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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
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