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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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Migrating the RAID Level

Migrating the RAID Level

Scenarios

RAID level migration is a process of converting one RAID configuration to another. RAID controller cards support RAID level migration as the data volume and number of hard drives increase in the system.

You can perform RAID level migration on the Configuration Utility. Typically, an array is reconfigured with the same or more storage capacity. Sometimes, additional drives are added.

Impact on the System

If a hard drive fault occurs during RAID level migration, the following will occur:

  • If a faulty hard drive exists and the RAID array does not contain redundant data (for example, a faulty hard drive exists during RAID 0 level migration), the RAID array fails.
  • If a faulty hard drive exists and the RAID array still contains redundant data (for example, a faulty hard drive exists during RAID 1 level migration), the migration continues. When the migration is complete, replace the faulty hard drive and rebuild the RAID array.

Perform RAID level migration with caution.

Prerequisites

Conditions

The following conditions must be met before you migrate a RAID level:

  • You have logged in to the server through a remote virtual console and can manage the server on a real-time basis.
  • The current number of hard drives meets the requirements of the target RAID level.
  • You have accessed the Configuration Utility main screen. For details, see Logging In to the Configuration Utility.

LSI SAS3108controller cards support the following RAID level migration modes:

  • Migrate RAID 0 to RAID 1, 5, or 6.
  • Migrate RAID 1 to RAID 0, 5, or 6.
  • Migrate RAID 5 to RAID 0 or 6.
  • Migrate RAID 6 to RAID 0 or 5.
  • If a DG has two or more RAID arrays, RAID level migration is not supported.

Table 8-32 lists the minimum numbers of hard drives to be added for RAID level migration.

Table 8-32 Minimum numbers of hard drives to be added for RAID level migration

RAID Level Migration

Number of Existing Hard Drives

Minimum Total Hard Drives to Be Added

RAID 0 -> RAID 1

1

1

RAID 0 -> RAID 5

1

2

RAID 0 -> RAID 6

1

2

RAID 1 -> RAID 0

2

0

RAID 1 -> RAID 5

2

1

RAID 1 -> RAID 6

2

1

RAID 5 -> RAID 0

3

0

RAID 5 -> RAID 6

3

1

RAID 6 -> RAID 0

3

0

RAID 6 -> RAID 5

3

0

Data

You have backed up data on hard drives.

Procedure

  1. Access the Virtual Drive Management screen.

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

      The virtual drive option screen is displayed, as shown in Figure 8-103.

      Figure 8-103 Virtual drive option screen

  2. Select a new RAID level.

    The following describes migration from RAID 1 to RAID 5.

    1. Select the RAID to be migrated and press Enter.
    2. Select Operation and press Enter.

      The Operation screen is displayed, as shown in Figure 8-104.

      Figure 8-104 Operation
    3. Select Reconfigure Virtual Drives and press Enter.
    4. Select Advanced... and press Enter to set other properties for the RAID array. See Figure 8-105. If the parameters are not set, the settings of the original RAID array are used by default.
      Figure 8-105 Advanced...
    5. Select Go and press Enter.

      The Reconfigure Virtual Drives screen is displayed, as shown in Figure 8-106.

      Figure 8-106 Reconfigure Virtual Drives
    6. Select New RAID Level and press Enter.

      The dialog box shown in Figure 8-107 is displayed.

      Figure 8-107 Selecting a new RAID level
    7. Select RAID 5 and press Enter.

  3. Add hard drives.

    1. Select Choose the operation and press Enter.

      The hard disk selection dialog box is displayed.

    2. Select the hard drives to be added and press Enter.

      Table 8-32 lists the minimum numbers of hard drives to be added for various RAID levels.

    3. Select Apply Changes and press Enter.

      A confirmation dialog box is displayed.

    4. Select Confirm and press Enter.
    5. Select Yes and press Enter.

      The system displays a message indicating that the operation is successful.

    6. Press Enter.

      The screen shown in Figure 8-106 is displayed.

  4. Migrate the RAID level.

    1. Select Start Operation and press Enter.

      The system displays a message indicating that the operation is successful.

    2. Select OK and press Enter.

  5. Check the migration result.

    1. Go to the Virtual Drive Management screen and check the result. The screen shown in Figure 8-108 indicates that the migration is going on.
      Figure 8-108 Checking the migration result

      After the migration is complete, the background initialization of the RAID array automatically starts, as shown in Figure 8-109. The background initialization is a self-check of the RAID array and does not result in configuration data loss.

      Figure 8-109 Background initialization
    2. Select a virtual hard drive and press Enter. The screen shown in Figure 8-110 is displayed. The migration is successful when the RAID level changes from RAID 1 to RAID 5, the RAID array capacity changes, and the value of Status changes to Optimal.
      Figure 8-110 Checking the migration result

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Updated: 2019-11-01

Document ID: EDOC1000004186

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