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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).
Manually Creating a RAID 5 Array

Manually Creating a RAID 5 Array


  • 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.



  1. Back up data on hard drives and access the Configuration Utility main screen. For details, see Logging In to the Configuration Utility.
  2. Select the manual configuration mode.

    1. On the Configuration Utility main screen, click Configuration Wizard in the navigation tree.

      The Configuration Wizard screen is displayed.

      Figure 4-35 Configuration Wizard screen

      The Configuration Wizard screen provides the following configuration types:

      • Clear Configuration: clears the existing RAID configuration.
      • New Configuration: clears the existing RAID configuration and creates a RAID array.
      • Add Configuration: adds new drives to the existing configuration. The procedure for adding drives is the same as you add drives when creating a RAID array. This parameter is not displayed if no hard drives are available for creating a RAID array.

      Exercise caution when selecting New Configuration. If you select New Configuration, the existing configuration of the selected physical drives will be deleted. Add Configuration is recommended if you want to create a RAID array.

    2. Select Add Configuration and click Next.

      The Confirm Page screen is displayed.

    3. Click Yes.

      The Select Configuration Method screen is displayed.

      Figure 4-36 Select Configuration Method screen

      Table 4-15 describes the parameters on the screen.

      Table 4-15 Parameters on Select Configuration Method



      Manual Configuration

      Allows users to control all storage attributes and set parameters.

      Automatic Configuration

      Automatically creates an optimal RAID configuration.

      • Redundancy: specifies whether to enable the redundancy function.
        • Redundancy when possible: The system automatically configures the existing hard drives as a RAID array with redundancy when possible.

          If there are two hard drives, the system automatically configures RAID 1. If there are three or more hard drives, the system automatically configures RAID 5 or RAID 6. The system does not support automatic configuration of RAD 10, RAID 50, or RAID 60.

        • No Redundancy: The system automatically configures existing hard drives as a RAID 0 array, that is the array without redundancy.

          Default value: Redundancy when possible

      • Data Protection: specifies whether to enable data protection, which is an advanced feature of RAID controller cards. A unique key for each member hard drive is used to encrypt data by supported hard drives. Such data cannot be accessed from removed hard drives without the key. This setting is valid only for hard drives that support data encryption.
        • Disabled
        • Enabled

          Default value: Disabled

    4. Select Manual Configuration and click Next.

      The Drive Group Definition screen is displayed.

      Figure 4-37 Drive Group Definition screen

      Table 4-16 describes the parameter on the screen.

      Table 4-16 Parameter on Drive Group Definition



      Data protection

      Specifies whether to enable data protection, which is an advanced feature of RAID controller cards. A unique key for each member hard drive is used to encrypt data by supported hard drives. Such data cannot be accessed from removed hard drives without the key.

      • Disabled
      • Enabled

      Default value: Disabled


      This setting is valid only for hard drives that support data encryption.

  3. Add hard drives to the hard drive list.

    1. In the Drives pane on the left of the screen, select hard drives to be added to Drive Group 0.
    2. Click Add To Array to add the hard drives to the Drive Groups pane on the right.

      For example, Figure 4-38 shows the screen where all hard drives are added to Driver Group 0.

      Figure 4-38 Adding hard drives to a drive group
      • If the hard drives in the same group have different sizes, the capacity of the RAID array to be created is affected and an alarm will be generated when you click Accept DG. It is recommended that you use hard drives with the same specifications to create a RAID array.
      • To release a selected hard drive, select the hard drive in Drive Groups and click Reclaim.
      • A RAID 5 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.
    3. Click Accept DG to accept the hard drive list.

      The screen shown in Figure 4-39 is displayed.

      Figure 4-39 Accepting a hard drive list

    4. Click Next.

      The Span Definition screen is displayed.

      Figure 4-40 Span Definition screen

    5. Select the drive group from Array With Free Space.
    6. Click Add To SPAN.

      The drive group is added to the Span pane on the right.

      Figure 4-41 Adding drive groups to the span list

  4. Configure the RAID level.

    1. Click Next.

      The Virtual Drive Definition screen is displayed.

