:
Read Error Rate
Micron:
Raw read error rate

S.M.A.R.T – Description:
This SMART attribute describes the number of uncorrectable read errors that occurred over the entire lifetime of the storage medium.

WesternDigital, shortened:
Stores data related to the rate of hardware read errors encountered when reading data from a disk surface.

S.M.A.R.T – ID: 2
S.M.A.R.T – Name:
Throughput Performance

S.M.A.R.T – Description:
General assessment of the throughput speed of a storage medium.

WesternDigital, complete:
Total (general) throughput performance of a hard disk drive. If the value of this attribute decreases, there is a high probability that there is a problem with the hard drive.

S.M.A.R.T – ID: 3
S.M.A.R.T – Name:
Spin-Up Time

S.M.A.R.T – Description:
Average disk start time. An increasing value may indicate a problem with the disk servo motor.

WesternDigital, complete:
Average spindle startup time (from zero rpm to full operational readiness [milliseconds]).

S.M.A.R.T – ID: 4
S.M.A.R.T – Name:
Start/Stop Count

S.M.A.R.T – Description:
Average spindle startup time (from zero rpm to full operational readiness [milliseconds]).

WesternDigital, complete:
A list of spindle start/stop cycles. The spindle is powered on and therefore the count is incremented both when the hard drive is powered back on after previously being completely powered off (unplugged from the power source) and when the hard drive returns from the previous sleep mode.

S.M.A.R.T – ID: 5
S.M.A.R.T – Name:
Reallocated Sectors Count
Micron:
Reallocated NAND block count

S.M.A.R.T – Description:
This attribute indicates how many reserve sectors are already in use. An increasing value indicates problems with the memory surface. At high values, a very critical attribute, which requires immediate replacement of the medium.

Crucial, shortened:
The number of blocks retired through this process of continuous quality assessment of NAND blocks. SSD firmware retires NAND blocks for various reasons.

WesternDigital, shortened:
Number of reassigned sectors. The raw value represents a count of the bad sectors that were found and remapped. The higher the attribute value, the more sectors the drive had to reallocate. This value is primarily used as a measure of the drive's life expectancy

Samsung, complete:
The raw value of this attribute represents the number of sectors that have been moved as a result of a read error, write error, or a verification error. If the firmware detects any of these types of errors, all valid data in the block the error originates from must be transferred to a new block. This number should be low because a high number would indicate a large number of failures.

S.M.A.R.T – ID: 6
S.M.A.R.T – Name:
Read Channel Margin

S.M.A.R.T – Description:
Attribute not directly specified. Pay attention to the manufacturer's SMART rating. Further information here.

WesternDigital, complete:
Edge of a channel when reading data. The function of this attribute is unspecified.

S.M.A.R.T – ID: 7
S.M.A.R.T – Name:
Seek Error Rate

S.M.A.R.T – Description:
Records magnetic head positioning errors. If this value worsens, this may indicate a defect in the servo motor or other mechanical parts.

WesternDigital, shortened:
Search error rate of the magnetic heads. If the mechanical positioning system partially fails, search errors will occur. Such an error can be due to numerous factors such as: B. damage to a servo or thermal expansion of the hard drive.

S.M.A.R.T – ID: 8
S.M.A.R.T – Name:
Seek Time Performance

S.M.A.R.T – Description:
Displays the average speed of seek operations of the hard drive's magnetic head. The parameters are not considered critical by most manufacturers. However, a bad value can indicate mechanical problems.

WesternDigital, complete:
Average performance of the search operations of the magnetic heads. If this attribute decreases, it is a sign of problems in the mechanical subsystem.

S.M.A.R.T – ID: 9
S.M.A.R.T – Name:
Power-On Hours (POH)

S.M.A.R.T – Description:
Operating hours (how long the disk has been in operation in hours).

WesternDigital, shortened:
Counting the hours when switched on.

Samsung, complete:
The raw value of this attribute shows the total count of hours the drive has spent in the power-on state.

S.M.A.R.T – ID: 10
S.M.A.R.T – Name:
Spin Retry Count

S.M.A.R.T – Description:
Number of attempts to start up the hard drive to the respective final speed of the platter (5400rpm, 7200rpm, etc.). If this value increases significantly, this may indicate problems with the storage medium's servo motor.

