Quantum DLT 4700, Руководство по эксплуатации продукта

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DLT4000/DLT4500/DLT4700 Cartridge Tape Subsystem 8-1
Chapter 8
DLT4000 SCSI Interface
8.1 Overview
This chapter details the SCSI Protocol features the DLT4000 drive implements.
The following sections do not fully reiterate the ANSI SCSI messages, options and
command code specifications, but describe the supported commands, messages, and
options supported, and the error recovery procedures.
8.2 General SCSI Bus Operation
8.2.1 Data Transfer
The DLT4000 drive 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 “mini-libraries” throughout this manual.
___________________________________________________________
The DLT4000 drive 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.