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UPS/400 . . . an IBM AS/400 UPS power monitoring system . . .
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A
N EXAMPLE
The following narrative describes an example of the functions performed by UPS/400 during a power loss.
The functions performed are based on the system default values carried in the System Attributes screen.
The system administrator has a UPS system for the AS/400 with a recharge time of 120 minutes. The
administrator has determined that the orderly shutdown process should take 25 minutes, broken up into 5,
five-minute intervals with immediate notification of the system operator upon detection of power loss.
Interval 1:
The system operator is notified immediately that a power loss has been detected. Active
users are likewise notified immediately with a severity level 1 message: “Attention – The
AS/400 has lost power and is running on battery backup. Be ready to sign off if the
condition is not corrected. Estimated battery life is 25 minutes.” UPS/400 performs
the process *JOBQ which holds QBATCH. A user program has been specified
(USEREXIT) that begins during interval 1.
Interval 2
: After 5 minutes the system operator is notified with a severity level 2 message: “Warning –
The AS/400 has lost power and continues to run on battery backup. Please complete
your processing as soon as possible to avoid data lost. Estimated battery life is 20
minutes.” Users are not notified at this interval nor are any process or user exits specified.
Interval 3:
After 10 minutes the system operator is notified with another severity level 2 message:
“Warning – The AS/400 has lost power and continues to run on battery backup.
Please complete your processing as soon as possible to avoid data lost. Estimated
battery life is 15 minutes.” Users are sent the same severity level 2 message as the
system operator. The process *SBS1 begins ending subsystems QSNADS and QSPL.
Interval 4
: After 15 minutes the system operator is notified with another severity level 2 message:
“Warning – The AS/400 has lost power and continues to run on battery backup.
Please complete your processing as soon as possible to avoid data lost. Estimated
battery life is 10 minutes.” Users are sent the same severity level 2 message as the
system operator. The process *INT begins, ending interactive users one at a time.
Interval 5:
After 20 minutes the system operator and users are notified with a severity level 3
message: “*** Emergency *** – Due to continued power loss on the AS/400 you are
required to immediately sign off. Estimated battery life is 5 minutes.” The process
*SBS2 begins ending subsystems QBATCH, QINTER, and QCMN.
Interval 6:
After 25 minutes UPS/400 will notify the system operator that the AS/400 is being powered
down and then power down the system.
If during the UPS/400 orderly shutdown, power had been restored the message would have been sent to
the system operator and active users: “ATTENTION: POWER RESTORED! The AS/400 has just been
switched back to regular service. System will ‘NOT’ be powered down.”
This example can be simulated in Test mode, or can be modified to specify your specific UPS shutdown
requirements, and then tested.