Abstract
High-speed massive imaging of hard disk data by using the spin-stand imaging technique [I. D. Mayergoyz, C. Serpico, C. Krafft, and C. Tse, J. Appl. Phys. 87, 6824 (2000) and I. D. Mayergoyz, C. Tse, C. Krafft, and R. D. Gomez, J. Appl. Phys. 89, 6772 (2001)] is reported. In order to obtain these large-scale images of hard disk data, disks from commercial hard drives were scanned by a giant magnetoresistive head in the along- and cross-track directions. A special method of triggering has been devised to capture the data nondestructively. Challenges related to the eccentricity of the disk and the instability of the trigger have also been addressed. By using this massive imaging technique, we were able to image disk data with track densities as high as 60 000 tracks per inch. With a specially designed automated algorithm, the developed technique can be programmed to image the drive data of the whole disk surface with high resolution and speed.
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