Acer Altos R520 manual Installing and removing the SAS hardware RAID components

82 3 System upgrade

Installing and removing the SAS hardware RAID components

The system supports SAS hardware RAID through the active mid-plane and backplane board. The server platform supports SAS hardware RAID 0, 1, 5, 6 (when available), 10, and 50 levels. Functionality for SAS hardware RAID is enabled by using the following components:

•RAID activation key and RAID cache

The RAID activation key works in conjunction with the RAID cache to provide hardware RAID.

•RAID BBU

If power to the storage I/O processor drops below specifications, the RAID BBU maintains the contents of the DIMM by keeping the DIMM in self-refresh mode until power is restored. After power is restored, data can be safely written to drives, maintaining the integrity of the disk array.

Installing and removing the RAID activation key and RAID cache

To install the RAID activation key and RAID cache:

1Observe the ESD precautions and pre-installation instructions described on page 39.

2Remove the power distribution board cover. Perform the instructions described in “To remove a power distribution module cover” section on page 48.

3Remove the RAID activation key from its protective packaging.

4Align then insert the activation key into the RAID activation key connector on the active mid-plane board (A).

5Locate the RAID cache memory (DDR-2) slot on the active mid-plane board.