SCF Reference Manual for the Kernel Subsystem

connected to it (for example, the CPU module, p-switches and disk drive enclosures), and the
thermal attributes of the room.
After a power failure, if the system power has not been restored for some time, the operating
system shuts down all system operations in an orderly manner. This is essential to ensure a
successful recovery from the power failure.
The actual time the operating system can wait before shutdown is calculated at the time of the
power failure. In NonStop S-Series systems, the operating system uses the smaller of the
calculated time value and the POWERFAIL_DELAY_TIME value to determine how long it waits
before starting to shut down system operations. On Integrity NonStop NS-series servers and
Integrity NonStop BladeSystems, the operating system uses the value that the operator specifies
as the POWERFAIL_DELAY_TIME value.
You must take care when configuring the POWERFAIL_DELAY_TIME attribute. The operating
system continues to process data until n seconds expires. Unexpected errors might occur if
peripherals used by the system (for example, modems, Ethernet hubs and routers, and tape
drives not contained within a system enclosure) are not powered by uninterruptible power
supplies (UPSs) during this time.
Refer to the planning guides for the various systems for more information: NonStop S-Series
Planning and Configuration Guide, the appropriate NonStop NS-series planning guide, or the
NonStop BladeSystem Planning Guide.
RESIDENT_TEMPLATES [[$SYSTEM.]subvol.]filename
specifies the location of the Event Management Service (EMS) resident 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.
NOTE: If you change the location of the EMS template files using the ALTER command, the
INSTALL^TEMPLATES program permanently changes the location of the EMS template files.
As a result, when you next run DSM/SCM, even though the Build and Apply creates new EMS
templates, the subsequent system load invokes the EMS templates previously specified to the
INSTALL^TEMPLATES program. To use the RTMPLATE and TEMPLATE EMS template files installed
in the new SYSnn by DSM/SCM, you must use this ALTER command:
-> ALTER, RESIDENT_TEMPLATES $SYSTEM.SYSTEM.RTEMPLATE, &
NONRESIDENT_TEMPLATES $SYSTEM.SYSTEM.TMPLATE
SYSTEM_NAME \sysname
specifies the name of the system in an Expand network. Each Expand system name must be
unique within the network. The first character is alphabetic; the following six characters are
alphanumeric. The default is \NONAME.
For more information, see the NonStop S-Series Hardware Installation and FastPath Guide, the
appropriate NonStop NS-series hardware installation guide, or the NonStop BladeSystem
Hardware Installation Manual. Changes to this attribute take effect at the next Manual Reload
or Hard Reset of the system.
SYSTEM_NUMBER n
specifies the node number of the system in an Expand network. Each Expand node number
must be unique within the network. The range is 0 through 254. The default is 254.
For more information, see the NonStop S-Series Hardware Installation and FastPath Guide, the
appropriate NonStop NS-series hardware installation guide, or the NonStop BladeSystem
Hardware Installation Manual. Changes to this attribute take effect at the next Manual Reload
or Hard Reset of the system.
94 SCF Commands for the Kernel Subsystem