WesternDigital, shortened:
Number of retries for spin start attempts. This attribute stores a total number of spin start attempts to reach full operating speed.

S.M.A.R.T – ID: 11
S.M.A.R.T – Name:
Recalibration retries

S.M.A.R.T – Description:
Shows the number of unsuccessful read head calibrations over the entire lifetime of the data carrier.

WesternDigital, shortened:
This attribute indicates the number of times a recalibration was requested (under the condition that the first attempt was unsuccessful).

S.M.A.R.T – ID: 12
S.M.A.R.T – Name:
Power cycle count

S.M.A.R.T – Description:
Number of times the media is turned on and off. A high value indicates long or very intensive use of the storage medium. This counter can also include “power cycles” during operation, which occur when the medium is not in use and is switched off to save energy.

WesternDigital, shortened:
This attribute indicates the number of complete hard drive power cycles.

Samsung, complete:
The raw value of this attribute reports the cumulative number of power on/off cycles. This includes both sudden power off and normal power off cases.

S.M.A.R.T – ID: 13
S.M.A.R.T – Name:
Soft read error count

S.M.A.R.T – Description:
The number of uncorrectable read errors.

Kingston, verkürzt:
The Soft Read Error Rate includes all correctable ECC (CECC) errors tracked by the SF-2000. This attribute represents the correctable error count since the first drive provisioning.

WesternDigital, complete:
Uncorrected read errors reported to the operating system.

S.M.A.R.T – ID: 22
S.M.A.R.T – Name:
Current helium level

S.M.A.R.T – Description:
WesternDigital specific, possibly unknown for other manufacturers.

WesternDigital, complete:
Especially for He8 drives from HGST. This value measures the helium inside the drive specific to that manufacturer. It is a pre-fail attribute that is triggered as soon as the drive detects that the internal environment is out of specification

S.M.A.R.T – ID: 99
S.M.A.R.T – Name:
Standard unknown
Maxtor:
Average FHC

S.M.A.R.T – Description:
According to the manufacturer Flying Height Control. See also attribute 206.

S.M.A.R.T – ID: 100
S.M.A.R.T – Name:
Erase/Program cycles

S.M.A.R.T – Description:
The total number of erase/program cycles for all SSD storage over its lifetime. With an SSD, the number of writes is limited. The exact values ​​depend on the type and make of the flash memory chip.

Laut Kingston, verkürzt:
This attribute returns a byte count in 64 GB increments. The attribute indicates the number of data deleted so far in bytes.

S.M.A.R.T – ID: 101
S.M.A.R.T – Name:
Standard unknown
Maxtor:
Maximum FHC

S.M.A.R.T – Description:
According to the manufacturer Flying Height Control. See also attribute 206.

S.M.A.R.T – ID: 103
S.M.A.R.T – Name:
Translation Table Rebuild

S.M.A.R.T – Description:
The number of events in which internal block address tables were corrupted and then rebuilt. An SSD internally contains a table of all memory blocks. Each time a write is made, a new mapping is generated and added to the map table. When reading an address, SSD first looks for the physical address corresponding to the requested address in the table, and then accesses the memory area to read the corresponding data.

S.M.A.R.T – ID: 148
S.M.A.R.T – Name:
Standard unknown
ADATA:
SLC total erase count

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 149
S.M.A.R.T – Name:
Standard unknown
ADATA:
SLC max erase count

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 150
S.M.A.R.T – Name:
Standard unknown
ADATA:
SLC min erase count

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 151
S.M.A.R.T – Name:
Standard unknown
ADATA:
SLC average erase count

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 160
S.M.A.R.T – Name:
Standard unknown
ADATA:
Uncorrectable sector count

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 161
S.M.A.R.T – Name:
Standard unknown
ADATA:
Number of pure spare

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 163
S.M.A.R.T – Name:
Standard unknown
ADATA:
Number of initial invalid

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 164
S.M.A.R.T – Name:
Standard unknown
ADATA:
TLC total erase count

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 165
S.M.A.R.T – Name:
Standard unknown
ADATA:
TLC max erase count

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 166
S.M.A.R.T – Name:
Standard unknown
ADATA:
TLC min erase count

S.M.A.R.T – Description:
Unknown standard, possibly ADATA specific.

