Balanced Power Plan Ahead - IBM z13s Technical Manual

I/O drawer /
PCIe I/O drawer
Notes:
The numbers shown assume both BPAs feeding power with the batteries charged at full capacity.
Hold-up times are influenced by temperature, battery age, and fault conditions within the system.

10.1.4 Balanced Power Plan Ahead

A Balanced Power Plan Ahead feature is available for future growth, also assuring adequate
and balanced power for all possible configurations. With this feature, downtimes for upgrading
a system are eliminated by including the maximum power requirements in terms of Bulk
Power Regulators (BPRs) and power cords with the initial installation. The Balanced Power
Plan Ahead feature is not available with DC and 1-phase power cords.
10.1.5 Emergency power-off
On the front of the frame is an emergency power-off switch that, when activated, immediately
disconnects utility and battery power from the server. This method causes all volatile data in
the z13s servers to be lost.
If the z13s server is connected to a machine room's emergency power-off switch, and the IBF
is installed, the batteries take over if the switch is engaged. To avoid this switchover, connect
the machine room emergency power-off switch to the z13s power-off switch. Then, when the
machine room emergency power-off switch is engaged, all power is disconnected from the
power cords and the IBF. However, all volatile data in the z13s server will be lost.
Unit Emergency Power Off switch cover
z13s servers provide Unit Emergency Power Off (UEPO) switch protection from accidental
tripping. The option consists of a clear cover that can be installed into the UEPO switch
opening. The cover itself and the additional hardware that is required to install the option are
included in the z13s Shipping Group material. Determine whether you want this optional
UEPO cover installed.
10.1.6 Cooling requirements
z13s servers are air cooled. They requires chilled air, ideally coming from under a raised floor,
to fulfill the air-cooling requirements. However, a non-raised floor option is available. The
requirements for cooling are indicated in z13s Installation Manual for Physical Planning,
GC28-6953.
The front and the rear of z13s frame dissipate separate amounts of heat. Most of the heat
comes from the rear of the system. To calculate the heat output expressed in kilo British
Thermal Units (kBTU) per hour for z13s configurations, multiply the table entries from
Table 10-2 on page 372 by 3.4. The planning phase must consider correct placement of z13s
servers in relation to the cooling capabilities of the data center.
N10
(FC 1043)
1/1 9.0
0/2 N/A
1/2 N/A
N20 - one CPC drawer
(FC 1044)
minutes
6.9
6.2
4.8
Chapter 10. Environmental requirements
N20 - two CPC drawers
(FC 1045)
4.2
3.7
N/A
373