Title :
Drive-level instabilities correlated to quasi-static field testing
Author :
Himle, Jenny ; Greenwell, M. Keith ; Cross, R.W.
Author_Institution :
Maxtor Corp., Longmont, CO, USA
fDate :
7/1/2001 12:00:00 AM
Abstract :
We investigated the relationship between in-drive servo error counts and drive-level quasistatic test (QST) to determine the effectiveness of using QST to screen heads which may be unstable immediately following a write operation in the drive. Waveforms, which generated servo errors, were also captured. QST did not appear to correlate well with servo errors for heads which required a write operation to cause instability. This is likely due to the transient nature of such instabilities
Keywords :
drives; giant magnetoresistance; magnetic heads; magnetoresistive devices; servomechanisms; drive-level instabilities; drive-level quasistatic test; in-drive servo error counts; quasi-static field testing; screen heads; servo errors; write operation; Current measurement; Delay effects; Electrical resistance measurement; Giant magnetoresistance; Magnetic field measurement; Magnetic heads; Probes; Servomechanisms; Stress; System testing;
Journal_Title :
Magnetics, IEEE Transactions on