S.M.A.R.T – ID: 170
S.M.A.R.T – Name:
Reserved block count

S.M.A.R.T – Description:
On an SSD, this attribute describes the state of the reserve blocks. The value indicates the percentage of blocks remaining. The raw value sometimes includes the actual number of reserve blocks used.

S.M.A.R.T – ID: 171
S.M.A.R.T – Name:
Program Fail Count
Programmfehler

S.M.A.R.T – Description:
Errors caused by programs due to incorrect provision of parameters. Comparable to attribute 181.

WesternDigital, complete:
The total number of errors in the operation of the flash program since the drive was mounted. Identical to attribute 181.

S.M.A.R.T – ID: 172
S.M.A.R.T – Name:
Erase Fail count
Löschfehler

S.M.A.R.T – Description:
The number of times an SSD storage erase operation failed. The complete write cycle of a flash memory consists of two phases. First the memory must be cleared and then the new data must be saved. When flash memory is exhausted, it can no longer be written to and is only readable.

WesternDigital, complete:
Counts the number of flash erase errors. This attribute returns the total number of failed flash erases since the drive was mounted. This attribute is identical to attribute 182.

S.M.A.R.T – ID: 173
S.M.A.R.T – Name:
Wear Leveling Count
Micron:
Average block erase count

S.M.A.R.T – Description:
The maximum number of erase operations performed on a single flash memory block.

WesternDigital, complete:
Counts the maximum worst delete count on each block.

S.M.A.R.T – ID: 174
S.M.A.R.T – Name:
Unexpected Power Loss

S.M.A.R.T – Description:
The number of unexpected power outages during power failure before a hard drive power off command is received. The lifespan of a hard drive during such shutdowns is significantly shorter than during a normal shutdown. With an SSD, there is a risk that the internal state table will be lost if an unexpected shutdown occurs.

WesternDigital, shortened:
Also known as “Power-off Retract Count” in traditional HDD terminology. The raw value indicates the number of dirty shutdowns, cumulative over the lifespan of an SSD, where a "dirty shutdown" is removing power without STANDBY IMMEDIATELY as the last command.

S.M.A.R.T – ID: 175
S.M.A.R.T – Name:
Program Fail Count (chip)

S.M.A.R.T – Description:
The number of times a flash memory write failed. The writing process is technically called “programming flash memory,” hence the attribute name. When flash memory is exhausted, it can no longer be written to and is only readable. The raw value shows the actual number of errors.

WesternDigital, shortened:
Final test result in microseconds until cap discharges, saturated at its maximum value. Also logs minutes since last test and lifetime number of tests.

S.M.A.R.T – ID: 176
S.M.A.R.T – Name:
Erase Fail Count (chip)

S.M.A.R.T – Description:
The number of times a flash memory erase operation failed. The complete write cycle of a flash memory consists of two phases. First the memory must be erased and then the data must be recorded (“programmed”) into the memory. When flash memory is exhausted, it can no longer be written to and is only readable. The raw value shows the actual number of errors.

WesternDigital, complete:
SMART parameter displays a series of flash erase command errors.

S.M.A.R.T – ID: 177
S.M.A.R.T – Name:
Wear Leveling Count (chip)

S.M.A.R.T – Description:
The maximum number of erase operations performed on a single flash memory block.

WesternDigital, complete:
Delta between most worn and least worn flash blocks. It describes more technically how well/badly the wear leveling of the SSD works.

Samsung, complete:
This attribute represents the number of times a block has been erased. This value is directly related to the lifetime of the SSD. The raw value of this attribute shows the average erase cycles of total blocks.

S.M.A.R.T – ID: 178
S.M.A.R.T – Name:
Used reserved block count (chip)

S.M.A.R.T – Description:
On an SSD, this attribute describes the state of the reserve block pool. The value of the attribute indicates the percentage of the pool remaining. The raw value sometimes includes the actual number of reserve blocks used.

