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Rebuild RAID Array

Trident supports the rebuild-raid subcommand to rebuild RAID arrays. Refer to Rebuild RAID for a detailed explanation of the term.

Prerequisites​

Before you start, make sure you've completed the following:

  1. Provisioned Host: Ensure the host is provisioned with Trident.
  2. Disk Compatibility: Replace the failed disk with a similar disk.
  3. Active RAID Members: Verify an active copy of RAID members is available for recovery.
  4. Supported Configuration: Ensure the replaced disk’s configuration contains recoverable RAID members or unformatted partitions.

Steps​

The aim here is to restore your RAID array to full functionality after a disk failure, using the Trident tool. This involves replacing the failed disk and ensuring the new disk is properly integrated into the RAID configuration.

Step 1: Replace the Failed Disk​

First, you need to physically replace the failed disk with a new one. Follow these detailed actions:

  1. Remove the Failed Disk: Carefully extract the defective disk from the storage array.
  2. Install the New Disk: Insert a new, compatible disk in its place. Make sure the new disk meets the required specifications of the failed disk to ensure compatibility and proper functionality.

Step 2: Initiate the Rebuild RAID Operation with Trident​

Once the new disk is installed, you’ll need to use Trident to initiate the rebuild process. Here’s how you do it:

  1. Run the Command: Use the following command to start the rebuild process:

    trident rebuild-raid

  2. Monitor the Process: Watch the rebuild process to ensure it completes successfully.

    On successful validation, Trident will exit silently with a zero exit code.

    On validation failure, Trident will exit with a non-zero exit code and print the error that caused the rebuild process to fail.