Data Recovery After RAID 5 Failure

RAID 5 is one of the most primarily used implementations of RAID. This array provides data striping at byte level with distributed or interleave parity. Due to availability of stripe error correction information, RAID 5 is a high performance and fault-tolerant system. But a RAID 5 array might break down. It might occur due to failure of one or more disks. To restore lost data in such cases, you should consult Data Recovery Service experts.

Data Loss in RAID 5

RAID 5 array is not lost upon single hard drive failure. While it occurs, you can calculate any consequent reads from the distributed parity. This is possible if the disk failure is masked from the user. Data from RAID 5 array is lost when the second drive fails. The array remains vulnerable to further loss until you replace the drive and rebuilt the data thus lost.

A RAID 5 array loses data if the data and parity information become unsynchronized due to system failure. This particularly occurs because the system fails to determine the status of write at the time disk failure took place.

Since RAID 5 supports holding parity information, single disk failure results no loss of data. If an extra disk is available, data reconstruction will begin immediately after failure. However, loss of two hard drives at the same time results into complete data loss.

RAID 5 Recovery

RAID 5 Recovery is quite complex because parity is distributed across the drives. Also, different RAID cards and software use different algorithms to generate parity stripes. Parity blocks are created using different sizes of blocks of data, which are then spread across the entire array. The parity disk thus obtained rotates based on a particular algorithm. The procedures involved in data recovery services for RAID 5 is inclusive of various complexities like finding the offset, if any and finding the stripe size.

Data Recovery NJ is available for all levels of RAID, be it of any complexity. There are different reputed data recovery companies that provide this service. Such companies have advanced tools, high-end techniques, Clean Rooms facility and experts who have years of experience in dealing with failed RAID arrays.

Stellar Data Recovery Inc. is a trusted data recovery company providing comprehensive, best and secure Data Recovery NJ. Equipped with Class 100 Clean Rooms and advanced recovery technology, the company is known for delivering complete results. It caters for all types of hard drives of Desktop, Server, SAN, NAS, Laptop and RAID.

 

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