Descriptions of configuration options, Set data format, Set scsi – HP NonStop G-Series User Manual
Page 48: Set library mode, Set element base
Installing and Configuring the 5257ACL Tape Drive
5 -6
Descriptions of Configuration Options
Descriptions of Configuration Options
The items available on the Configuration menu are described next.
Set Data Format
Use this setting to set the data format and enable or disable data compression. The data
format options are: Auto Selection, THZ01, THZ02, DLT2000, DLT2000XT, DLT4000,
or DLT7000. Compression cannot be enabled when either the THZ01 or THZ02 format
is used. This setting applies to the next or the currently loaded cartridge only. An unload
command returns to the default. This setting does not display the format of the loaded
tape; use the Show Status menu for this purpose. Default is Auto Selection for both
density and compression.
Set SCSI
Use this setting to enable or disable the robotics SCSI bus parity checking and set the
SCSI addresses of the drives and the robotics. The defaults are: parity on; DLT 1 Bus ID
= 5; Library Bus ID = 3.
Set Library Mode
Use this setting to set the robotics operating mode to Random or Sequential DLT1.
Random mode provides complete NonStop Himalaya control of the robotics; sequential
modes are locally controlled. Sequential DLT1 begins with any cartridge loaded into
DLT1. The 5257ACL monitors the status of DLT1, and when the cartridge is unloaded
by the NonStop Himalaya, it loads the next cartridge in magazine numerical order. This
operation continues to cycle until all of the cartridges have been loaded, or until an
empty slot is encountered. The default is Sequential.
When Sequential DLT1 is selected, an additional Sequential mode option appears that
lets you select Normal or Recirculate options. Normal option operates as described
above. In Recirculate mode, instead of stopping after the NonStop Himalaya has
unloaded the cartridge in the last slot, the operation continues by loading the cartridge in
Slot 1. Recirculation continues until an empty slot is encountered. The default for
Sequential mode is Normal.
Set Element Base
Use this setting to set the base addresses of each of the three SCSI Elements of the
module. To identify sources and destinations in SCSI commands to the robotics, the
5257ACL is divided into elements, each of which is assigned a separate designator or
Element Address. The Transport Element is the robotics mechanism itself; the
Storage Elements are the ten slots in the magazine; the Transfer Element is the drive.
The 5257ACL reports these settings in response to the SCSI Mode Sense command in
the Element Address Assignment Page. The defaults are Transport = 0000; Storage
element base = 0001; Transfer element base = 00F0 (DLT 1).