User's Manual

DLT2000/DLT2700 Cartridge Tape Subsystem 8-1
8
DLT2000 SCSI Interface
8.1 Overview
This chapter details the SCSI Protocol features the DLT2000 implements.
The following sections do not fully reiterate the ANSI SCSI specification, but describes
the supported commands, messages, and options supported, and the error recovery
procedures.
8.2 General SCSI Bus Operation
8.2.1 Data Transfer
The DLT2000 supports asynchronous and synchronous data transfers. The product has
differential and single ended versions. Odd parity is generated during all information
transfer phases where the device writes data to the SCSI bus, and checked during all
information transfer phases where data is read from the bus. Parity checking can be
disabled. Refer to Chapter 2 for details.
_________________________ Note _____________________________
The SCSI specification referrers to mini-libraries as “medium changers”
where as Quantum uses the term “min-libraries” throughout this manual.
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The DLT2000 supports a maximum block size of 1 Byte to 16 MBytes.
Disconnects from the SCSI bus will be done at regular intervals during a data transfer.
This allows other devices to access the bus. This disconnecting is configurable by use
of the Disconnect-Reconnect Mode Parameters page.