17.03.2011., četvrtak
Why IBM ThinkPad X200S notebook hard disk make noise regularly
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Many IBM ThinkPad X200S customers have consulted that why notebook hard drive make noise,and we have do a lot for that problem, in fact, this is a Hitachi hard drive protection technology, today, I received six such advice, they are all Hitachi hard drive. This is because the use of Hitachi's new drive, head homing technology, the chip will detect the hard disk head position, not homing timely, to avoid ThinkPad X200S hard disk accidental collision damage. This is not talk nonsense, but a real fact. This is IBM developed APS (Active Protection System, Active Protection System) technology, and later after the merger of Hitachi hard disk department and then adopt this technology to Hitachi's hard disk. For your reference. First, during disk operation, the head move above in the disk, read the data , when the impact force of less than 200 grams and last 2 milliseconds , generally can rely on ThinkPad own shell and shock-proof design to avoid damage to the hard drive . When the impact force for 2 milliseconds at more than 200 grams, the damage will increase with the increasing impact energy. When disk in a non-working state, the head in the stop area (Parking Zone), the largest hard disk in 1 second can withstand the impact of 800 grams; when the impact more than 800 g / ms, the damage will increase as the impact energy increased, the right of the function. That is, if head bit return to to stop the area in time, the drive can withstand even greater than the impact of working conditions and without damage. IBM APS technology is based on this principle, predicted impact may occur after the head moved and stop in the area in time to protect IBM X200S disk. According to IBM's large number of practical laboratory survey , IBM ThinkPad X200S falls case in the working condition is drop from the desktop, which dropped from 120 cm in height (usually the person's knee height of 50 cm, table height 70 cm), how can the Thinkpad head homing before the impact occurred become a key problem. Unit Hitachi took over IBM's HDD business , IBM ThinkPad X200S Battery ,some changes were made to the APS technology. Change forecast time homing into timing homing ,further strengthen the hard disk protection technology. Called the load / unload technology Introduction: "Load / unLoad" head load / unload technology enables the hard disk heads automatically go bit to rest the outer ring fixed position, Prevent disc damage from head shaking |
