Chapter 10 Package Management
Table 81 S.M.A.R.T. Attributes (continued)
ID | ATTRIBUTE | BETTE | DESCRIPTION | |
NAME | R | |||
|
| |||
20 | Thermal | Low | This is the number of thermal asperity errors. Thermal | |
5 | Asperity Rate |
| asperity is a read signal spike caused by sensor | |
| (TAR) |
| temperature rise due to touching the disk surface or | |
|
|
| contaminant particles. | |
|
|
|
| |
20 | Flying Height |
| This is the height of the hard drive’s read/write heads | |
6 |
|
| above the disk surface. | |
|
|
|
| |
20 | Spin High |
| This is the quantity of high current used to spin up the | |
7 | Current |
| drive. | |
|
|
|
| |
20 | Spin Buzz |
| This is the number of buzz routines to spin up the drive. | |
8 |
|
| When the arm holding the read/write heads is stuck, the | |
|
|
| motor driving it tries to oscillate the arm to free it. This | |
|
|
| causes an audible vibration. | |
|
|
|
| |
20 | Offline Seek |
| This is the hard drive’s seek performance during offline | |
9 | Performance |
| operations. Offline operations are tests the drive does | |
|
|
| itself as opposed to those that an external diagnostic tool | |
|
|
| has it do. Seek performance is how quickly the drive | |
|
|
| moves from track to track. | |
|
|
|
| |
22 | Disk Shift | Low | This is how far the disk has moved relative to the spindle | |
0 |
|
| (this kind of shift is usually due to shock). | |
|
|
|
| |
22 | Low | This is the number of errors that have resulted from | ||
1 | Rate |
| external vibration and shock. | |
|
|
|
| |
22 | Loaded Hours |
| This is how long the hard drive has operated under data | |
2 |
|
| load (this requires movement of the magnetic head | |
|
|
| armature). | |
|
|
|
| |
22 | Load/Unload |
| This is how many time the magnetic head has changed | |
3 | Retry Count |
| position. | |
|
|
|
| |
22 | Load Friction | Low | This is resistance caused by friction in mechanical parts | |
4 |
|
| during operation. | |
|
|
|
| |
22 | Load/Unload | Low | This is the total number of load cycles. | |
5 | Cycle Count |
|
| |
|
|
|
| |
22 | Load |
| This is the total time that the magnetic heads actuator | |
6 |
|
| has had a load (not been in the parking area). | |
|
|
|
| |
22 | Torque | Low | This is the number of attempts to compensate for | |
7 | Amplification |
| variations in platter speed. | |
| Count |
|
| |
|
|
|
| |
22 | Low | This is how many times the magnetic armature was | ||
8 | Retract Cycle |
| automatically retracted because the power was cut. | |
|
|
|
| |
23 | GMR Head |
| This is the amplitude of thrashing (or the distance of | |
0 | Amplitude |
| repetitive forward and reverse head motion). | |
|
|
|
| |
23 | Temperature | Low | This is the hard drive’s temperature. | |
1 |
|
|
| |
|
|
|
| |
24 | Head Flying |
| This is the total time that the head has been positioning. | |
0 | Hours |
|
| |
|
|
|
| |
25 | Read Error | Low | This is the number of errors in reading from the disk. | |
0 | Retry Rate |
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284 |
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NSA320 User’s Guide |
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