| 摘要 |
Hard disk testing apparatus and method having a plurality of heads mounted on a carriage capable of moving in the direction of a hard disc at intervals defined by dividing the radius of the hard disc, write circuit for writing a test signal through the heads in the hard disc, read circuit for reading a signal written through the heads, and measuring function for measuring a separation between one head of the heads and another head of the heads provided adjacent to the one head based on a shift distance of the another head shifted to read a signal written by the one head. A separation of the heads is accurately measured without a measuring device, and micro adjustment of positions of the heads based on the measured separation is not required. The possibility of double testing of or failure in testing tracks on the border is eliminated, and thereby disc test is efficiently performed.
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