How do I fix a failed raid drive?

This how-to describes how to replace a failing drive on a software RAID managed by the mdadm utility….Remove the failing disk from the RAID array.

1. Shut down the machine and replace the disk.
2. Partition the new disk.
3. Add the new disk to the RAID array.

How do I make my offline hard drive online?

Solution: To bring a disk that is Offline and Missing back online:

1. Repair any disk, controller, or cable problems.
2. Make sure that the physical disk is turned on, plugged in, and attached to the computer.
3. Next, use the Reactivate Disk command to bring the disk back online.

How do you troubleshoot a raid?

Reset the RAID Disks to NON-RAID

1. Press the Ctrl + i keys when prompted to enter the Intel RAID Option ROM utility.
2. Highlight Reset Disks to Non-RAID and press the ENTER key.
3. Highlight the RAID volume to be reset and press the Space key to select the disks.
4. Press the ENTER key to complete the selection.

What happens if a disk fails in RAID?

When a single disk in a RAID 5 disk array fails, the disk array status changes to Degraded. The disk array remains functional because the data on the failed disk can be rebuilt using parity and data on the remaining disks. If a hot-spare disk is available, the controller can rebuild the data on the disk automatically.

How do I know if my RAID disk failed?

Look in the syslog, and look at /proc/mdstat to see how the RAID is doing. Did it work? Faulty disks should appear marked with an (F) if you look at /proc/mdstat . Also, users of mdadm should see the device state as faulty .

How do I replace a failed RAID 1 drive?

1 Answer

1. Check whether your server supports hot plug – this is the easiest method: pull out the failed HDD, plug in the new one.
2. You should replace the disk with a type that matches the remaining disk.
3. You should only replace the disk once replacement has arrived.

What does it mean when a disk is offline?

When you take a disk offline, it will no longer show up or be accessible by users until an administrator brings it back online.

How do I fix virtual disk service error not found?

Install and launch AOMEI Partition Assistant on your PC. If the “The object is not found” error occurs on the external hard drive, connect it to your PC and make sure it can be detected. 2. At the main interface, right-click the space you want to create partition with and select Create Partition.

How do I know if my RAID drive failed?

The key is to find out what drive has failed. There is a RAID tool which can help, but he can’t get the computer to boot. Ed should run the RAID utility in the Asus BIOS, which should tell him which drive failed. This might be a job for a local expert.

How do I test raid?

How to Guide: Checking if a RAID is configured

1. Rick click on the “computer” icon on the desktop.
2. Select Manage.
3. Expand Storage.
4. Click Disk Management.
5. In the bottom center pane you’ll see different Disk numbers.
6. Under the Disk number you’ll see either Basic or Dynamic.

How did you check on the status of the now broken raid?

You can check the status of a software RAID array with the command cat /proc/mdstat.