Data read device, read method and circuit controlling read device
AssigneeFujitsu Limited
InventorHiroyuki Chiba
Life of this patent
Estimating the term…
Abstract
An HDC asserts the read gate of an RDC when a read head is positioned in a sector located before a sector that a hot system instructs to read data when seen from the rotation direction of a storage medium. The data that the read head has read from the sector is used to adapt a circuit that constitutes the RDC. However, the data is not transferred to the host system. Such a process is repeated until the read head reaches a position where data stored in a sector whose data has been instructed to read can be read. In this way, time needed to adapt a circuit that constitutes a read channel can be shortened.
Claims15
A read device reading data recorded on a storage medium, comprising:
- a read unit reading data stored in the storage medium;
- and
- a control unit controlling the read unit,
- said control unit controlling the read unit in such a way as to adapt a circuit that constitutes the read unit to a change in environmental temperature or degradation of a read head using data read from a second sector, instead of a first sector in the storage medium that a host system instructs to read data.
A storage device, comprising:
- a storage medium recording data;
- a read unit reading data stored in the storage medium;
- and
- a control unit controlling the read unit,
- said control unit adapting each circuit that constitutes the read unit to the change in environmental temperature or degradation of read head, using data stored in a second sector instead of a first sector that a host system instructs to read data.
An adaptation method for adapting a read unit reading data recorded in a storage medium, comprising:
- receiving an instruction to read data stored in a first sector in the storage medium from a host system;
- and
- adapting a circuit that constitutes the read unit to a change in environmental temperature or degradation of a read head using data read from a second sector instead of the first sector before reading data from the first sector.
A circuit controlling a read device reading data recorded onto a storage medium, comprising:
- a transfer unit transferring read data to a host system;
- and
- a signal output unit outputting a signal asserting a read gate of a read unit reading data,
- wherein when a read head is positioned in a location where data is stored in a second sector instead of a first sector in the storage medium that the host system instructs to read data, said signal output unit adapts a circuit that constitutes the read unit to a change in environmental temperature or degradation of a read head using data read from the second sector, and
- said transfer unit does not transfer the data read from the second data to the host system.
A read device reading data recorded on a storage medium, comprising:
- read means for reading data stored in the storage medium;
- and
- control means for controlling the read means,
- wherein said control means controls the read means in such a way as to adapt a circuit that constitutes the read means to a change in environmental temperature or degradation of a read head using data read from a second sector instead of a first sector in the storage medium that a host system instructs to read data.
Dependencies are inferred from the claim text.