      Figure 4-42 Virtual Drive Definition screen

      Table 4-17 describes the parameters on the screen.

      Table 4-17 Parameters on Virtual Drive Definition



      RAID Level

      RAID level.

      • RAID 0
      • RAID 1
      • RAID 5
      • RAID 6
      • RAID 10
      • RAID 50
      • RAID 60

      Strip Size

      Volume of hard drive data on each strip.

      • 8 KB
      • 16 KB
      • 32 KB
      • 64 KB
      • 128 KB
      • 256 KB
      • 512 KB
      • 1 MB

      Default value: 256 KB

      The default size is used during RAID configuration.

      Access Policy

      Data access policy.

      • RW: The virtual drive is readable and writable.
      • Read Only: The virtual drive is read-only.
      • Blocked: The virtual drive is blocked from access.

      Default value: RW

      Read Policy

      Options for reading data on a virtual drive.

      • No Read Ahead: disables the Read Ahead function.
      • Always Read Ahead: enables the Read Ahead function. The RAID controller card prefetches sequential data or data to be used and stores it in the cache.

      Default value: Always Read Ahead


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

      Write Policy

      Write policy for data on a virtual drive.

      • Always Write Back: Once all data in the cache is received, the controller notifies the host that data transmission is complete.

      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.

      • Write Through: Once the drive subsystem receives all data, the controller 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 controller card has Pinned/Preserved cache. It is recommended that you set the write policy to this mode.

      Default value: Write Through

      IO 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 Always 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


      The LSI SAS2208 does not support the CacheCade function.

      Drive Cache

      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.

      Default value: Unchanged

      Disable BGI

      Specifies whether to disable background initialization (BGI).

      • No: enables background initialization. In this mode, the background automatically starts initializing virtual drives.
      • Yes: disables background initialization.

      Default value: No

      Select Size

      Size of a virtual drive. If multiple virtual drives need to be created in a drive group, the specified capacity must be smaller than the total capacity.


      You can click Update Size to set the value of Select Size as the remaining drive space in the current RAID mode if any of the following conditions are met:

      • Only one virtual drive needs to be created for a drive group.
      • The virtual drive to be created is the last one for a drive group with multiple virtual drives.
    2. Select RAID 5 from the RAID Level.
    3. Set the parameters on the Virtual Drive Definition screen as required.

      If only one virtual drive needs to be configured, click Update Size and then Accept.

  5. (Optional) Configure the RAID array capacity.

    To divide a drive group into multiple virtual drives, you need to manually configure the capacity for each virtual drive.

    1. Enter the virtual drive capacity to be configured in the Select Size text box and click Accept.

      For example, after you set the capacity of VD 0, VD 0 is displayed under Drive Group 0.

      Figure 4-43 Configuration result

  6. (Optional) Create multiple virtual drives.

    Each drive group supports a maximum of 16 virtual drives.

    1. On the screen shown in Figure 4-43, click Back and repeat 3 to 5 for each virtual drive to be created.

      In this example, three virtual drives are created.

      Figure 4-44 Creating multiple virtual drives
    2. On the screen shown in Figure 4-44, click Next.

      The configuration result is displayed.

      Figure 4-45 Configuration result
    3. Click Accept.

    A confirmation dialog box is displayed.

    1. Click Yes.

      The initialization information shown in Figure 4-46 is displayed.

      Figure 4-46 Initialization information

      Initializing virtual drives will damage data on the virtual drives. If the original data on the hard drives needs to be retained, select No.

  7. Initialize virtual drives.

    1. Click Yes.

      RAID initialization starts.

      After the initialization, Optimal is displayed in the Virtual Drives pane.

      Figure 4-47 Virtual drive status

  8. Check the configuration result.

    1. Click Home in the lower left corner.
    The Configuration Utility main screen is displayed. The configured RAID information is displayed in the Logical View area.
    Figure 4-48 Manually configured RAID information

Updated: 2019-11-01

Document ID: EDOC1000004186

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