Data Recovery from failed RAID

RAID was originally taken to mean redundant array of inexpensive disks but currently, it is commonly known as the redundant array of inexpensive disks. This is a form of data storage technology that combines and harnesses several disk drive components into a given logical unit for performance improvement or data redundancy. Most individuals and businesses use RAID to provide security for their solid-state drives (SSDs) without the expense of the whole SSD system. It often provides a very high level of integrity hence enabling SSDs to perform at peak level. But when the RAID fails then functioning often compares to being caught up between a rock and a hard place.

There are basically two types of RAID failure:

  1. RAID member disk failure

This happens when one or several RAID member disks fail. In the case of RAID 0, the arrays are not redundant. Therefore when a member fails then all the data in the failed disk will be lost forever. If you have data from all the remaining member disks

  1. RAID failure that is not associated with loss of the member

Some of these failures include controller failures, operator errors, or software failures. When there is a configuration problem, metadata is lost. However, the member disks still work properly. Despite all these failures, our expert teams are still able to recover data from any RAID system and systematically determine configuration of the array. The basic RAID O configuration includes the following:

  • Block size
  • The number of member disks
  • Start offset on disks
  • The disk order and the disk that was first in the array

Determining the Disk Order

In providing data recovery from failed RAID services, our data recovery experts normally determine the disk order by relying on long text files through manual methods. The use of log-files that have timestamps is very popular. When searching disk members of such files, the experts engage disk viewer tools including WinHex. And when they spot a fragment associated with a suitable file in one of the member disks, it is then used to track the disk that contains the fragment in succession. This helps the experts to determine the order of disks even though finding the disk that appeared first becomes very difficult.

Determining the First Disk

Determining the disk that appeared first in RAID may be difficult but experts always handle the process with a very high level of precision. A disk viewer tool is used to search the disk members for MBR when the affected part of the RAID is the hardware and the boot sector in case the affected area is the RAID software.

Determining the Block Size

The block size is also referred to as the strip size. In the case of hardware RAID, the block size can be determined by going through possible values or looking up the block size that can be used in RAID implementation in an appropriate manual. Experts use the standard value in the case of software RAID.

Determining Start Offset on Member Disks

The data mostly starts at the beginning of a hard drive in the case of hardware RAID. This, in essence, is equivalent to a zero offset. When software RAID is used, offsets will be identical for all the member disks in most cases. Offset(s) to the volume start are identified through locating of the volume boot sector.

RAID Recovery Services

With an industrious and dedicated group of data recovery professionals, we can handle any form of RAID recovery that comes our way. We apply advanced data recovery techniques and tools to recover, repair and systematically rebuild any inaccessible data from all forms of RAID situations and systems including:

  • Any level of RAID such as 0, 1, 5, 6 and others
  • Any type of hard drive involved, the model or make
  • Any RAID controller and RAID architecture including the software defined storage (SDS)
  • Any other cause of data loss ranging from simple to complex and catastrophic situations of data loss. This also includes data loss as a result of natural disaster, human error, logical failure, hardware failure, power loss or surge.

RAID devices not only offer data redundancy reliability but also provide for reconstruction of information contained therein from all the remaining hard drives in case one of the hard drives fails. The devices also spread the data in such a manner that it can be easily read and used in a much faster manner. RAID devices also offer high performance, greater speed and high level resistance to any possibility of data loss. These devices have also been built with advanced technology such that when one of the hard drives fails, the next one still continues to function. Therefore, the IT specialist may still be able to access data because the next one comes in line. However, all data becomes inaccessible when all the hard drives finally fail.

RAID Data Recovery Services are Invaluable

RAID data recovery services are quite invaluable for three reasons:

  • They can help you from losing clients especially if you have built customer lists and entered potential details such as promotional codes and coupons
  • They can help restore a catastrophic situation to normality thus enabling your staff members to continue serving customers without any disturbance
  • They can help you recover priceless data including competitor information, tax information and records, and employee payroll records

There are several reasons why you need to invest in RAID data recovery services to prevent unprecedented collapse of your business operations.

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About the Author: Allison Whitehead holds a degree in Computer Science and Master’s degree in Forensic Science from the University of California. She is currently pursuing her PhD degree in Software Engineering at Loma Linda University. She has worked for several technology companies including Oracle and is currently a CNET advisor. She has written a thesis on RAID that has helped the pioneers from the University of California to make some improvements on the technology. She is an author, publisher, motivational speaker and tutor as well. Allison has published articles in numerous topics in various article directories and journals. She is constantly conducting research and analyzing data to make deductions that improve the user experience of IT software and hardware.

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