4
SCSI Interface
Introduction
This chapter describes the implementation
of
the Small Computer System Interface, SCSI on
the
HP C2486A/88A/90A Disk Drives. The information includes an overview of
the
SCSI
features, options, and commands supported by these products. Any operating characteristics
relevant
to
SCSI implementation are also discussed. In this manual
the
term Target refers
to
the HP C2486A/88A/90A Disk Drives.
Table
1-1
provides a list of all the commands supported by
the
Target and identifies
which commands are
SCSI implementations and which commands are Vendor Unique
implementations.
Appendix A provides detailed descriptions of the
SCSI commands supported by
the
Target.
These descriptions are in alphabetical order and include Command Descriptor Block
(CDB)
formats,
data
formats, and all device specific information involved
in
command execution. For
further command specific details, refer
to
the ANSI SCSI Specification.
Appendix B provides descriptions of the Vendor
Unique commands supported by
the
Target.
These descriptions include Command Descriptor Block
(CDB) formats,
data
formats, and all
device specific information involved in command execution.
Supported
Functions
The Target supports
the
following:
• Command Queuing. Command queuing is supported.
• Write Cache. Write caching is supported.
• Arbitration. Full arbitration is supported.
• Disconnect.
If
allowed, the Target may disconnect after a command is received, and for any
significant delay occurring during a
data
transfer operation.
• Linked Commands. Command linking is supported.
DRAFT
SCSI
Interface 4·1
1/18/93 09:58
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