HP NonStop G-Series - Manual (Page 26)

Chapter Five - SCSI Bridge Electronics
This is factory-configured and is tnot selectable.
Tape
Term:On
*NOT sel
ectable*
Figure 31
Tape termination
5.11.4 Manually Selecting the Tape Density
Tape density format can be controlled by the display unit or by the NonStop server. When the
appropriate drivers exist, the latter method is generally preferred, and a setting of
FF
should be
used. Other density values shown allow the SCSI bridge electronics to control the tape density.
Density:
[FF]
PRESS if
Done
Density:
[C0]
PRESS to
Alter Density:
[00]
PRESS to
Incremnt
Density:
[00]
PRESS to
Incremnt
Density:
[F0]
PRESS to
Incremnt
Figure 32 Tape densities
5242-2SE DAT 72 Drives
C0
= Compressed mode
40
= Non compressed mode
FF
= Density controlled by the host software
Note: Once the settings have been configured through the setup menus, these settings become
the default start-up values. Density can be changed on a tape-by-tape basis any time the
tape is at BOT during normal operation. Pressing the mode switch cycles the available
density settings. Depressing the mode switch a second time selects the setting. This
setting is used until the unit is repowered or reset. The setting selected in the setup menu
is then used as the default value.
5.11.5 Setting the Error-Alert (ECC/Rewrite Percentages) Thresholds
The electronics allow you to set a numeric percentage for error-alert thresholds that cause the
amber LED (the lower LED on the units front panel) to blink when exceeded. Enter error-alert
thresholds by the Numeric Entry method. First, set the rewrite threshold followed by the ECC
threshold. Entries take the form
XX.X
, so you can enter values in the range of
00.0
percent
to
99.9
percent. Setting values less than
10.0
percent is recommended. Lower values cause
the amber LED to light or blink at a lower percentage of error occurrences. The default setting
is 10.0%.
HP StorageWorks DAT 72 (Model 5242-2SE) User's Guide
22 HP Part Number 528297-003 July 2005