In RAID (Redundant Array of Independent Disks) array, Parity is a common technique that is used to detect the system memory faults and it contains the analogous functionality for RAID. The principle behind introducing parity in RAID array is to improve data protection. The parity is generally redundant information, which is calculated from actual data values and is stored across all array disks or on a separate drive. But if the parity information goes missing, you may face critical situations of RAID failure and data loss. At this point, to retrieve data from damaged RAID array, you need to go for Data Recovery Services.
The parity is analyzed as a result of logical operation, for instance OR or XOR. The XOR operator provides true results if any of the operands is true. The resulted truth table would be used for the mirroring and redundancy technique. When you apply the RAID parity, it would cost you more as the data is duplicated over the drives.
The main purpose of RAID parity implementation is to avoid data loss situations due to the RAID failure. Therefore, the recovery from an array, which has lost any mirrored drive isn't a difficult process. RAID 7, 5 and 3 implement a technology, which is somewhat similar to the RAID parity, but does not match exactly to the actual one. But in some cases, RAID parity may get damaged due to following reasons and put you in need of Data Recovery Services:
Server crash: In case of server crash, the parity may not be written properly on the drive. Thus it can not be used to rebuild the array and restore missing data.
Bit errors: The uncorrectable bit errors cause participating disks to bunch of magnetic bits, which lose ability of storing data. Such errors could be analyzed while reading data from disk.
In order to retrieve data from damaged RAID array, you need to go for Data Recovery New Jersey. It is a personalized help delivered by experienced recovery processionals in safe and sterile environment of Clean Rooms using advanced tools and techniques. The experts first analyze the hard drive, repair or replace the damaged components, create image of the disk and then retrieve data from image using proper applications.
Stellar Data Recovery Inc provides Data Recovery NJ for most of the data loss situations. The recovery service is delivered through clean and controlled surroundings of Class 100 Clean Rooms by skilled and experienced professionals. Service is available for RAID, SAN, NAS, IDE, EIDE, SATA and SCSI hard drives.
| Shaun Pattrik has 6 Years of Experience in the Software Technology researching with Stellar Info. system Ltd which offers data recovery, data recovery services, hard drive data recovery, data recovery New Jersey. Article Source: http://EzineArticles.com/?expert=Shaun_Pattrik |
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