Chapter 2 - Installation
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Set Baud Rate: Enables you to set the data transmission rate of the Global Control Module’s
trace port. This function is intended for use by CEs only. The default is 38400 bits/sec.
Set Serial number: This setting enables you to alter the Global Control Module’s serial
number as stored in the unit. The Module’s robotics reports these settings in response to the
SCSI Inquiry command, in the Unit Serial Number Page.
Set Unload Mode: This setting determines whether a SCSI Move Medium command is
interpreted as implicit or explicit. If implicit, the Global Control unloads a drive before
attempting to move a cartridge from that drive. If explicit, the host must issue a SCSI Unload
command to the drive before each Move Medium command from a drive to a slot. The default
is Implicit.
Set Negotiation: This option offers two choices: Initiate Negotiation and Set Transfer Rate.
Initiate Negotiation, if set, allows the system to initiate SCSI Synchronous Negotiation with
the host (the default is No). The Global Control always responds to host-initiated negotiation.
Set Transfer Rate can be set to 10 Mbytes/sec, 5 Mbytes/sec or Asynchronous. The default is
10 Mbytes/sec.
Set Mail Slot: Some of the available host software enables the system administrator to limit
access to the library as a whole while permitting insertion into or removal from the library of
one or more tape cartridges when needed. This feature is commonly called a mail slot. It is
implemented using SCSI Import/Export elements.
Set Reserved Slots: Some host software imposes size limits on tape library magazines for
licensing purposes, and will not operate with a library that exceeds the licensed size. This
configuration option enables you to withdraw some of the slots in the Global Control Module
from use as storage slots in order to meet licensing requirements.
Set Special Configuration: This option serves multiple functions: 1) It enables you to choose
between two lengths of the Mode Sense/Select Device Capabilities Page (SCSI Page 1Fh),
which are 14 bytes and 18 bytes, to accommodate different SCSI device implementations of
this page. The default is Short. 2) It enables you to change the model number information
displayed on the initial screens. You can choose between ‘OVERLAND LX - - - - - -,’ a blank
line, ‘DIGITAL TL89X’, and a vendor unique designator. The default is ‘OVERLAND LX -
- - - -.’ 3)It enables you to specify the system’s response to the SCSI Initialize Element Status
command. The possible settings are No Inventory, Force Inventory, and Force Label Scan.
The default is No Inventory. 4) It enables you to specify the format of the Unit Attention
report. If set to All, the unit reports all unit attention conditions in sequence; if set to One, the
unit reports only the highest priority condition. 5) It enables the display of each SCSI elements
in the unit to begin with either zero or one. This affects only the front panel display, not the
actual SCSI element addresses.
Set Default: This option resets all of the preceding configuration options to their factory
defaults. Note: it does not affect the settings of the SCSI IDs of the DLT drives.
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