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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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Creating RAID 6

Creating RAID 6

  • Data on a hard drive will be deleted after the hard drive is added to a RAID array. Before creating a RAID array, check that there is no data on hard drives or the data on hard drives is not required. If the hard disk data needs to be retained, back up the data first.
  • The LSI SAS2208 supports SAS/SATA HDDs and SSDs. Hard drives in one RAID array must be of the same type, but can have different capacities or be provided by different vendors.
  • RAID 0, 1, 5, 6, 10, 50, and 60 lists the number of hard drives required by each RAID level.

Procedure

  1. Backed up data on hard drives and access the Configuration Utility main screen. For details, see Logging In to the Configuration Utility.
  2. Log in to the Create Virtual Drive screen.

    1. On the main screen, select Main Menu and press Enter.
    2. Select Configuration Management and press Enter.
    3. Select Create Virtual Drive and press Enter.

      The RAID array configuration screen is displayed, as shown in Figure 4-134. Table 4-38 describes the parameters on the screen.

      Figure 4-134 Create Virtual Drive
      Table 4-38 Parameter description

      Parameter

      Description

      Select RAID Level

      Selects a RAID level.

      Protect Virtual Drive

      Status of virtual drive data protection.

      Select Drives From

      Source of member drives of the virtual drive:

      • Unconfigured Capacity: Idle drives that are not added to any virtual drives.
      • Free Capacity: Remaining space of the virtual drive.

      Select Drives

      Selects member drives.

      Virtual Drive Name

      Name of the virtual drive.

      Virtual Drive Size

      Capacity of the virtual drive. The default value is the current largest capacity supported.

      Virtual Drive Size Unit

      Unit of capacity.

      Strip Size

      Strip size of the virtual drive. Options include 64 KB, 128 KB, 256 KB, 512 KB, and 1 MB. The default value is 256 KB.

      The default size is used during RAID configuration.

      Read Policy

      Options for reading data on a virtual drive.

      • No Read Ahead: disables the Read Ahead function.
      • Read Ahead: enables the Read Ahead function. The controller pre-reads sequential data or the data predicted to be used and saves it in the cache.

        Default value: Read Ahead

      NOTE:

      To achieve optimal disk performance, set the policy to Read Ahead for HDDs and No Read Ahead for SSDs.

      Write Policy

      Default cache write policy of the RAID array.

      The values of this parameter vary depending on the firmware version.

      • If the firmware version of the LSI SAS2208 is 3.460.165-8277, the cache write policies are as follows:
        • Write Through: Once the drive subsystem receives all data, the controller notifies the host that data transmission is complete.
        • Write Back: If the supercapacitor is not configured or the supercapacitor is faulty, the RAID controller card automatically switches to the Write Through mode.
        • Always Write Back: Once the cache receives all data, the controller notifies the host that data transmission is complete.
      • If the firmware version of the LSI SAS2208 is 3.400.95-4061, the cache write policies are as follows:
        • Write Through: Once the drive subsystem receives all data, the controller notifies the host that data transmission is complete.
        • Write Back: If the supercapacitor is not configured or the supercapacitor is faulty, the RAID controller card automatically switches to the Write Through mode.
        • Force Write Back: Once the cache receives all data, the controller notifies the host that data transmission is complete.
        Default value: Write Back
        NOTE:
        If this parameter is set to Write Back,, the current write cache policy will automatically change to Write Through when:
        • The RAID controller card does not have a supercapacitor.
        • The supercapacitor is being charged and discharged.
        • The supercapacitor is damaged.
        • Pinned or preserved cache exists.

        If this parameter is set to Always Write Back or Force Write Back, the DDR write data of the RAID controller card will be lost when:

        • The server is powered off unexpectedly.
        • The supercapacitor is not installed.
        • The supercapacior is being charged.

        This mode is not recommended.

      I/O Policy

      Options for reading data from special virtual drives. This policy does not affect cache prefetch.

