Defines | |
| #define | ATTR_INVALID 0x0 |
| #define | ATTR_READ_ERROR_RATE 0x1 |
| Raw Read Error Rate: Represents the rate of uncorrected read errors. Lower values indicate that there is a problem with either disk surface or read/write heads. | |
| #define | ATTR_THROUGHPUT_PERF 0x2 |
| Throughput Performance: Represents the throughput performance of the drive, i.e. The speed at which the drive is reading and writing data. | |
| #define | ATTR_SPIN_UP_TIME 0x3 |
| Spin Up Time: Represents the average amount of time required to spin up the drive spindle to operational speed from a stopped state. | |
| #define | ATTR_START_STOP_COUNT 0x4 |
| Start/Stop Count: Represents the number of start/stop cycles for the drive. The raw value indicates the count of start/stop cycles for the drive. The drive being powered on/off or suspended/woken up are considered as start/stop cycles. | |
| #define | ATTR_REALLOC_SECTOR_COUNT 0x5 |
| Reallocated Sector Count: Represents the amount of spare sector pool available. Spare sectors are used to replace sectors that became bad for some reason (for instance, if a read error occurs). Therefore the more sectors reallocated, the worse the condition of the drive. A high value represents few reallocated sectors, a low value represents a disk in poor physical condition. | |
| #define | ATTR_READ_CHANNEL_MARGIN 0x6 |
| Read Channel Margin: Margin of a channel while reading data. The function of this attribute is not specified. | |
| #define | ATTR_SEEK_ERROR_RATE 0x7 |
| Seek Error Rate: Represents the number of seek errors. Each time the drive attempts a seek operation, but fails to position its head correctly, the seek error rate increases. | |
| #define | ATTR_SEEK_TIME_PERF 0x8 |
| Seek Time Performance: Represents how efficiently the drive is performing seek operations. A low value indicates problems with the drive subsystem, for instance the servo responsible for positioning the head. | |
| #define | ATTR_POWER_ON_TIME 0x9 |
| Power On Hours Count: This is an informative attribute, the raw value of which displays the number of hours the drive has been powered on for. | |
| #define | ATTR_SPIN_RETRY_COUNT 0xA |
| Spin Retry Count: Represents the number of times a drive fails to spin its spindle up to operation speed on the first attempt. The lower the value, the more retries have occurred. | |
| #define | ATTR_CALIBRATION_RETRY_COUNT 0xB |
| Calibration Retry Count: Calibration is the act of repositioning the drive read/write head to cylinder 0. This value represents the number of times a calibration has failed on the first attempt. | |
| #define | ATTR_POWER_CYCLE_COUNT 0xC |
| Power Cycle Count: Informative attribute, the raw value of which represents the number of drive power on/drive power off cycles for the disk. | |
| #define | ATTR_SOFT_READ_ERROR_RATE 0xD |
| Soft Read Error Rate: Uncorrected read errors reported to the operating system. | |
| #define | ATTR_DOWNSHIFT_ERROR_COUNT 0xB7 |
| #define | ATTR_END_TO_END_ERROR 0xB8 |
| #define | ATTR_HEAD_STABILITY 0xB9 |
| #define | ATTR_INDUCED_OP_VIB_DETECT 0xBA |
| #define | ATTR_UNCORRECTABLE_ERRORS 0xBB |
| #define | ATTR_COMMAND_TIMEOUT 0xBC |
| #define | ATTR_COMMAND_HIGH_FLY_WRITES 0xBD |
| #define | ATTR_100_MINUS_TEMPERATURE 0xBE |
| Temperature Difference from 100: The exact specification of this attribute is not quite stable. This is what it is known as on Seagate drives whereas it is called Airflow Temperature on Western Digital hard disks. In either case this attribute usually has to do with subtracting the temperature from 100 to give a value that is worse when it is lower. | |
| #define | ATTR_GSENSE_ERROR_RATE_BF 0xBF |
| G-Sense Error Rate: Frequency of mistakes as a result of impact loads. | |
| #define | ATTR_POWER_OFF_RETRACT_COUNT 0xC0 |
| Power-off Retract Count: Number of times the heads are loaded off the media. Heads can be unloaded without actually powering off. | |
| #define | ATTR_LOAD_CYCLE_COUNT 0xC1 |
| Load/Unload Cycle: Count of load/unload cycles into head landing zone position. | |
| #define | ATTR_TEMPERATURE_C2 0xC2 |
| Temperature: Informative attribute, the raw value of which represents the current temperature in Celsius of the drive. | |
| #define | ATTR_HARDWARE_ECC_RECOVERED 0xC3 |
