HP Surestore Tape Library Model 10/180 HP Surestore Bridge FC 2/1 LV and FC 4/ - Page 171

needs to be disabled for the reasons described earlier.

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Figure 73 1. Set the static kernel tunable parameter st_ats_enabled to OFF (0). This can be done from the Kernel Configuration window of HP-UX system administration tool (SAM) shown in Figure 73 and requires a kernel rebuild and system reboot. When this parameter is enabled an implicit SCSI reserve and release is performed during the open and close sequence in the tape driver. This default was originally designed for ATS services with MC/ServiceGuard. For SAN configurations, this parameter needs to be disabled for the reasons described earlier. Configurable Parameters Screen Chapter 7 Note When MC/ServiceGuard is enabled for ATS, the ATS services provide a mechanism for automatically cleaning up reservations from a second host. Chapter 7 HP-UX Configuration 173

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Chapter 7
HP-UX Configuration
173
Chapter 7
1.
Set the static kernel tunable parameter
st_ats_enabled
to
OFF
(
0
).
This can be done from the Kernel Configuration window of HP-UX system
administration tool (SAM) shown in
Figure 73
and requires a kernel
rebuild and system reboot. When this parameter is enabled an implicit
SCSI reserve and release is performed during the open and close
sequence in the tape driver. This default was originally designed for ATS
services with MC/ServiceGuard. For SAN configurations, this parameter
needs to be disabled for the reasons described earlier.
Figure 73
Configurable Parameters Screen
Note
When MC/ServiceGuard is enabled for ATS, the ATS services
provide a mechanism for automatically cleaning up reservations
from a second host.