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CHAPTER 3 Component Configuration and Replacement (Add, Remove)
3.2 High availability configuration
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C122-E175-01EN
- When using the Trusted Platform Module (TPM) function, the Reserved SB function cannot be used.
- Do not set a Reserved SB for a partition where the HDD/SSD on the SB is used as a boot disk or data
disk.
- When simultaneously using the Software RAID and the Reserved SB function, do not configure the
HDD/SSD Mirror in the SB.
Home SB switching method
When the Home SB fails, the method of taking over the information of the various settings when switching to
Reserved SB is as follows.
Note
License authentication may be prompted after the switch to the Reserved SB, when using the volume license
or package product, and the SB purchased at the same time as the enable kit is not being used.
TABLE 3.5 Operational restrictions when switching to a Reserved SB
Item
Operational restrictions
USB port
When connected to a USB port, the connection to the USB port of the Reserved SB must
be changed manually after the switching.
VGA port
When connected to a VGA port, the connection to the VGA port of the Reserved SB must
be changed manually after the switching.
Time setting
If the NTP is not used, operating system time must be verified and set, as there may be a
time difference time after the switching.
Remarks
License authentication may be prompted after switching to a Reserved SB in the following cases.
- -When using a volume license or package product
- When using an SB purchased together with the enable kit
For details, see License Authentication with SB and Enable kit Combinations in 3.4 Expansion of components.
3.2.3 Memory Operation Mode
The Memory Operation Mode can be set from the MMB Web-UI for each PPAR partition. The following five
modes are supported as Memory Operation Modes.
- Performance Mode
- Normal Mode
- Partial Mirror Mode
- Full Mirror Mode
- Spare Mode
The default is Normal Mode.
The overview of each mode is given the TABLE below.
TABLE 3.6 Overview of Memory Operation Modes
Memory Operation Mode
Description
Performance Mode
Mode that elicits the maximum memory performance.
However, it does not support any RAS function except the SDDC.
Normal Mode
Mode in which the Memory Mirror and Memory Spare are used. DDDC is
supported as a memory RAS function in addition to SDDC.
Mode which is set as the default.
Full Mirror Mode
Mode in which the Memory Mirror is used in all the SBs included in a partition.
In this mode, mirror maintenance mode or the capacity maintenance mode is
selected as the Memory Mirror RAS mode.
For details on the Memory Mirror, see 3.2.4 Memory Mirror.
For details on the Memory Mirror RAS, see Memory Mirror RAS of 3.2.4
Memory Mirror.
Partial Mirror Mode
The Memory Mirror mode is used only in the Home SB.
In this mode, mirror maintenance mode or capacity maintenance mode is
selected as the Memory Mirror RAS mode.
For details on the Memory Mirror, see 3.2.4 Memory Mirror.
For details on the Memory Mirror RAS, see Memory Mirror RAS of 3.2.4