| Hardware ECC Recovered: Time between ECC-corrected errors. | |
| #define | ATTR_REALLOC_EVENT_COUNT 0xC4 |
| Reallocation Event Count: Represents the number of reallocation events, which have taken place. Sometimes multiple sectors are reallocated together – this corresponds to one reallocation event. (See also: Reallocated Sector Count and Current Pending Sector Count). | |
| #define | ATTR_PENDING_SECTOR_COUNT 0xC5 |
| Current Pending Sector Count: Represents the number of sectors currently pending reallocation. | |
| #define | ATTR_UNCORRECTABLE_SECTOR_COUNT 0xC6 |
| Uncorrectable Sector Count: The total number of uncorrectable errors when reading/writing a sector. | |
| #define | ATTR_ULTRADMA_CRC_ERROR_COUNT 0xC7 |
| Ultra ATA CRC Error Count: Represents the number of CRC error found in the Ultra DMA high-speed transfer mode. (CRC stands for Cyclic Redundancy Check and is data verification algorithm which uses polynomial checksums). | |
| #define | ATTR_WRITE_ERROR_COUNT 0xC8 |
| Write Error Count: Represents the rate of uncorrected write errors. Lower values indicate that there is a problem with either disk surface or read/write heads. | |
| #define | ATTR_OFF_TRACK_ERRORS 0xC9 |
| Soft Read Error Rate: Number of off-track errors. | |
| #define | ATTR_DATA_ADDRESS_MARK_ERRORS 0xCA |
| Data Address Mark errors: Number of Data Address Mark errors. | |
| #define | ATTR_ECC_ERRORS 0xCB |
| Run Out Cancel: Number of ECC errors. | |
| #define | ATTR_SOFT_ECC_CORRECTION 0xCC |
| Soft ECC Correction: Number of errors corrected by software ECC. | |
| #define | ATTR_THERMAL_ASPERITY_RATE 0xCD |
| Thermal asperity rate (TAR ): Number of thermal asperity errors. | |
| #define | ATTR_FLYING_HEIGHT 0xCE |
| Flying Height: Height of heads above the disk surface. | |
| #define | ATTR_SPIN_HIGH_CURRENT 0xCF |
| Spin High Current: Amount of high current used to spin up the drive. | |
| #define | ATTR_SPIN_BUZZ 0xD0 |
| Spin Buzz: Number of buzz routines to spin up the drive. | |
| #define | ATTR_OFFLINE_SEEK_PERFORMANCE 0xD1 |
| Offline Seek Performance: Drive’s seek performance during offline operations. | |
| #define | ATTR_VIBRATION_DURING_WRITE 0xD3 |
| #define | ATTR_SHOCK_DURING_WRITE 0xD4 |
| #define | ATTR_DISK_SHIFT 0xDC |
| Disk Shift: Distance the disk has shifted relative to the spindle (usually due to shock). | |
| #define | ATTR_GSENSE_ERROR_RATE_DD 0xDD |
| GSense Error rate: The number of errors resulting from externally-induced shock & vibration. | |
| #define | ATTR_LOADED_HOURS 0xDE |
| Loaded Hours: Time spent operating under data load (movement of magnetic head armature). | |
| #define | ATTR_LOAD_UNLOAD_RERTY_COUNT 0xDF |
| Load/Unload retry count: Number of times head changes position. | |
| #define | ATTR_LOAD_FRICTION 0xE0 |
| Load Friction: Resistance caused by friction in mechanical parts while operating. | |
| #define | ATTR_LOAD_UNLOAD_CYCLE_COUNT 0xE1 |
| Load/Unload Cycle Count: Total number of load cycles. | |
| #define | ATTR_LOAD_IN_TIME 0xE2 |
| Load 'In'-time: Total time of loading on the magnetic heads actuator (time not spent in parking area). | |
| #define | ATTR_TORQUE_AMPLIFICATION_COUNT 0xE3 |
| Torque Amplification Count: Number of attempts to compensate for platter speed variations. | |
| #define | ATTR_POWEROFF_RETRACT_CYCLE 0xE4 |
| Power off retract cycle: The number of times the magnetic armature was retracted automatically as a result of cutting power. | |
| #define | ATTR_GMR_HEAD_AMPLITUDE 0xE6 |
| GMR Head Amplitude: Amplitude of "thrashing" (distance of repetitive forward/reverse head motion). | |
| #define | ATTR_TEMPERATURE_E7 0xE7 |
| Temperature: Drive Temperature, unknown units. | |
| #define | ATTR_HEAD_FLYING_HOURS 0xF0 |
| Head Flying Hours: Time while head is positioning. | |
| #define | ATTR_TOTAL_LBAS_WRITTEN 0xF1 |
| #define | ATTR_TOTAL_LBAS_READ 0xF2 |
| #define | ATTR_READ_ERROR_RETRY_RATE 0xFA |
| Read Error Retry Rate: Number of errors while reading from a disk. | |
| #define | ATTR_FREE_FALL_PROTECTION 0xFE |
| #define ATTR_INVALID 0x0 |
| #define ATTR_READ_ERROR_RATE 0x1 |
Raw Read Error Rate: Represents the rate of uncorrected read errors. Lower values indicate that there is a problem with either disk surface or read/write heads.
