User guide

60
Fan unit installation guide
Slot 1
Slot 2
Slot 3
Slot 4
Slot 5
Slot 6
Slot 7
Slot 8
Slot 9
Slot 10
Slot 11
Slot 12
Slot 13
Slot 14
Slot 15
Slot 16
B
A
B
B
C
C
C
C
B
A
B
B
C
C
C
C
In principle, blades are installed on slots starting from the far-left slot, although there are exceptions depending
on the number and types of blades. See the User's Guides of the blades.
With four fan units (factory default), blades in section A in the following illustration (blade slots 1 and 9) can
be cooled; with six fan units, blades in sections A and B (blade slots 1 to 4 and 9 to 12) can be cooled; with
eight fan units, blades in sections A, B, and C (all blade slots) can be cooled.
 When a N8406-019 4G FC switch (12 ports) is installed, up to eight CPU blades can be connected to the FC
switch (12 ports). These CPU blades are installed on the blade slots 1 to 8. CPU blades on the blade slots 9 to 16
cannot connect to a FC switch (12 ports).
 When a N8406-019 4G FC switch (12 ports) is installed, full-height blades can connect to the FC switch (12
port). However, there are restrictions of mezzanine slots to which the blades can connect and slot ports. For
details, see "Internal connection between CPU blades and switch modules" on page 32.
 When a CPU blade is installed on any of blade slots 5 to 8 or 13 to 16, eight fan units are required whether or
not there is CPU blade in the blade slots 1 to 4 and 9 to 12.
 When the blade enclosure has a N8406-019 4G FC switch (12 ports), four blades with Fibre channel mezzanines
on the blade slots 1 to 4, and four blades without Fibre channel mezzanines on the blade slots 9 to 12, six fan
units are required for cooling.
When an even number of fan units are installed, the redundancy mode is N+1. For example, eight fans are
installed for 16 blades. If one of the fans fails (i.e., seven fans are working) successful operation can continue.
If two of the fans fail (i.e., six fans are working), operation may stop due to a temperature abnormality detected
by a server or switch module.
If only one NEC Express5800/120Bb-m6 is installed, it will use the blade slots 1 and 2 with nothing on the blade slot 9. However,
six fan units are required because the blade slot 2 is used.
When you add a fan unit, you may have to relocate fan units that are already installed. Install fan units in the correct slots by
referring to the instructions described on previous pages.
For information on the number of slots used by blade products, see "Installable CPU blades" and the User's Guides of the blades.