RAID – What You Need to Know Protect Your Data from Disaster

RAID 6 – What You Need to Know Protect Your Data from Disaster

As you probably know RAID 5 offers you protection from a single hard disk failure. Most people would assume that RAID was the ultimate level of data protection, that level of protection would be sufficient. However in my experience if one disk in the volume has failed chances are it’s due to old degrading media and the chances of a second drive failing during the RAID rebuild are fairly high. So if your going to have a RAID array its best to have multiple stripes of parity and I still suggest you get some online backup to add that extra protection. Nothing is worse than loosing your data. Data loss is costly and extremely stressful. Hard Drive Recovery is not something most people want to deal with. Especially when think they have been protected with a RAID server and dual parity stripes

RAID 6 Data Recovery Write ProcessRAID 6 is similar to RAID 5 but not always in that it eliminates some of RAID 5′s major drawback of the single parity stripe by allowing you two parity stripes. Using RAID 6 you can easily sustain two simultaneous disk failures before you really need a RAID recovery service. By adding the additional parity stripe you do have the added protection but you also have additional overhead on the processor.

 

RAID 6 offers a second parity stripe. Two parity stripes are not always better. The reason for doing all of the calculation to enable this dual parity system is that the second parity stripe gives us an added layer of redundancy. This helps to ensure that even if the data on the failed hard disk is lost, the second parity stripe will ensure the integrity of the data on the RAID server.

If there is a second disk failure the entire rebuild process fails and you dealing with a RAID data recovery situation. With RAID 6, after the first device fails the device is running as a RAID 5, deferring but not removing the problems associated with RAID 5. When it is time to do the rebuild, all the RAID 5 choices and rebuild penalties remain. While RAID 6 adds protection, it does nothing to alleviate the performance penalty imposed during those rebuilds.

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Western Digital Green Hard Drives

WD Green Hard Drive Recovery

WD Green disk failure seems to be a common problem. The term “failure”, when applies to a hard disk drive, can indicate one of many problems that result in the drive being rendered unusable. This potentially catastrophic occurrence can sometimes be caught in time to prevent total loss. Being able to recognize symptoms of an imminent crash is crucial.

Data Recovery

Head failure problems are famous with Western Digital WD Caviar Green hard drives, like any other hard drive manufacturers. Heads are located inside the drive and are responsible for reading and writing the data to the actual media. If theses heads heads become damaged or weak the result is that you are unable to access your data. If the heads in a hard drive fail you will need a Hard drive Recovery service. Firmware located on the service area on the platters in a hidden manufacturer area is also another common point of failure. For some reason if one or more modules get corrupted the hard drives becomes inaccessible. If you attempt to access drives with firmware corruption, you will probably hear a continuous clicking sounds form the heads. You may see  S.M.A.R.T or other BIOS errors. It is not possible to fix these errors by attempting the data recovery yourself. Specialized equipment and processes are required. Recovering data from Western Digtal WD Caviar Green hard drives with firmware corruption requires specialized tools. Therefore, it is recommended to use a professional data recovery company to fix hard drive problems.

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