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Section 4: SCSI Bridge Electronics
Read
E
ECC Rate
0.0%
Figure 48
2.4
Setting Tape Density
Tape density format can be controlled by the SCSI bridge electronics or by the NonStop server. Some
applications will not function without having software control. When the appropriate drivers exist, the latter
method is preferred, and a setting of FF should be used (default setting). When the tape drive is not busy,
you can change the tape density by pressing the mode switch. Pressing the mode switch cycles the available
density settings. The options for tape density scroll on the LCD.
DEN=CO
Rev 0096
5170
T134 ID5
CO = compression on
a
Figure 49
2.4.1
To enable compression
Press the mode switch when the LCD appears as shown in Figure 49a.
2.4.2
To disable compression
Press the mode switch when the LCD appears as shown in Figure 49b.
2.4.3
To enable host control of density
Press the mode switch when the LCD appears as shown in Figure 49c.
2.5
Setup Display Format
Configuration of the SCSI bridge electronics is accomplished using the LCD and the mode switch. All
configuration values are retained in nonvolatile memory. There are three setup menus. Setup 1 and Setup 2
contain configuration items, Setup 3 consists of diagnostic and special utilities. Enter the setup menus by
holding in the mode switch while powering up the subsystem. The menu display system forms this hierarchy:
HP StorageWorks DAT 72 (Models 5242 and 5242-ACL) User's Guide
Read
F
E
F
RWr RATE
0.0%
ECC/Rewrite percentage displays
DEN=40
Rev 0096
5170
T134 ID5
40 = compression off
b
Compression control screens
DEN=FF
Rev 0096
5170
T134 ID5
Valve should be
at FF only
c
53
HP Part Number 528296-03 July 2005
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