Hitachi HUS157373EL3800, HUS157336EL3600, HUS157373EL3600, HUS157336EL3800 SCSI Interface

6 SCSI Interface

6.1 Summary of SCSI Controller

The Ultrastar 15K73 SCSI controller interfaces between the drive and the host computer with the Small Computer System Interface (SCSI).

(1)ANSI standard

The controller supports the SCSI interface that conforms to the ANSI specifications shown in section 2.

(2)Compact design

The controller is embedded within the disk drive.

(3)Fast data transfer rate

The controller can transfer data via asynchronous mode, Fast-5 synchronous mode, Fast-10 synchronous mode and Ultra (Fast-20) synchronous mode.

The controller can transfer data via Ultra2 (Fast-40) synchronous mode and Ultra160 (Fast-80) synchronous mode and Ultra320 (Fast-160) synchronous mode, as well as above-mentioned transfer mode.

(4)FIFO buffer

The Ultrastar 15K73 SCSI controller has 8M bytes of FIFO buffer. This data buffering feature prevents the SCSI controller from delay during the reconnect process and reduces the latency time that is generated by the difference of the data transfer rate between media and host.

(5)Automatic error retry

The controller automatically retries whenever the disk drive encounters errors.

(6)Automatic error corrections

The controller uses 40 bytes ECC and On-The-Fly to automatically correct read errors, without latent rotational time.

(7)Parameter save feature

The controller saves the controller/device parameters (MODE SELECT parameters) specified by the host onto the disk drive. The parameters are automatically restored at power-on time.

Drawing No. Sheet No. Revision 5
K6602906	20/46	2003/6/12