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Sometimes a single disk drive fails and the operator installed a new drive in its place and starts a rebuilt.At this point the RAID 5 now has 2 bad drives which render it totally inaccessible. The defective hard drive was NOT replaced and the RAID 5 continued to operate in a degraded mode until a 2nd hard disk failed. One drive of a RAID 5 array failed 4 months previous.However, the failure of one drive can cause the RAID to start rebuilding itself and if another hard drive in the array fails even momentarily during this process, data can become inaccessible.
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RAID 5 is created to allow the failure of one hard drive with no loss of data. PHYSICAL ISSUES – One or more of the hard drives in your server, RAID box, SAN or NAS are NOT functioning properly. Examples of file system damage on RAID arrays include: Accidental deletion One can think of the file system as a large index containing the location and order of all the parts of data that make up a particular file.
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The operating system whether Linux, XFS, MAC or Windows, uses the file system to locate the data on the RAID array. The RAID data cannot be accessed because of damage to the file system.
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LOGICAL OR SOFTWARE ISSUES – All of the hard disk drives that make up the RAID array are functioning properly. However there are two distinct categories of data loss that will require RAID data recovery services. Losing access to the data on your RAID array can happen for a number of reasons. RAID Data Recovery Services, What causes data loss?
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If you must play, do what the professional do, and image all of the Server or RAID disk drives. No one wants to pay for something they could have done themselves, but if the data is “life & death” we recommend bringing it to us asap. We understand IT professionals prefer to resolve their issues in-house or with the support of the original manufacture. Whether you have a failing SuperMicro SAN box running 72 6TB hard drives, or a 2-drive WD external hard drive using RAID 0, we have the expertise and resources to repair the defective hard drives, decipher the original RAID parameters, virtually rebuild the RAID array, and reunite you with your valuable data, quickly and efficiently. RAID arrays are used in most enterprise servers including SAN and NAS devices as well as finding favor in many consumer products.