NEC SigmaBlade B140a-T Guia do Utilizador descarregar pdf (Página 284)

9-20 Upgrading Your Server

Online Spare Memory

The CPU blade supports the online spare memory feature.

To use this feature, install the standby DIMMs as spare, then select the supported feature from the

BIOS SETUP.

 To enable the online spare memory feature:

The online spare memory feature puts a memory group into standby status as spare

memory. If an unrecoverable error occurs in a DIMM of the running group, the feature

automatically copies the contents of the DIMM to the standby one, and changes the

running group from the failed one to a standby one to continue the processing.

To enable the online spare memory feature, additionally install DIMMs according to

procedures in "Installation" described earlier. The feature requires 8, 12, or 16 DIMMs of

same capacity. The running group and the standby group are determined according to the

DIMM installation status.

The table below shows examples of DIMM installation patterns.

DIMM

#01, #02

DIMM

#03, #04

DIMM

#05, #06

DIMM

#07, #08

DIMM

#09, #10

DIMM

#11, #12

DIMM

#13, #14

DIMM

#15, #16

1GB

(512MB×2)

1GB

(512MB×2)

1GB

(512MB×2)

1GB

(512MB×2)

––––

2GB (1GB×2) 2GB (1GB×2) 2GB (1GB×2) 2GB (1GB×2) – – – –

4GB (2GB×2) 4GB (2GB×2) 4GB (2GB×2) 4GB (2GB×2) 4GB (2GB×2) 4GB (2GB×2) – –

8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2) 8GB (4GB×2)

IMPORTANT: To use the feature, DIMMs must be installed

according to the predefined condition. If the installed DIMMs do not

satisfy the condition, a POST error will occur.

 Parameters in BIOS SETUP

Run BIOS SETUP (see Chapter 4), select [Advanced] - [Memory Configuration] - [Online

Spare Memory], and change parameter to [Enabled]. The factory-set value for this

parameter is [Disabled].

 Others

– The memory capacity indicated by operating system is as follows:

Total physical capacity of memory installed – Capacity of standby memory

NOTE: If the online spare memory feature is used with four sets of 1-

GB DIMM (eight 512MB DIMMs), the operating system only

recognizes a half of the total physical capacity.

– Enabling the online spare memory feature does not affect the operation of application

program.

– The feature is automatically disabled if the following error message is displayed on

POST.

8200: Online Spare Memory was not ready.

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