Hitachi CinemaStar P7K500 Specifications page 32

5.2.2.1
Write DRQ interval time
For write sectors and write multiple operations 3.8 μs is inserted from the end of negation of the DRQ bit until
setting of the next DRQ bit.
5.2.2.2
Read DRQ interval time
For read sectors and read multiple operations the interval from the end of negation of the DRQ bit until
setting of the next DRQ bit is as follows:
In the event that a host reads the status register only before the sector or block transfer DRQ
interval, the DRQ interval 4.2 μs
In the event that a host reads the status register after or both before and after the sector or block
transfer, the DRQ interval is 11.5 μs
HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1)
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