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RAID Data Recovery


In the past decade almost all businesses have turned from single drive data storage to high speed, multi-cached, distributed I/O configurations: RAID (Redundant Array of Independent Disks). RAID is configured system for its increased data performance and mission-critical applications and combines multiple hard disk drives into a single logical unit by two ways:

Hardware RAID is created by a RAID controller, and appears as one hard drive to any operating system. This type requires a RAID controller but provides the ability to use it under any operating system.

Software RAID is created by the operating system's hard disk driver, and is visible as RAID only to this operating system.

The most common RAID configurations:

RAID 0: Striped set of two or more hard disk drives without parity. The total size of RAID 0 is determined by the smallest hard drive size multiplied by the number of disks. An advantage of this type is improved speed performance and additional storage. But disadvantage of RAID 0 is that any hard disk failure destroys the array, and is more likely to fail.

RAID 1: Mirrored set of 2 hard disks as minimum, without parity. The size of RAID 1 is the size of the smallest hard drive as the speed of the slowest hard disk. This RAID configuration gives more reliability and provides fault tolerance from disk errors and single disk failure. Array keep operating with one failed drive.

RAID 5: Striped set of 3 disks minimum with distributed parity. Distributed parity requires one drive to to keep redundancy information. Redundancy information provides the ability to restore the RAID if one of hard disks is failed and requires replacement. The RAID 5 will have data loss in case of a second drive failure and is vulnerable until the lost data will be recovered and rebuilt onto a replacement drive.

RAID systems are vulnerable to the same failures that a single hard drive. Moreover, due to their complexity, they may have additional suffering points.

Common reasons of array system failure and situations::

Accidental deletions.
Accidental reformatting.
Bad sectors
Controller Malfunction
Firmware corruption
Damaged hard drive
Head Crashes
Missing Partitions
Overwritten RAID configuration
Overwritten RAID settings
RAID configuration corruption
RAID controller failure
RAID disk corruption
RAID drive overheat
RAID incorrect configuration
RAID incorrect setup
RAID rebuild failure
RAID user error
Virus attack
Unbootable system

Vital Data Recovery specializes in advanced RAID Data Recovery services. We understand that the array system or server failure is the most terrible media failures that can happen in a business environment. Therefore, every RAID recovery case addresses to a high priority importance.

We recover and support most common RAID system 0, 1, 5 in both software and hardware RAID configurations and any platform. Unlike single hard drive recovery, RAID recovery is more complicated due to parity, drive order, rebuilds, drive synchronization. Therefore, we recommend you do not attempt to restore the array on your own. Any attempts decrease the chances for a successful recovery.

If you are suffering from RAID failure and your lost data is critical, please call toll free 1-888-570-0775 to consult a RAID data recovery expert.