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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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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Creating RAID 0

Creating RAID 0

  • 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 SAS3108 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.

Workflow

Procedure

  1. Back 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. Press Ctrl+P or Ctrl+N to switch to the VD Mgmt tab.
    2. Use and to select SAS3108 (Bus 0x01, Dev 0x00), and press F2.
    3. On the screen displayed, select Create Virtual Drive and press Enter.

      The screen shown in Figure 8-6 is displayed.

      Figure 8-6 Creating a RAID array

  3. Configure the RAID level.

    1. Press Enter in the RAID Level area, and use or to set the RAID level RAID-0.

      The default RAID level is RAID 0.

  4. Set the number of hard drives for each RAID span.

    This step is optional for RAID 0, 1, 5, and 6, but mandatory for RAID 10, 50, and 60.

    1. Press to move the cursor to the PD per Span list.
    2. Set the number of hard drives for each RAID span.

  5. Add hard drives.

    1. Select Drives by using .
    2. Press and to select a hard drive to be added and press Enter, as shown in Figure 8-7.
      • [X] is displayed in the ID column for a selected hard drive.
      • If the total number of hard drives in all RAID arrays under a RAID controller card exceeds 32 or 240 (depending on the RAID key specifications), no hard drive can be added to RAID arrays.
      Figure 8-7 Adding hard drives to a RAID array

  6. Set the RAID capacity and name.

    1. Enter the virtual drive capacity in Size.
      • If multiple virtual drives are not required, go to 8 after setting the virtual drive name. The RAID capacity is set to the maximum value by default.
      • If the drive group needs to be divided into multiple virtual drives, manually set the virtual drive capacity. For details, see 6 to 7. Each drive group supports a maximum of 16 virtual drives.
    2. Use to select Name, enter the RAID name, and select OK.

      A message is displayed asking you whether to set the RAID name.

    3. Select OK and press Enter.

      The VD Mgmt screen is displayed.

  7. (Optional) Create multiple virtual drives.

    1. After creating a drive group, choose Drive Group in the VD Mgmt screen and press F2, and select Add New VD.

      The Add VD in Drive Group screen is displayed.

    2. Enter the virtual drive capacity in Size, select OK, and press Enter.

      A confirmation message is displayed.

    3. Select OK and press Enter.

      The VD Mgmt screen is displayed. Virtual drives are created.

  8. Set advanced properties.

    1. In the main menu displayed in Figure 8-7, Select Advanced by using , and press Enter.

      The screen for setting advanced RAID properties is displayed, as shown in Figure 8-8.

      Figure 8-8 Setting advanced properties

      Table 8-7 describes the parameters of advanced properties.

      Table 8-7 Parameters

      Item

      Description

      Strip Size

      Volume of hard drive data on each strip. 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.

      • Normal: disables the Read Ahead function.
      • Ahead: enables the Read Ahead function. The controller card prefetches sequential data or data to be used and stores it in the cache.
      NOTE:

      To achieve optimal disk performance, set the policy to Ahead for HDDs and Normal for SSDs.

      Write Policy

      Options for writing data on a virtual drive. The write policy of virtual drives varies with the firmware version of the LSI SAS3108 RAID controller card.

      • If the firmware version of the LSI SAS3108 RAID controller card is 4.270.00-4382 or earlier, the following write policies are supported:
        • 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.
        • Write Back with BBU: The controller card automatically switches to the Write Through mode when the controller card has no Battery Backup Unit (BBU), the BBU is on charge or discharge, the BBU is faulty, or the Pinned/Preserved cache reaches 50% of the physical cache. It is recommended that you set the write policy to this mode.
      • If the firmware version of the LSI SAS3108 RAID controller card is 4.650.00-6121 or later, the following write policies are supported:
        • Write Back: The controller card automatically switches to the Write Through mode when the controller card has no Battery Backup Unit (BBU), the BBU is on charge or discharge, the BBU is faulty, or the Pinned/Preserved cache reaches 50% of the physical cache. It is recommended that you set the write policy to this mode.
        • Write Through: Once the drive subsystem receives all data, the controller card notifies the host that data transmission is complete.
        • Always Write Back: Once all data in the cache is received, the controller card notifies the host that data transmission is complete.
      NOTE:

      In Always Write Back mode, DDR write data of the controller card will be lost if the supercapacitor is not installed or being charged. This mode is not recommended.

      I/O Policy

      Options for data I/O of 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 Ahead, data is read from the RAID 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.

      Disk cache Policy

      Cache policy for physical hard drives.

      • Enable: writes data to the cache before writing data to the hard drive. This option improves data write performance, but data may be lost due to power failure without a power failure protection mechanism.
      • Disable: writes data to a hard drive without caching. Data is not lost in the event of power failure.
      • Unchanged: uses the current cache policy.

      Emulation

      Sets the virtual sector size.

      NOTE:

      This parameter is supported only when the firmware version of the LSI SAS3108 is 4.660.00-8102 or later.

      Initialize

      Performs initialization once the RAID array is created. The initialization will damage data stored on RAID member drives.

      [X] is displayed in front of the selected hard drive.

      Configure HotSpare

      Configures hot spare drives for a RAID array.

      [X] is displayed in front of the selected hard drive.

      This parameter is invalid for RAID 0 arrays.

      Disable BGI

      Disables the BGI function.

      NOTE:
      • This parameter is supported only when the firmware version of the LSI SAS3108 is 4.660.00-8102 or later.
      • If this parameter is selected, the BGI function is disabled. If this parameter is not selected, the background automatically initializes the virtual drive.
      • This parameter is deselected by default.
    2. Set advanced RAID properties as required.

      Initialization will damage data on hard disks. If the original data on the hard drives needs to be retained, do not select Initialize on the screen shown in Figure 8-8.

    3. Select OK and press Enter.

      The Create New VD screen is displayed.

    4. Select OK and press Enter.

      If Initialize is selected, a confirmation dialog box is displayed when the initialization is complete. Press Enter to return to the main screen.

  9. Check the configuration result.

    On the Configuration Utility main screen, press to query configuration details.
    Figure 8-9 Configuration details

  10. Exit the Configuration Utility.

    1. Press Esc.

      A confirmation dialog box is displayed.

    2. Select OK and press Enter.

      The Configuration Utility main screen is closed, and the system prompts you to restart the system.

    3. Restart the server.

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Updated: 2019-11-01

Document ID: EDOC1000004186

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