User's Guide

Installing the Autoloaders Installing the Internal Autoloader

Figure 5. DIP-Switch Settings for the Internal Autoloader

Data Compression (switches 1 and 2)

Switch 1 enables or disables hardware data compression. Switch 2 determines whether SCSI

commands can be used to enable or disable hardware data compression.

• Switch 1 ON: Hardware data compression is enabled when drive is powered on. (default)

• Switch 1 OFF: Hardware data compression is disabled when drive is powered on.

• Switch 2 ON: SCSI commands can be used to enable or disable hardware data

compression (default)

• Switch 2 OFF: SCSI commands cannot be used to enable or disable hardware data

compression

Media Recognition System (switch 3) - DDS-4 autoloader only

The Media Recognition System (MRS) allows the drive to determine whether a given tape cartridge

conforms to the DDS tape standard. Switch 3 determines how the drive works with MRS and non-

MRS media. Using non-DDS media may appear to give satisfactory results, but the inferior

specifications of such media can cause data-integrity problems.

• Switch 3 ON: Drive reads from and writes to MRS media, and reads from but does not write

to non-MRS media (default)

• Switch 3 OFF: Drive reads from and writes to both MRS and non-MRS media.

Power On Self Test Enable/Disable (switch 4)

Switch 4 enables or disables execution of Power On Self Test (POST) diagnostics when the drive is

powered on.

• Switch 4 ON: Drive performs POST when powered on. (default)

• Switch 4 OFF: Drive does not perform POST when powered on.

Data compression (DC)

SCSI DC control

Media recognition

Self Test

Wide/Narrow SCSI

Inquiry String support

Default settings shown

Operating-system

configuration

switches