SCF Reference Manual for the Kernel Subsystem

NONE
specifies that neither TABLE nor USA66 are to be used when system time is set. This is the
default.
DESTINATION_CONTROL_TABLE { SMALL | MEDIUM }
specifies the size of the DCT limit on your system. Note that you can use DCT as the keyword
in place of DESTINATION_CONTROL_TABLE.
sets the limit to 32,767 entries.SMALL
sets the limit to 65,376 entriesMEDIUM
If you request a size decrease and the number of logical devices (ldevs) in use exceed the size
that you requested, the now out-of-range ldevs remain in use. However, future ldev allocations
are restricted to the new limit, and SCF displays this text:
DCT entries beyond the requested size (32767) are in use.
Future allocations are now limited to 32767.
NONRESIDENT_TEMPLATES [[$SYSTEM.]subvol.]filename
specifies the location of the Event Management Service (EMS) nonresident template file (file
code 839 or 844). The procedure for using this option is described under “Changing EMS
Template Files” (page 28). Changes to this attribute take effect immediately. See also the note
about changing the location of the EMS template files.
POWERFAIL_DELAY_TIME { n | RIDETHRUONLY }
specifies the maximum time, in seconds, that the operating system is allowed to wait prior to
initiating a shutdown of operations when system power failure is imminent. Changes to this
attribute take effect immediately. See also the procedure “Changing the
Power-Failure-to-Shutdown Time Interval” (page 29).
For NonStop S-Series systems, the range of n is 0 through 300 seconds. For Integrity NonStop
NS-Series systems and for Integrity NonStop BladeSystems, the range of n is 0 through 604800
seconds. 604800 seconds equals one week. For NonStop S-Series systems, NonStop NS-Series
systems and NonStop BladeSystems, the default is 30 seconds.
NOTE: For UPS-equipped NonStop NS-Series systems and NonStop BladeSystems, HP
recommends a longer time than the default of 30 seconds.
For Integrity NonStop NS-Series systems and Integrity NonStop BladeSystems, you can also
specify the key word RIDETHRUONLY as a value for this attribute. RIDETHRUONLY allows the
operating system to wait indefinitely. The maximum ride-through time for each system will vary,
depending on system load, configuration, and the Uninterruptible Power Source (UPS) capability.
NOTE: The power-monitoring capabilities of Integrity NonStop NS-series servers and Integrity
NonStop BladeSystems apply only to UPS units supplied by HP and not to site UPS units.
NonStop S-series servers, Integrity NonStop NS-Series servers, and Integrity NonStop
BladeSystems have the ability to continue to operate from a power source for some time after
the main system power has been removed. In NonStop S-series servers, this power source
consists of batteries internal to the enclosure, while in the more modular Integrity NonStop
NS-series systems and the Integrity NonStop BladeSystems, the power source consists of a UPS
to which various components are connected. You must ensure that the battery capacity for a
fully-powered system allows for at least two minutes after OSM initiates the orderly shutdown
to allow the disk cache to be flushed to nonvolatile media.
For NonStop S-Series systems, the calculated delay time should be based on the number of
internal hardware devices and I/O enclosures that must be kept operational, as well as on the
capabilities of the batteries. For Integrity NonStop NS-series systems and Integrity NonStop
BladeSystems, the delay time depends on the capacity of the UPS, the number of components
ALTER Command (Sensitive Command) 93