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Optional: Change RAID mode

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On some appliance models, you can change to a different RAID mode on the appliance to accommodate your storage and recovery requirements. You can only change the mode before deploying the appliance Storage Node.

If you are using ConfigBuilder to generate a JSON file, you can change the RAID mode automatically. See Automate appliance installation and configuration.

About this task

If supported by your appliance, you can choose one of the following volume configuration options:

  • Dynamic Disk Pools (DDP): This mode uses two parity drives for every eight data drives. This is the default and recommended mode for all appliances. When compared to RAID 6, DDP delivers better system performance, reduced rebuild times after drive failures, and ease of management. DDP also provides drawer loss protection in SG5760 appliances.

    Note DDP does not provide drawer loss protection in SG6060 appliances because of the two SSDs. Drawer loss protection is effective in any expansion shelves that are added to an SG6060.

  • DDP16: This mode uses two parity drives for every 16 data drives, which results in higher storage efficiency compared to DDP. When compared to RAID 6, DDP16 delivers better system performance, reduced rebuild times after drive failures, ease of management, and comparable storage efficiency. To use DDP16 mode, your configuration must contain at least 20 drives. DDP16 does not provide drawer loss protection.

  • RAID6: This mode uses two parity drives for every 16 or more data drives. It is a hardware protection scheme that uses parity stripes on each disk, and allows for two disk failures within the RAID set before any data is lost. To use RAID 6 mode, your configuration must contain at least 20 drives. Although RAID 6 can increase storage efficiency of the appliance when compared to DDP, it is not recommended for most StorageGRID environments.

Important If any volumes have already been configured or if StorageGRID was previously installed, changing the RAID mode causes the volumes to be removed and replaced. Any data on those volumes will be lost.
SG6000
Before you begin
Steps

  1. Open a browser, and enter one of the IP addresses for the appliance's compute controller.

    https://Controller_IP:8443

    Controller_IP is the IP address of the compute controller (not the storage controller) on any of the three StorageGRID networks.

    The StorageGRID Appliance Installer Home page appears.

  2. Select Advanced > RAID Mode.

  3. On the Configure RAID Mode page, select the desired RAID mode from the Mode drop-down list.

  4. Click Save.

SG5760
Before you begin

  • You have an SG5760 with 60 drives. If you have an SG5712, you must use the default DDP mode.

  • You are using any client that can connect to StorageGRID.

  • The client has a supported web browser.

Steps

  1. Using the service laptop, open a web browser and access the StorageGRID Appliance Installer:
    https://E5700SG_Controller_IP:8443

    Where E5700SG_Controller_IP is any of the IP addresses for the E5700SG controller.

  2. Select Advanced > RAID Mode.

  3. On the Configure RAID Mode page, select the desired RAID mode from the Mode drop-down list.

  4. Click Save.

Related information

NetApp E-Series Systems Documentation Site