Fujitsu MHV2080AS manual High resistance against shock, Connection to ATA interface, Data buffer

1.1 Features

MHV2080AS]. The Sound Pressure level is 22dB [MHV2040AS]/28dB [MHV2060AS, MHV2080AS], as measured 0.3 m from the drive in Idle mode.

(4) High resistance against shock

The Load/Unload mechanism is highly resistant against non-operation shock up to 8820 m/s2 (900G).

1.1.3 Interface

(1) Connection to ATA interface

The disk drive has built-in controllers compatible with the ATA interface.

(2) Data buffer

The disk drive uses 8MB data buffer to transfer data between the host and the disk media.

In combination with the read-ahead cache system described in item (3) and the write cache described in item (7), the buffer contributes to efficient I/O processing.

(3) Read-ahead cache system

After the execution of a disk read command, the disk drive automatically reads the subsequent data block and writes it to the data buffer (read ahead operation). This cache system enables fast data access. The next disk read command would normally cause another disk access. But, if the read ahead data corresponds to the data requested by the next read command, the data in the buffer can be transferred instead.

(4) Master/slave

The disk drive can be connected to ATA interface as daisy chain configuration. Drive 0 is a master device, drive 1 is a slave device.

(5) Error correction and retry by ECC

If a recoverable error occurs, the disk drive itself attempts error recovery. The ECC has improved buffer error correction for correctable data errors.

(6) Self-diagnosis

The disk drive has a diagnostic function to check operation of the controller and disk drive. Executing a diagnostic function of the smart command invokes self-diagnosis.

(7) Write cache

When the disk drive receives a write command, the disk drive posts the command completion at completion of transferring data to the data buffer completion of writing to the disk media. This feature reduces the access time at writing.

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