| #define ATTR_THROUGHPUT_PERF 0x2 |
Throughput Performance: Represents the throughput performance of the drive, i.e. The speed at which the drive is reading and writing data.
| #define ATTR_SPIN_UP_TIME 0x3 |
Spin Up Time: Represents the average amount of time required to spin up the drive spindle to operational speed from a stopped state.
| #define ATTR_START_STOP_COUNT 0x4 |
Start/Stop Count: Represents the number of start/stop cycles for the drive. The raw value indicates the count of start/stop cycles for the drive. The drive being powered on/off or suspended/woken up are considered as start/stop cycles.
| #define ATTR_REALLOC_SECTOR_COUNT 0x5 |
Reallocated Sector Count: Represents the amount of spare sector pool available. Spare sectors are used to replace sectors that became bad for some reason (for instance, if a read error occurs). Therefore the more sectors reallocated, the worse the condition of the drive. A high value represents few reallocated sectors, a low value represents a disk in poor physical condition.
| #define ATTR_READ_CHANNEL_MARGIN 0x6 |
Read Channel Margin: Margin of a channel while reading data. The function of this attribute is not specified.
| #define ATTR_SEEK_ERROR_RATE 0x7 |
Seek Error Rate: Represents the number of seek errors. Each time the drive attempts a seek operation, but fails to position its head correctly, the seek error rate increases.
| #define ATTR_SEEK_TIME_PERF 0x8 |
Seek Time Performance: Represents how efficiently the drive is performing seek operations. A low value indicates problems with the drive subsystem, for instance the servo responsible for positioning the head.
| #define ATTR_POWER_ON_TIME 0x9 |
Power On Hours Count: This is an informative attribute, the raw value of which displays the number of hours the drive has been powered on for.
| #define ATTR_SPIN_RETRY_COUNT 0xA |
Spin Retry Count: Represents the number of times a drive fails to spin its spindle up to operation speed on the first attempt. The lower the value, the more retries have occurred.
| #define ATTR_CALIBRATION_RETRY_COUNT 0xB |
Calibration Retry Count: Calibration is the act of repositioning the drive read/write head to cylinder 0. This value represents the number of times a calibration has failed on the first attempt.
| #define ATTR_POWER_CYCLE_COUNT 0xC |
Power Cycle Count: Informative attribute, the raw value of which represents the number of drive power on/drive power off cycles for the disk.
| #define ATTR_SOFT_READ_ERROR_RATE 0xD |
Soft Read Error Rate: Uncorrected read errors reported to the operating system.
| #define ATTR_DOWNSHIFT_ERROR_COUNT 0xB7 |
| #define ATTR_END_TO_END_ERROR 0xB8 |
| #define ATTR_HEAD_STABILITY 0xB9 |
| #define ATTR_INDUCED_OP_VIB_DETECT 0xBA |
| #define ATTR_UNCORRECTABLE_ERRORS 0xBB |
| #define ATTR_COMMAND_TIMEOUT 0xBC |
| #define ATTR_COMMAND_HIGH_FLY_WRITES 0xBD |
| #define ATTR_100_MINUS_TEMPERATURE 0xBE |
Temperature Difference from 100: The exact specification of this attribute is not quite stable. This is what it is known as on Seagate drives whereas it is called Airflow Temperature on Western Digital hard disks. In either case this attribute usually has to do with subtracting the temperature from 100 to give a value that is worse when it is lower.
| #define ATTR_GSENSE_ERROR_RATE_BF 0xBF |
G-Sense Error Rate: Frequency of mistakes as a result of impact loads.
| #define ATTR_POWER_OFF_RETRACT_COUNT 0xC0 |
Power-off Retract Count: Number of times the heads are loaded off the media. Heads can be unloaded without actually powering off.
| #define ATTR_LOAD_CYCLE_COUNT 0xC1 |
Load/Unload Cycle: Count of load/unload cycles into head landing zone position.
| #define ATTR_TEMPERATURE_C2 0xC2 |
Temperature: Informative attribute, the raw value of which represents the current temperature in Celsius of the drive.
| #define ATTR_HARDWARE_ECC_RECOVERED 0xC3 |
Hardware ECC Recovered: Time between ECC-corrected errors.
