Acer Altos R910 Series User's Manual | Page 180

Acer Servers User's Manual - Altos R910 Series.
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 Appendix B: Memory configuration options

170

Memory RAID 

If four memory boards with equal memory capacity are installed on the 
server, the system can be configured for Memory RAID. Memory RAID 
mode acts similar to RAID level 4, where data is written to three of the 
memory boards and the fourth is held in reserve for memory parity 
information. 

When one board fails, the memory subsystem operates in non-
redundant mode. The data from the remaining three boards is used to 
reconstruct the data that was on the failed memory board. When the 
failed memory board location is hot-replace, the BIOS rebuilds the 
RAID by reconstructing the data that was on the previously failed 
memory board and writes the data to the newly installed board. When 
the rebuild is complete, the system is once again in redundant mode. 
The BIOS sets the memory board RAID LED to indicate that the memory 
board is operating in the memory RAID mode. 

To configure memory RAID 

1

Do either option below:

Run BIOS setup. See “Entering BIOS setup” on page 96.

- or -

a

During system bootup, enter the System Options Menu. See 
“System options menu” on page 90. 

b

Use the up and down arrow keys to select BIOS Setup Utility
then press Enter. The BIOS main menu displays on the monitor. 

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