Acer R910 Series manual Memory RAID, To configure memory RAID

170 Appendix B: Memory configuration options

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

1Do either option below:

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

- or -

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

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