S.M.A.R.T – ID: 179
S.M.A.R.T – Name:
Used reserved block count

S.M.A.R.T – Description:
On an SSD, this attribute describes the state of the reserve block pool. The value of the attribute indicates the percentage of the pool remaining. The raw value sometimes includes the actual number of reserve blocks used.

Samsung, complete:
This attribute represents the number of reserved blocks that have been used as a result of a read, program or erase failure. This value is related to attribute 5 (Reallocated Sector Count) and will vary based on SSD density.

S.M.A.R.T – ID: 180
S.M.A.R.T – Name:
Unused Reserved Block Count
Crucial:
NVMe: Available Spare Blocks
Samsung:
Unused Reserved Block Count (total)
Micron:
Unused reserve (spare) NAND blocks

S.M.A.R.T – Description:
Shows the number of still available or unused reserve blocks for swapping out defective blocks.

Samsung, complete:
This attribute represents the number of reserved blocks in case that the device does not use blocks being allocated for read, program, erase operation

If the value reaches 0, there is a possibility that the SSD will be put into read-only mode.

S.M.A.R.T – ID: 181
S.M.A.R.T – Name:
Total number of program errors or number of accesses without 4K orientation

S.M.A.R.T – Description:
Errors caused by programs due to incorrect provision of parameters. Comparable to attribute 171.

WesternDigital, complete:
Total number of errors operating the flash program since the drive was mounted. Number of user data accesses (both reads and writes) where LBAs are not aligned to 4 KiB (LBA % 8 != 0) or where the size is not modulus 4 KiB (block count != 8), assuming one logical block size (LBS) = 512 B

Samsung, complete:
This attribute represents a total count of the number of failed program requests (failed writes).

S.M.A.R.T – ID: 182
S.M.A.R.T – Name:
Erase Fail Count (total)

S.M.A.R.T – Description:
Total number of wipe errors.

Samsung, complete:
This attribute represents a total count of the number of failed
erase requests.

S.M.A.R.T – ID: 183
S.M.A.R.T – Name:
SATA Downshift Error Count
Samsung:
Runtime Bad Count (total)

S.M.A.R.T – Description:
The number of times the SATA transfer speed had to be reduced to successfully transfer data. A possible solution if the value decreases is to replace the data cable.

WesternDigital, shortened:
Either the number of link speed downshifts (e.g. from 6 Gbps to 3 Gbps) or the total number of data blocks with detected uncorrectable errors that occurred during normal operation.

Samsung, complete:
Equal to the sum of the Program Fail count (attribute 181), the Program Erase Fail count (attribute 182), and the Read Fail count. This summary value represents the total count of all read/program/erase failures.

S.M.A.R.T – ID: 184
S.M.A.R.T – Name:
End-to-End error
Datenpfadfehler / IOEDC
Micron:
Error correction count

S.M.A.R.T – Description:
Parity error between the media and the drive controller

WesternDigital, complete:
This attribute is part of Hewlett-Packard's SMART IV technology, as well as part of other vendors' I/O error detection and correction schemes, and contains a number of parity errors that occur in the data path to the drive's cache RAM.

Samsung, complete:
The number of errors encountered within the SSD data path from host to NAND or from NAND to host.

S.M.A.R.T – ID: 185
S.M.A.R.T – Name:
Head Stability

S.M.A.R.T – Description:
No reliable information or descriptions known

S.M.A.R.T – ID: 186
S.M.A.R.T – Name:
Induced Op-Vibration Detection

S.M.A.R.T – Description:
No reliable information or descriptions known

S.M.A.R.T – ID: 187
S.M.A.R.T – Name:
Reported uncorrectable errors
Samsung:
Uncorrectable Error Count

S.M.A.R.T - Description:
Errors also caused by ECC could not be corrected.

Samsung, complete:
The total number of errors that could not be recovered using ECC

S.M.A.R.T – ID: 188
S.M.A.R.T – Name:
Command Timeout

S.M.A.R.T – Description:
Number of commands aborted because the request timed out.

S.M.A.R.T – ID: 189
S.M.A.R.T – Name:
High fly writes

S.M.A.R.T – Description:
The number of write errors caused by the write head being outside the normal height range above the disk platter.

