Reserved Sb - Fujitsu PRIMEQUEST 2000 Series Administration Manual

CHAPTER 3 Component Configuration and Replacement (Add, Remove)
3.2 High availability configuration
- In SB hot add, SB hot remove, IOU hot add or IOU hot remove operation, multiple SBs or multiple IOUs
cannot be specified at the same time. If you perform hot add or hotremove of multiple SBs or multiple
IOUs, perform the DR operation of each device one by one.
- Hot add, hot remove, or hot replace of an IOU which is connected a DU cannot be performed.
- Hot add, hot remove or hot replace of an IOU which is connected a PCI_Box cannot be performed.
- Legacy OS cannot be started up since a partition with DR mode enabled forcibly starts up in UEFI mode.
If you start up Legacy OS, disable DR mode.
- Do not enable DR function and TXT/TPM function together.
- Do not perform DR operation to a component mounting dump device or a component which is connected
to dump device.
- After SB hotadd, reboot from the operating system and reset by MMB Web-UI may become Power Cycle
only once.
- Do not perform operation of video redirection during DR operation.
- If you use DR function on RHEL 6.4, below errata must be adopted:
Advisory number is RHSA-2013:1051-1 or later.
(https://rhn.redhat.com/errata/RHSA-2013-1051.html%22)

3.2.2 Reserved SB

In the Reserved SB function, a spare SB is mounted in the chassis in advance, the faulty SB is automatically
disconnected, the spare SB is incorporated and the partition is restarted. The spare SB intended for switching
when there is a fault is called the Reserved SB. All models in the PRIMEQUEST2000 series support the
Reserved SB function.
Using a Reserved SB function has the following advantages when a hardware error occurs in the SB.
- Quick recovery is possible without reduction in SB resources.
- In a partition with one SB, recovery is possible even if the SB fails (SB degradation)
In addition, in the 2000 series PRIMEQUEST Series, SB in a running partition can be also specified as a
Reserved SB. A Reserved SB can be used very effectively by using this function.
An SB in a running partition can be also used as a Reserved SB. In this case, the SB will be referred to as
Active Reserved SB.
The example below shows the operation wherein the SB of a partition in the test system being used as a
Reserved SB.
If there is an SB failure in a partition of the production system, the firmware issues a shutdown instruction to
the partition of the test system. After the shutdown is completed, the partition is incorporated as the SB of the
production system. However, this setting is applicable only if the shutdown time of the test system can be
permitted.
FIGURE 3.19 Example of operation of a partition of a test system using the SB as a Reserved SB
(1)
(2)
(3)
Remarks
No.
Production system
Test system
Partition #1 is shutdown
Description
36
C122-E175-02EN