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Huawei V2 and V3 Server RAID Controller Card User Guide 36

This document describes the appearances and features of the redundant array of independent disks (RAID) controller cards, how to configure properties for the RAID controller cards, and how to install drivers. The RAID controller cards include the LSI SAS2208, LSI SAS2308, LSI SAS3008, LSI SAS3108, LSI SoftRAID, PM8060, and PM8068.
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Managing CacheCade

Managing CacheCade

A special RAID key enables CacheCade to expand the read caching capacity and introduce write caching. Use SSDs to create a CacheCade-dedicated RAID array to function as level-2 cache and provide better I/O performance for the existing RAID array.

Creating a CacheCade Virtual Drive

Scenarios

If a CacheCade RAID key is configured for the LSI SAS3108, you can create a CacheCade virtual drive on the Configuration Utility. The CacheCade virtual drive serves as level-2 cache for the existing RAID.

Procedure

  1. Access the Configuration Utility main screen. For details, see Logging In to the Configuration Utility.
  2. Check that the RAID key is activated.

    1. On the VD Mgmt screen, select SAS3108 and press F2.
    2. On the controller operation menu, select Advanced Software Options and press Enter.

      The advanced controller properties screen is displayed. If MegaRAID CacheCade Pro 2.0 exists and its status is Unlimited, the CacheCade RAID key has been activated.

      Figure 8-71 Advanced Software Options screen
    3. Select Cancel to return to the main screen.

  3. Check that at least one idle SSD is available.

    On the PD Mgmt screen, check that at least one idle SSD is available.

  4. Create a CacheCade virtual drive.

    1. On the VD Mgmt screen, select SAS3108 and press F2.
    2. Select Create CacheCade Virtual Drive and press Enter.

      The Create CacheCade Virtual Drive screen is displayed, as shown in Figure 8-72. Table 8-30 describes the parameters on the screen.

      Figure 8-72 Create CacheCade Virtual Drive screen
      Table 8-30 Parameter description

      Parameter

      Description

      Name

      User-defined name of the CacheCade virtual drive.

      Size

      Capacity of the CacheCade virtual drive. This parameter is determined by the selected SSD.

      RAID Level

      RAID level (RAID 0 or RAID 1) of the CacheCade virtual drive.

      Write Policy

      Read/write policy of the CacheCade virtual drive.

      • Write Back: Once all data in the cache is received, the controller card notifies the host that data transmission is complete.
      • Write Through: Once the drive subsystem receives all data, the controller card notifies the host that data transmission is complete.
    3. Set the name, RAID level, and read/write policy of the CacheCade virtual drive based on Table 8-30.
    4. Under Select SSD, select the SSDs to be added to the CacheCade virtual drive, and press Enter.

      If [X] is displayed before an SSD, the SSD is selected.

    5. Select OK and press Enter.

      The message "The CacheCade Virtual Drive is successfully" created is displayed.

Enabling SSD Caching for a Common Virtual Disk

Scenarios

You can enable SSD caching for a common virtual drive in any of the following ways:

  • If a CacheCade RAID key is configured, the Configuration Utility asks you whether to enable SSD Caching during the creation of a common virtual drive.
  • If a CacheCade RAID key is configured, you can modify the common virtual drive properties to enable SSD caching.
  • After a common virtual drive is created, you can enable SSD caching for it on the Manage SSD Caching screen.

Procedure

  1. Access the Configuration Utility main screen. For details, see Logging In to the Configuration Utility.
  2. On the VD Mgmt screen, select SAS3108 and press F2.
  3. Select Manage SSD Caching and press Enter.

    The Manage SSD Caching screen is displayed, as shown in Figure 8-73.

    The list under Virtual Drives shows the virtual drives for which you can enable SSD caching.

    Figure 8-73 Manage SSD Caching screen

  4. Select the desired virtual drive and press Enter.

    If [X] is displayed before a virtual drive, the virtual drive is selected.

  5. Select OK and press Enter.

    The VD Mgmt screen is displayed.

Deleting a CacheCade Virtual Drive

  • If the CacheCade has been associated with a virtual drive, remove the association between the CacheCade and the virtual drive before you delete the virtual drive. If the CacheCade is not associated with any virtual drive, perform 2.
  • To prevent data loss, do not perform offline operations on the drives in the CacheCade virtual drive.

Procedure

  1. Remove the association between the CacheCade and the virtual drive.

    1. On the VD Mgmt screen, select SAS3108 and press F2. The screen shown in Figure 8-74 is displayed.
      Figure 8-74 VD Mgmt screen
    2. Select Manage SSD Caching and press Enter.

      The Manage SSD Caching screen is displayed, showing the virtual drives associated with the CacheCade, as shown in Figure 8-75.

      Figure 8-75 Manage SSD Caching
    3. Select the virtual drive and press Enter to clear X, as shown in Figure 8-76.
      Figure 8-76 Removing the association between the CacheCade and virtual drives

      If multiple virtual drives are associated with the CacheCade, remove the association between the CacheCade and each virtual drive in the same way.

    4. Select OK and press Enter.

      After the association is removed, the VD Mgmt screen is displayed.

  2. Delete the CacheCade virtual drive.

    1. On the VD Mgmt screen, select the drive group of the CacheCade virtual drive to be deleted, and press F2.

      The screen shown in Figure 8-77 is displayed.

      Figure 8-77 Deleting a CacheCade virtual drive
    2. Select Delete Drive Group and press Enter.

      A confirmation dialog box is displayed.

    3. Select YES and press Enter.

      The VD Mgmt screen is displayed.

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Updated: 2019-11-01

Document ID: EDOC1000004186

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