ON THE AIR-SLIDER BEARINGS DYNAMICS FOR PERIPHERAL DEVICES

摘要

The paper approaches an important problem in magnetic storage technology; namely, intermittent contacts between a magnetic recording slider and a hard disk. Many researches are interested in the dynamics of a hydrodynamically supported magnetic recording slider flying over a hard, rotating disk and making occasional contacts with the disk. Under steady-state conditions the slider is flying over the disk at a nominal spacing of 0.3μm. The air bearing that supports the slider is designed to prevent contacts between the slider and the disk. However, contacts between the slider and the disk are inevitable during start/stop of the disk file, when the air-bearing pressure is insufficient to support the slider completely. Contacts can also occur during track accessing or due to mechanical disturbances of the slider/disk interface. Under adverse conditions these contacts may terminate in a " head crash", a catastrophic failure of the recording system.