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Interpretation of S.M.A.R.T. Attributes

Device Model	Attributes ID#	Attributes Name	Description
	1	Raw Read Error Rate	Frequency of errors while reading raw data from a disk.
	2	Throughput Performance	Average efficiency of a hard disk.
	3	Spin Up Time	Time needed by spindle to spin-up.
	4	Start/Stop Count	Number of start/stop cycles of spindle.
	5	Reallocated Sector Count	Quantity of remapped sectors.
	6	Start/Stop Count	Number of start/stop cycles of spindle.
	7	Seek Error Rate	Frequency of errors appearance while positioning.
	8	Seek Time Performance	The average efficiency of operations while positioning.
	9	Power-On Hours Count	Quantity of elapsed hours in the switched-on state.
	10	Spin-up Retry Count	Number of retry attempts, that were needed to reach the operational speed of the spindle.
	11	Calibration Retry Count	Number of attempts to calibrate a drive.
	12	Power Cycle Count	Number of complete power on/off cycles of hard disk.
<unknown>	13	Soft Read Error Rate	Frequency of program errors appearance while reading data from a disk.
<unknown>	191	G-Sense Error Rate	Frequency of mistakes as a result of impact loads as detected by a shock sensor(?).
<unknown>	192	Power-Off Retract Cycle	Number of power-off cycles (Fujitsu: Emergency Retract Cycle Count).
<unknown>	193	Load/Unload Cycle Count	Number of cycles into Landing Zone position.
	194	HDA Temperature	Temperature of a Hard Disk Assembly.
	195	Hardware ECC Recovered	Frequency of the on the fly errors (Fujitsu: ECC On The Fly Count).
	196	Reallocated Event Count	Number of remap operations. That means replacing a bad sector by one from the spare area.
	197	Current Pending Sector Count	Current number of unstable sectors (waiting for remapping).
	198	Offline Scan Uncorrectable Count	Number of uncorrected errors.
	199	UltraDMA CRC Error Rate	Total number of errors CRC during UltraDMA mode.
<unknown>	200	Write Error Rate	Number of errors while writing to disk (or) flying height (?) (Western Digital: Multi Zone Error Rate).
<unknown>	201	Soft Read Error Rate	Frequency of program errors appearance while reading data from a disk.
	202	Data Address Mark Errors	Number of Data Address Mark (DAM) errors (or) vendor-specific.
	203	Run Out Cancel	Number of the ECC errors (Maxtor: ECC Errors).
	204	Soft ECC Correction	Quantity of errors corrected by software ECC.
	205	Thermal Asperity Rate (TAR)	Frequency of the thermal asperity errors.
	206	Flying Height	The height of the disk heads above the disk surface.
	207	Spin High Current	Amount of high current used to spin up the drive.
	208	Spin Buzz	Number of buzz routines to spin up the drive.
	209	Offline Seek Performance	Drive's seek performance during offline operations. (Relation to Seek Time Performance - #8?)
	220	Disk Shift	Shift of disk is possible as a result of strong shock loading in the store, as a result of it's falling or for other reasons (sometimes: Temperature)
<unknown>	221	G-Sense Error Rate	Frequency of mistakes as a result of impact loads as detected by a shock sensor(?).
	222	Loaded Hours	Number of hours in general operational state.
	223	Load/Unload Retry Count	Loading on drive caused by numerous recurrences of operations, like reading, recording, positioning of heads, etc.
	224	Load Friction	Load on drive caused by friction in mechanical parts of the store.
<unknown>	225	Load/Unload Cycle Count	Number of cycles into Landing Zone position.
	226	Load-in Time	General time of loading for drive.
	227	Torque Amplification Count	Quantity efforts of the rotating moment of a drive.
<unknown>	228	Power-Off Retract Cycle	Number of power-off cycles (Fujitsu: Emergency Retract Cycle Count).
	230	GMR Head Amplitude	Amplitude of heads trembling (GMR-head) in running mode.
<unknown>	231	Temperature	Temperature of a drive.
	240	Head Flying Hours	Time while head is positioning.
	250	Read Error Retry Rate	Number of errors while reading from a disk.