WesternDigital, shortened:
HDD manufacturers implement a hover height sensor that attempts to provide additional protection for writes by detecting when a recording head flies outside its normal operating range. If an unsafe hover height occurs, the writing process stops and the information is rewritten or reallocated to a safe area of ​​the hard drive.

S.M.A.R.T – ID: 190
S.M.A.R.T – Name:
Temperature – Luftstromtemperatur

S.M.A.R.T - Description:
The temperature of the air inside the hard drive case

Samsung, complete:
The current temperature of the area surrounding the NAND chips
inside the SSD.

S.M.A.R.T – ID: 191
S.M.A.R.T – Name:
Mechanical Shock
G-sense error rate

S.M.A.R.T – Description:
Acceleration (e.g. falling) can lead to mechanical shocks.

WesternDigital, complete:
The number of errors resulting from externally induced shocks and vibrations.

S.M.A.R.T – ID: 192
S.M.A.R.T – Name:
Power-off retract count

S.M.A.R.T – Description:
Number of shutdown or emergency shutdown cycles

S.M.A.R.T – ID: 193
S.M.A.R.T – Name:
Load cycle count
Load/Unload cycle count

S.M.A.R.T – Description:
Number of cycles the head moved to the landing zone position.

WesternDigital, shortened:
Number of charge/discharge cycles into the head landing zone position. Some drives use 225 (0xE1) for the number of load cycles instead. Western Digital rates its VelociRaptor drives at 600,000 charge/discharge cycles and WD Green drives at 300,000 cycles;^[the latter are designed to frequently discharge heads to save energy. On the other hand, the WD3000GLFS (a desktop drive) is only specified for 50,000 charge/discharge cycles.

S.M.A.R.T – ID: 194
S.M.A.R.T – Name:
Temperatur (Celsius)

S.M.A.R.T – Description:
Displays the device temperature if a corresponding sensor is present.

S.M.A.R.T – ID: 195
S.M.A.R.T – Name:
Hardware ECC recovered
Samsung:
ECC Error Rate

S.M.A.R.T – Description:
Number of errors corrected by the internal error correction mechanism.

Samsung, complete:
The percentage of ECC correctable errors.

S.M.A.R.T – ID: 196
S.M.A.R.T – Name:
Reallocation event count

S.M.A.R.T – Description:
Performed reallocations from defective sectors to reserve sectors.

S.M.A.R.T – ID: 197
S.M.A.R.T – Name:
Current pending sector count
Micron:
Current pending ECC count

S.M.A.R.T – Description:
Number of sectors that have been marked as bad by read errors and are waiting for a reserve sector to be allocated from the reserve area.

WesternDigital, shortened:
Number of “unstable” sectors (waiting to be reallocated due to unrecoverable read errors). If an unstable sector is subsequently successfully read, the sector is remapped and this value is reduced. Read errors in a sector will not immediately remap the sector (as the correct value cannot be read and therefore the value to be remapped is not known and may become readable later). Instead, the drive firmware remembers that the sector needs to be remapped, and reassigns it the next time it is successfully read.

S.M.A.R.T – ID: 198
S.M.A.R.T – Name:
Uncorrectable sector count
WesternDigital:
Offline uncorrectable
Micron:
SMART offline scan uncorrectable error count

S.M.A.R.T – Description:
Number of bad sectors that cannot be corrected

WesternDigital, complete:
The total number of uncorrectable errors while reading/writing a sector. An increase in the value of this attribute indicates defects in the disk surface and/or problems in the mechanical subsystem

S.M.A.R.T – ID: 199
S.M.A.R.T – Name:
UltraDMA CRC error count

S.M.A.R.T – Description:
Indicates a problem with the power or data cable.

WesternDigital, complete:
The number of errors in data transmission over the interface cable, as determined by ICRC (Interface Cyclic Redundancy Check).

Samsung, complete:
The number of Cycle Redundancy Check (CRC) errors. If there is a problem between the host and the SSD, the CRC engine will tally the error and store it in this attribute.

S.M.A.R.T – ID: 200
S.M.A.R.T – Name:
Write error rate
WesternDigital:
Multi-Zone error rate

S.M.A.R.T – Description:
Indicates a problem with the hard drive surface or read/write heads.

