CLOCK ACCURACY DETERMINING METHOD AND CLOCK ACCURACY DETERMINING DEVICE

摘要

According to one embodiment, when a timing error between a signal read back from a multi-spiral pattern pre-recorded on a magnetic disc and an SSW clock generated at a read/write channel is set as an SSW clock following error, SSW clock accuracy is determined based on results of comparison between SSW clock following errors read from two different points in each of spiral patterns constituting the multi-spiral pattern.

主权项

1. A clock accuracy determining method comprising:
reading back a signal from a multi-spiral pattern pre-recorded on a magnetic disc; generating an SSW clock at a read/write channel; and determining SSW clock accuracy based on results of comparison between SSW clock following errors read from two different points in each of spiral patterns constituting the multi-spiral pattern, when timing error between the read back signal and the SSW clock is set as one of the SSW clock following errors.