| 摘要 |
A disc drive is disclosed having disc files (20), a spindle motor (27), ganged read/write heads (23), an actuator in the form of a voice coil motor (VCM) (24), servo electronics (30), and a servo information sector (32) recorded on a magnetic recording data surface (26). The recorded servo information is a sequence of mini burst fields (110) interspersed between consolidated burst fields (100). The consolidated burst fields (100) include a preamble field (101), a servo address mark field (102), a digital Gray code field (103), and a series of position burst fields (104-107). The mini burst fields (110) include a preamble field (111), a sync mark field (112) half the length of the servo address mark field (102), and a series of position burst fields (113, 116) that are shorter than the position burst fields (104-107) of the consolidated burst field (100).
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