Memory Raid; Memory Mirroring - Intel SR6850HW4 - Server Platform - 0 MB RAM Product Manual

12. Set the Reserve Rank for Spare to "Enabled".
13. Press <F10> to save changes and exit.
14. Press "Y" at the prompt to save the changes. The server reboots to activate the changes.

Memory RAID

If the server contains four memory boards with equal memory capacity, the system can be
configured for Memory RAID. With Memory RAID, data is written normally to three of the
memory boards and the fourth is held in reserve for redundant parity information. This reduces the
total overall available memory by one-fourth. The RAID LED on the memory board will indicate
that the memory board is in a RAID configuration. Hot removal of a memory board is supported
when Memory RAID is configured.
To configure Memory RAID:
1. Boot the system to the System Options Menu.
2. Select BIOS Setup Utility.
3. Select Memory.
4. Select Configure System RAS and Performance
5. Set the Desired Memory Configuration to "RAID".
6. Select View Configuration Details.
7. Make sure Configuration Possible displays "Yes". If the option displays "No", you may need
to install more memory to meet the requirements for this configuration.
8. Press <F10> to save changes and exit.
9. Press "Y" at the prompt to save the changes. The server reboots to activate the changes.

Memory Mirroring

The memory-mirroring feature uses two or four memory boards. When configured for Memory
Mirroring, memory on one memory board is mirrored to the memory on a second memory board.
This reduces the overall available memory by half. When a memory board hardware or DIMM
error is detected on the primary memory board(s), the secondary board(s) becomes the primary
board and remains so until the failing board is replaced. Memory Mirroring uses board-level
redundancy allowing for hot-replace.
To configure Memory Mirroring:
1. Boot the system to the System Options Menu.
2. Select BIOS Setup Utility.
3. Select Memory.
4. Select Configure System RAS and Performance
5. Set the Desired Memory Configuration to "Mirror".
6. Select View Configuration Details.
7. Make sure Configuration Possible is "Yes". If the option displays "No", you may need to
install more memory to meet the requirements for this configuration.
8. Press <F10> to save changes and exit.
9. Press "Y" at the prompt to save the changes. The server reboots to activate the changes.
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