Greenergy offers data recovery services on complex RAID, SAN and NAS systems.
Greenergy is widely regarded as the most expert RAID data recovery company in
the world. We use our special developed technology to save many businesses from
failure, from large corporations to the smallest company, in every sector of
commerce and public services. we don't request user to provide RAID
configuration, block size, disk sequence, hardware or software RAID, we will
We have saved data even from:
- Charred RAID arrays burnt by fire
- Systems damaged by power failures
- Crashed disks due to mechanical failure
- Maliciously damaged systems, including virus damage
- Multiple drive failure
- RAID configuration corruption / Formated / Deleted
Our highly skilled technicians and engineers have
completed 2000 over cases of successful RAID recoveries! we support operating
systems and filing systems including:
||Windows Server NT/2000/2003
||Linux (All Flavours)
RAID ''Redundant Array of Inexpensive Disks", was designed to increase
the reliability of data storage, Should hardware failures on more than one drive
occur simultaneously due to power surge, mechanical failure, or controller card
failure the logical volumes will be lost along with the data. We can help! We
also understand the time sensitive nature of most RAID data losses.
Below is a list of currently used RAID types and RAID data recovery relevance:
RAID-0. This technique offers striping but no redundancy
of data. It offers the best performance but no fault-tolerance and if a drive
fails in RAID 0 only repair and reassembly of the volume will result in a
RAID-1. This type is also known as disk mirroring and
consists of at least two drives that duplicate the storage of data. This is may
become a problem should you experience a corruption of data. You will then have
2 copies of bad data. In a hardware failure scenario mirrors or RAID -1ís can
be recovered by software repairs. There is no striping on a 1 and read
performance is improved since either disk can be read at the same time. Write
performance is the same as for single disk storage.
RAID-2. This type uses striping across disks with some
disks storing error checking and correcting (ECC) information.
RAID-3. This type uses striping and dedicates one drive to
storing parity information. The embedded error checking (ECC) information is
used to detect errors. RAID Data recovery is accomplished by calculating the
exclusive OR (XOR) of the information recorded on the other drives. Since an I/O
operation addresses all drives at the same time, RAID-3 cannot overlap I/O.
Should 2 drives in the system fail at once, only hard drive repair and volume
restoration using software will result in a RAID data recovery.
RAID-4. This type uses large stripes, which means you can
read records from any single drive. This allows you to take advantage of
overlapped I/O for read operations. Since all write operations have to update
the parity drive, no I/O overlapping is possible. RAID-4 offers no advantage
RAID-5. (Most commonly used) This type includes a rotating
parity array, thus addressing the write limitation in RAID-4. All read and write
operations can be overlapped. RAID-5 stores parity information but not redundant
data (but parity information can be used to reconstruct data if enough of it
remains). RAID-5 requires at least three and usually five disks for the array
but can hold many more. Again, Should 2 drives in the system fail at once or teh
controller card error, only hard drive repair and/or volume restoration using
software will result in a RAID data recovery.
RAID-6. This type is similar to RAID-5 but includes a
second parity scheme that is distributed across different drives and thus offers
extremely high fault- and drive-failure tolerance. There are few or no
commercial examples currently.
RAID-7. This type includes a real-time embedded operating
system as a controller, caching via a high-speed bus, and other characteristics
of a stand-alone computer. Recoveries are possible but very difficult do to the
proprietary nature of the embedded OS and the storage format of the data.
RAID-10. This type offers an array of stripes in which each
stripe is a RAID-1 array of drives. This offers higher performance than RAID-1
but at much higher cost. Most recoveries cases from RAID 10 are not due to
hardware failure, but rather operator error and controller failure.
RAID-53. This type offers an array of stripes in which each
stripe is a RAID-3 array of disks. This offers higher performance than RAID-3
but at much higher cost.
If you need RAID data recovery, call us now!