ZyXEL Communications NAS320 User Manual page 283

Table 93 S.M.A.R.T. Attributes (continued)
ATTRIBUTE
ID
NAME
220 Disk Shift
221 G-Sense Error
Rate
222 Loaded Hours
223 Load/Unload
Retry Count
224 Load Friction
225 Load/Unload
Cycle Count
226 Load 'In'-time
227 Torque
Amplification
Count
228 Power-Off
Retract Cycle
230 GMR Head
Amplitude
231 Temperature
240 Head Flying
Hours
250 Read Error Retry
Rate
Media Server User's Guide
BETTER DESCRIPTION
Low This is how far the disk has moved relative to the spindle (this kind of
shift is usually due to shock).
Low This is the number of errors that have resulted from external vibration
and shock.
This is how long the hard drive has operated under data load (this
requires movement of the magnetic head armature).
This is how many time the magnetic head has changed position.
Low This is resistance caused by friction in mechanical parts during operation.
Low This is the total number of load cycles.
This is the total time that the magnetic heads actuator has had a load
(not been in the parking area).
Low This is the number of attempts to compensate for variations in platter
speed.
Low This is how many times the magnetic armature was automatically
retracted because the power was cut.
This is the amplitude of thrashing (or the distance of repetitive forward
and reverse head motion).
Low This is the hard drive's temperature.
This is the total time that the head has been positioning.
Low This is the number of errors in reading from the disk.
Chapter 11 Packages
283