WesternDigital, complete:
The number of errors found while writing a sector. The higher the value, the worse the mechanical condition of the hard drive.

S.M.A.R.T – ID: 201
S.M.A.R.T – Name:
Soft Read Error Rate
Maxtor:
Off Track Errors

S.M.A.R.T – Description:
Number of errors that could not be corrected by software (read errors)

S.M.A.R.T – ID: 202
S.M.A.R.T – Name:
Data address mark errors
Samsung:
SSD Mode Status
Micron:
Percent lifetime remaining
Crucial:
Percentage Lifetime Remaining (ATA)
Percentage Lifetime Used (PCIe)

S.M.A.R.T – Description:
The number of errors that occur when a read head searches for a requested sector.

Crucial, shortened:
Percent Life Remaining (percentage of life over PCIe): This attribute is exactly as its name suggests. It indicates what percentage of the drive's expected lifespan has been reached at a given point in time. If the SSD is brand new, attribute 202 reports “100”. When the specified lifespan is reached, it has a value of “0,” meaning 0 percent remaining lifespan.

Samsung, complete:
This represents the internal SSD status. When the device operates normally, it shows 0x00. When the tantal-cap fails, it shows 0x10. When the mode is on Read only service, it shows 0x20.

S.M.A.R.T – ID: 203
S.M.A.R.T – Name:
Run out cancel

S.M.A.R.T – Description:
An invalid error correction checksum was found during error correction

S.M.A.R.T – ID: 204
S.M.A.R.T – Name:
Soft ECC correction

S.M.A.R.T – Description:
Errors corrected by the internal error correction mechanism

S.M.A.R.T – ID: 205
S.M.A.R.T – Name:
Thermal asperity rate (TAR)

S.M.A.R.T – Description:
Total number of problems caused by high temperatures.

S.M.A.R.T – ID: 206
S.M.A.R.T – Name:
Flying height
Micron:
Write error rate

S.M.A.R.T – Description:
The distance of the read heads to the disk surface

S.M.A.R.T – ID: 207
S.M.A.R.T – Name:
Spin High Current

S.M.A.R.T – Description:
Amount of power needed to spin up a hard drive. Only used in rotating hard drives.

S.M.A.R.T – ID: 208
S.M.A.R.T – Name:
Spin Buzz

S.M.A.R.T – Description:
The number of retries during boot due to low available power.

S.M.A.R.T – ID: 209
S.M.A.R.T – Name:
Offline seek performance

S.M.A.R.T – Description:
The performance of the drive during internal self-tests

S.M.A.R.T – ID: 210
S.M.A.R.T – Name:
RAIN Successful Recovery Page Count
Micron:
Successful RAIN recovery count

S.M.A.R.T – Description:

S.M.A.R.T – ID: 211
S.M.A.R.T – Name:
Vibration during write

S.M.A.R.T – Description:

S.M.A.R.T – ID: 212
S.M.A.R.T – Name:
Shock during write

S.M.A.R.T – Description:

S.M.A.R.T – ID: 220
S.M.A.R.T – Name:
Disk Shift

S.M.A.R.T – Description:
Incorrect hard drive rotations. May be caused by mechanical shock or high temperatures.

S.M.A.R.T – ID: 221
S.M.A.R.T – Name:
G-Sense Error Rate
Hitachi:
Shock Sense Error Rate

S.M.A.R.T – Description:
Number of errors due to shock or strong vibration.

S.M.A.R.T – ID: 222
S.M.A.R.T – Name:
Loaded hours

S.M.A.R.T – Description:
By default, this value constantly increases every hour.

S.M.A.R.T – ID: 223
S.M.A.R.T – Name:
Load/Unload retry count

S.M.A.R.T – Description:
The number of drive heads entering and leaving the data zone.

S.M.A.R.T – ID: 224
S.M.A.R.T – Name:
Load friction

S.M.A.R.T – Description:
The rate of friction between mechanical parts. Indicates a possible problem with the drive's mechanics.

