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Installing the 175 MB Cache RAID – Dual IOA Enablement card in the 8248-L4T, 8408-E8D, or 9109-RMD

Learn about installing a 175 MB Cache RAID – Dual IOA Enablement card in the 8248-L4T, 8408-E8D, or 9109-RMD system.

This feature is used to enable write cache on the two embedded SAS RAID controllers of the disk or media backplane by providing the necessary rechargeable batteries for memory backup. It also enables the two embedded SAS RAID controllers to work as dual storage IOAs, that is, high availability (HA) RAID mode. This feature plugs in to the disk or media backplane and enables a 175 MB write cache on each of the two embedded RAID controllers by providing two rechargeable batteries with associated charger circuitry. The write cache can provide additional I/O performance for attached disk or solid-state drives, particularly for RAID 5 and RAID 6. The write cache contents are mirrored for redundancy between the two RAID adapters resulting in an effective write cache size of 175 MB. The batteries provide power to maintain both copies of write-cache information in the event power is lost.

To install the 175 MB Cache RAID – Dual IOA Enablement card, complete the following steps:

  1. Remove the 175 MB Cache RAID – Dual IOA Enablement card. For instructions, see Removing the 175 MB Cache RAID – Dual IOA Enablement card from the 8248-L4T, 8408-E8D, or 9109-RMD.
  2. Locate the 175 MB Cache RAID – Dual IOA Enablement card slot (P2-C9-C1).
    Figure 1. Slot location for the 175 MB Cache RAID – Dual IOA Enablement card
    Slot location of 175 MB Cache RAID – Dual IOA Enablement card
  3. With the lever (A) in the extended position, slide the 175 MB Cache RAID – Dual IOA Enablement card into the slot as shown in Figure 2.
  4. Rotate the lever toward the enclosure to lock the card.
    Figure 2. Installing the 175 MB Cache RAID – Dual IOA Enablement card
    175 MB Cache RAID – Dual IOA Enablement card installation
  5. Install the front cover. For instructions, see Installing the front cover on the 8248-L4T, 8408-E8D, or 9109-RMD.
  6. Start the system. For instructions, see Starting a system or logical partition.
  7. Verify that the new resource is operational. For instructions, see Verifying the installed part.
Parent topic: SAS RAID enablement and cache battery pack for the 8248-L4T, 8408-E8D, or 9109-RMD

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Last updated: Mon, December 15, 2014