Solusi Masalah Harddisk : Awasi Kesehatan Harddisk

Pada semua harddisk PATA maupun SATA yang ada di pasaran saat ini, sebenarnya sudah tertanam fitur SMART (Self-Monitoring Analysis and Reporting Technology) yang khusus mendeteksi kesehatan harddisk.

Di dalam SMART ada sekitar 30 parameter kesehatan harddisk, mulai dari temperatur, spin-out time, sampai seek error rate. Dari data-data inilah bisa disimpulkan apakah harddisk di PC Anda masih sehat atau sudah sakit-sakitan.

Untuk membaca data SMART ini, kita membutuhkan aplikasi khusus seperti HD Tunes. Fungsi utama aplikasi ini sebenarnya mengukur kecepatan harddisk, namun bisa untuk membaca informasi SMART juga. HD Tunes akan membaca 15 paramater SMART, dengan 3 jenis hasil, yaitu current, worst, dan threshold. Definisi masing-masing hasil itu adalah: 

Current: Keadaan harddisk Anda sekarang

Worst: angka paling kecil yang pernah ditemukan di harddisk generasi sebelumnya

Threshold: batas bawah yang menunjukkan harddisk rusak

      Data: data mentah dari sensor atau counter

Berikut ini Definisi Parameter :

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.
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.
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.

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