Interface Implementation 13
Interface Implementation
HP Ultrium drives use SCSI-3 as the interface to connect to the host system.
This chapter gives an overview of how the interface operates.
Full details of the messages are given in Chapter 2 and of commands in
Chapter 3 and Chapter 4.
The SCSI Interface
The Small Computer System Interface (SCSI) is an industry standard, approved
by the American National Standards Institute (ANSI). You are recommended
to read the ANSI standard document in conjunction with this manual. The
ANSI specification defines the interface in general while this document
describes the HP Ultrium implementation.
The SCSI implementation provides a drive with a standard set of features and
functions. These include the following:
■ Synchronous data transfers
■ Asynchronous data transfers
■ Implementation of all mandatory and most optional commands of the
Sequential Access command set
■ LVD (Low-Voltage differential) SCSI connection
■ Ultra3 wide SCSI
■ Conformance to the following SCSI standards:
— SAM-2 T10/1157-D rev.23
— SPI-3 ANSI NCITS.336:2000
— SPC-2 ANSI NCITS.351:2001
— SSC ANSI NCITS.335:2000
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