Rebuilding RAID: Step-By-Step

What is RAID?
Computer age brought us the need of having storage devices. We increasingly create data every day like emails, images, documents, videos, and other types of files. Because of the massive accumulation of data, we prefer to increase our storage capacity instead of finding out what should be deleted or not. Because of this need, technologies came up with inexpensive solutions for soaring demand of data storage. And this is why RAID technology is introduced. RAID or Redundant Array of Independent Disks is a part of a modern storage solution wherein physical drives are put together to create a single storage unit. This multiple storages is employed by having a controller or by device drivers.

Because of the complexity of this device, there is a chance that its components will fail. If a concurrent disk failure occurs, mostly RAID designs can overcome the failure of its parts. However, there are kinds of failures wherein RAID alone can’t recover its own configurations parameter or set of data. With this helpless situation, a RAID rebuild is required.

What is a RAID rebuild?
When a hard disk drive fails to work, a RAID rebuild is done. It is the reconstruction of data on RAID wherein data are being copied to a spare drive with the use of RAID algorithms and parity computations. Also, RAID rebuilds can also act in advance if a hard drive is near to failure. During the time wherein rebuild is done, latency will greatly affect the applications and processes. Latency is the delay in output that occurs between the cause and effect of the observed physical change of a system.

How to act on if RAID failed?

  • Rebuilding RAID starts by securing its current array state and by labelling any information from the disks, ports, and configuration controllers.
  • You will be needing a controller that can work with separate disks wherein an Array member disk is being connected. They can be a non RAID or RAID controller that is working in a single drive mode.
  • Recover the array parameter or data by launching the ReclaiMe Free RAID Recovery.
  • In accordance to the parameters dictated by ReclaiMe Free RAID Recovery, you can build the array even if the controller and RAID monitoring software allowed you to without initializing. This decision is very crucial since a mistake, like rebuilding RAID 5 with wrong disk order, will give a tendency that data will be lost and most of all, controller can initialize array with a value of zero.
  • If you are utilizing a hardware RAID, write the array to the disk in accordance to the features of ReclaiMe Free RAID Recovery. Then try to ascend the disk depending on what operating system you are using.
  • With software RAID, you will be needing a data recovery software.
  • Load an array image file to the data recovery tool
  • Try to bypass the image file and load the recovered array parameter to the data recovery tool.
  • Check the data saved by opening a few large files at once to make sure that the data being recovered is constructed correctly. Duplicate the data after rebuilding the original RAID.
    The following plan is not only specified to redundancy regeneration in RAID 5, but it is for rebuilding RAID seen in general form.