S.M.A.R.T – ID: 225
S.M.A.R.T – Name:
Load/Unload cycle count

S.M.A.R.T – Description:
The time during which the read/write heads are in the data zone.

S.M.A.R.T – ID: 226
S.M.A.R.T – Name:
Load-in Time

S.M.A.R.T – Description:
The time a disk head spent in the data zone and not in the parking area or on a head ramp. The value counts down, usually from 100 to 0. The raw value can include the number in hours.

S.M.A.R.T – ID: 227
S.M.A.R.T – Name:
Torque amplification count

S.M.A.R.T – Description:
Torque increase during hard drive startup.

S.M.A.R.T – ID: 228
S.M.A.R.T – Name:
Power-Off retract cycle

S.M.A.R.T – Description:
The number of events in which the read head had to be retracted due to a power interruption.

S.M.A.R.T – ID: 230
S.M.A.R.T – Name:
GMR Head Amplitude

S.M.A.R.T – Description:
The distance the reading head had to travel between different actions.

S.M.A.R.T – ID: 231
S.M.A.R.T – Name:
Temperature

S.M.A.R.T – Description:
The temperature inside the housing. Depending on whether a sensor was installed or possibly a strange number in the case of a sensor that was not connected.

S.M.A.R.T – ID: 232
S.M.A.R.T – Name:
Available Reserved Space
Available reserved space

S.M.A.R.T – Description:
The attribute is used in SSDs to indicate the remaining reserved space. The value counts down, usually from 100 to 0.

S.M.A.R.T – ID: 233
S.M.A.R.T – Name:
Media wearout indicator
Wear level indicator

S.M.A.R.T – Description:
Remaining lifespan of flash storage (ATA or NVMe SSD).

S.M.A.R.T – ID: 235
S.M.A.R.T – Name:
POR Recovery Count

S.M.A.R.T – Description:
Samsung, complete:
A count of the number of sudden power off cases. If there is a sudden power off, the firmware must recover all of the mapping and user data during the next power on. This is a count of the number of times this has happened.

S.M.A.R.T – ID: 240
S.M.A.R.T – Name:
Head Flying hours
Fujitsu:
Transfer Error Rate

S.M.A.R.T – Description:
Shows the time spent positioning the read head.

S.M.A.R.T – ID: 241
S.M.A.R.T – Name:
Total LBA´s written

S.M.A.R.T – Description:
The total number of 512-byte sectors read over the lifetime of the disk.

Samsung, complete:
Represents the total size of all LBAs (Logical Block Address) required for all of the write requests sent to the SSD from the OS. To calculate the total size (in Bytes), multiply the raw value of this attribute by 512B.

S.M.A.R.T – ID: 242
S.M.A.R.T – Name:
Total LBA´s read

S.M.A.R.T – Description:
The total number of 512-byte sectors read over the lifetime of the disk.

Samsung, complete:
This represents the total size of all LBAs (Logical Block Address) read count.

S.M.A.R.T – ID: 246
S.M.A.R.T – Name:
Standard unknown
Micron:
Cumulative host sectors written

S.M.A.R.T – Description:
Unknown standard. In certain circumstances Micron specific.

S.M.A.R.T – ID: 247
S.M.A.R.T – Name:
Standard unknown
Micron:
Number of NAND pages of data written by the host

S.M.A.R.T – Description:
Unknown standard. In certain circumstances Micron specific.

S.M.A.R.T – ID: 248
S.M.A.R.T – Name:
Standard unknown
Micron:
Number of NAND pages written by the FTL

S.M.A.R.T – Description:
Unknown standard. In certain circumstances Micron specific.

S.M.A.R.T – ID: 250
S.M.A.R.T – Name:
Read error retry rate
Samsung:
SATA Interface Downshifts (total)

S.M.A.R.T – Description:
Counts the errors that occurred while reading a sector.

Samsung, complete:
This attribute is used to count the number of interface downshifts encountered between the host and the device. If the current connection speed is lower than the previous negotiation speed. The interface downshift count increases.

S.M.A.R.T – ID: 254
S.M.A.R.T – Name:
Free Fall Protection

S.M.A.R.T – Description:
Shows the number of free fall events that were detected by the firmware and the installed sensor.