The SCSI interface
Interface Implementation
11
1 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
• Ultra-320 wide SCSI
• Conformance to the following SCSI standards:
• SAM-2 ANSI INCITS.366:2003
• SPI-4 ANSI INCITS.362:2002
•SPC3
• SSC-2 ANSI INCITS.380:2003
Supported messages
The following messages are supported by the drives:
• ABORT
• BUS DEVICE RESET
• COMMAND COMPLETE