      • Direct:
        • Read scenarios: Data is directly read from hard drives. (If Read Policy is set to Read Ahead, data is read from the cache.)
        • Write scenarios: Data is written to the RAID cache. (If Write Policy is set to Write Through, data is directly written into hard drives.)
      • Cached: Data is read from or written to the cache. Use this option only when configuring CacheCade 1.1.

      Default value: Direct

      NOTE:

      The LSI SAS2208 does not support the CacheCade function.

      Access Policy

      Data access policy.

      • Read/Write: Read and write operations are allowed.
      • Read Only: The virtual drive is read-only.
      • Blocked: The virtual drive is blocked from access.

      Default value: Read/Write

      Drive Cache

      Physical hard drive cache policy.

      • Unchanged: uses the current cache policy.
      • Enable: writes data to the cache before writing data to the hard drive. This option improves data write performance. However, data will be lost if there is no protection mechanism against power failures.
      • Disable: writes data to a hard drive without caching. Data is not lost in the event of power failure.

      Default value: Unchanged

      Disable Background Initialization

      Enables or disables background initialization.

      Default Initialization

      Default initialization mode.

      • No: Initialization is not performed.
      • Fast: Fast initialization.
      • Full: Full initialization.

      Emulation Type

      Sets the sector size reported to the OS.

      If the member drive is 512B/512B:

      • Default: The logical drive sector is 512B/512B.
      • None: The logical drive sector is 512B/512B.
      • Force: The logical drive sector is 512B/4KB.

      If the member drive is 512B/4KB:

      • Default: The logical drive sector is 512B/4KB.
      • None: The logical drive sector is 512B/512B.
      • Force: The logical drive sector is 512B/4KB.

      Save Configuration

      Save the settings.

  3. Select a RAID level.

    1. Use the and arrow keys to select a RAID level and press Enter.
    2. Select RAID 6 and press Enter.

  4. Add member drives.

    • A RAID 6 array supports 3 to 32 hard drives.
    • If the total number of hard drives in all RAID arrays under a RAID controller card exceeds 16 or 32 (depending on the RAID key specifications), no hard drive can be added to RAID arrays.
    1. Use the and arrow keys to select Select Drives From and press Enter.
    2. Select the source of member drives and press Enter.

      In this example, Unconfigured Capacity is selected.

      The screen for adding member drives is displayed, as shown in Figure 4-135. Table 4-39 describes the parameters on the screen.

      Figure 4-135 Adding member drives

      Table 4-39 Parameter description

      Parameter

      Description

      Select Media Type

      Hard drive media type.

      Select Interface Type

      Hard drive port type.

      Logical Sector Size

      Partition size.

      Check All

      Selects all hard drives.

      Uncheck All

      Deselects all hard drives.

      Apply Changes

      Saves settings.

    3. Set parameters as required.
    4. Select the drive to be added and press Enter.
    5. Select Enable and press Enter to select the drive.
    6. Select Apply Changes and press Enter.

      The message "The operation has been performed successfully" is displayed.

    7. Select OK and press Enter.

  5. Set the virtual drive properties.

    1. Set other properties of the virtual drive by referring to Figure 4-281.

  6. Save the settings.

    1. Select Save Configuration and press Enter.

      A confirmation screen is displayed.

    2. Select Confirm and press Enter.
    3. Select Enable and press Enter.
    4. Select Yes and press Enter.

      The message "The operation has been performed successfully" is displayed.

    5. Select OK and press Enter.

  7. Check the configuration result.

    1. Press Esc to return to the previous screen.
    2. Select Virtual Drive Management and press Enter.

      Current RAID information is displayed.

  8. Exit the configuration screen.

    1. Press Esc to go back to the Advanced screen.
    2. Press F10 to exit the BIOS.

      A confirmation dialog box is displayed.

    3. Select Yes and press Enter.

      A message is displayed prompting you to restart the system.

    4. Restart the server.

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Updated: 2019-11-01

Document ID: EDOC1000004186

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