| #define ATTR_REALLOC_EVENT_COUNT 0xC4 |
Reallocation Event Count: Represents the number of reallocation events, which have taken place. Sometimes multiple sectors are reallocated together – this corresponds to one reallocation event. (See also: Reallocated Sector Count and Current Pending Sector Count).
| #define ATTR_PENDING_SECTOR_COUNT 0xC5 |
Current Pending Sector Count: Represents the number of sectors currently pending reallocation.
| #define ATTR_UNCORRECTABLE_SECTOR_COUNT 0xC6 |
Uncorrectable Sector Count: The total number of uncorrectable errors when reading/writing a sector.
| #define ATTR_ULTRADMA_CRC_ERROR_COUNT 0xC7 |
Ultra ATA CRC Error Count: Represents the number of CRC error found in the Ultra DMA high-speed transfer mode. (CRC stands for Cyclic Redundancy Check and is data verification algorithm which uses polynomial checksums).
| #define ATTR_WRITE_ERROR_COUNT 0xC8 |
Write Error Count: Represents the rate of uncorrected write errors. Lower values indicate that there is a problem with either disk surface or read/write heads.
| #define ATTR_OFF_TRACK_ERRORS 0xC9 |
Soft Read Error Rate: Number of off-track errors.
| #define ATTR_DATA_ADDRESS_MARK_ERRORS 0xCA |
Data Address Mark errors: Number of Data Address Mark errors.
| #define ATTR_ECC_ERRORS 0xCB |
Run Out Cancel: Number of ECC errors.
| #define ATTR_SOFT_ECC_CORRECTION 0xCC |
Soft ECC Correction: Number of errors corrected by software ECC.
| #define ATTR_THERMAL_ASPERITY_RATE 0xCD |
Thermal asperity rate (TAR ): Number of thermal asperity errors.
| #define ATTR_FLYING_HEIGHT 0xCE |
Flying Height: Height of heads above the disk surface.
| #define ATTR_SPIN_HIGH_CURRENT 0xCF |
Spin High Current: Amount of high current used to spin up the drive.
| #define ATTR_SPIN_BUZZ 0xD0 |
Spin Buzz: Number of buzz routines to spin up the drive.
| #define ATTR_OFFLINE_SEEK_PERFORMANCE 0xD1 |
Offline Seek Performance: Drive’s seek performance during offline operations.
| #define ATTR_VIBRATION_DURING_WRITE 0xD3 |
| #define ATTR_SHOCK_DURING_WRITE 0xD4 |
| #define ATTR_DISK_SHIFT 0xDC |
Disk Shift: Distance the disk has shifted relative to the spindle (usually due to shock).
| #define ATTR_GSENSE_ERROR_RATE_DD 0xDD |
GSense Error rate: The number of errors resulting from externally-induced shock & vibration.
| #define ATTR_LOADED_HOURS 0xDE |
Loaded Hours: Time spent operating under data load (movement of magnetic head armature).
| #define ATTR_LOAD_UNLOAD_RERTY_COUNT 0xDF |
Load/Unload retry count: Number of times head changes position.
| #define ATTR_LOAD_FRICTION 0xE0 |
Load Friction: Resistance caused by friction in mechanical parts while operating.
| #define ATTR_LOAD_UNLOAD_CYCLE_COUNT 0xE1 |
Load/Unload Cycle Count: Total number of load cycles.
| #define ATTR_LOAD_IN_TIME 0xE2 |
Load 'In'-time: Total time of loading on the magnetic heads actuator (time not spent in parking area).
| #define ATTR_TORQUE_AMPLIFICATION_COUNT 0xE3 |
Torque Amplification Count: Number of attempts to compensate for platter speed variations.
| #define ATTR_POWEROFF_RETRACT_CYCLE 0xE4 |
Power off retract cycle: The number of times the magnetic armature was retracted automatically as a result of cutting power.
| #define ATTR_GMR_HEAD_AMPLITUDE 0xE6 |
GMR Head Amplitude: Amplitude of "thrashing" (distance of repetitive forward/reverse head motion).
| #define ATTR_TEMPERATURE_E7 0xE7 |
Temperature: Drive Temperature, unknown units.
| #define ATTR_HEAD_FLYING_HOURS 0xF0 |
Head Flying Hours: Time while head is positioning.
| #define ATTR_TOTAL_LBAS_WRITTEN 0xF1 |
| #define ATTR_TOTAL_LBAS_READ 0xF2 |
| #define ATTR_READ_ERROR_RETRY_RATE 0xFA |
Read Error Retry Rate: Number of errors while reading from a disk.
| #define ATTR_FREE_FALL_PROTECTION 0xFE |
