RAID stands for Redundant Array of Independent Disks. It is one of the best storage technology that combines multiple disk drives into single logical unit. This extreme technology is designed to address the fault tolerance and performance limitations of disk storage. It enhances the capacity and performance of logical drive beyond the limitations of single physical drive. Data is distributed across the drives depending on the level of redundancy and performance using different “RAID Levels” available namely RAID 0, RAID 1, RAID 2, RAID 3, RAID 4, RAID 5 and RAID 6. Each and every level is provided with advanced features when compared to older levels. All the RAID levels employ an error protection scheme called “parity”. It provides fault tolerance in the given set of data.
Let’s go through some prominent features of RAID 5 level. It is one of the most popular RAID levels and has achieved more popularity due to its low cost, high security and performance. It requires minimum of three drives to implement it. RAID 5 uses (Block- Level Data Stripping with distributed parity) technique.
Note: Stripping is a data storage scheme where logical data is segmented and stored across multiple devices. Segments on different devices can be accessed concurrently so it reduces the waiting time of the processor and provides faster data access.
RAID 5 level strips the data and parity bits across the disks hence all the disks carry both the parity and information. The array is not destroyed by single drive failure since it calculates the subsequent reads from the distributed parity upon drive failure. However single drive failure results in reduced performance of RAID array until the drive is replaced and associated data is rebuilt. Many people prefer RAID 5 partitions because of its enhanced performance. But this partition is also prone to data loss under certain circumstances. In such cases you need to use best third party application like partition recovery tool to retrieve files from partition.
Some common data loss scenarios from partitions:
Usage of Unreliable third party applications: Using pirated or cracked third party applications for formatting, re-formatting, resizing the hard disk partitions may delete the partitions.
Master Boot Record Corruption: MBR is the main data structure element to access hard drive partitions. MBR is the first sector on the hard disk that identifies how and where the operating system is located so that it can be boot in to computers main storage. If MBR which holds the partition table gets corrupted due to virus infection, frequent power outages or MBR code overwritten by some program then all the created partitions will be lost. Sometimes entire hard drive becomes inaccessible on account of MBR corruption.
Overloading the system with multiple commands: A user may issue multiple commands at a single moment this could cause the partitions to simply disappear. In such cases the computer disk manager shows either unallocated space or flashes strange unreadable messages on the screen.
Saving data on to Phantom: Partitions collapse when the data is saved on to “Phantom” volumes or free space on the disk. This happens when the user try to save lot of data on to the hard drive and the data if the storage capacity of the drive is less compared to amount of data to be stored then the drive is unable to save the data on to real partitions and it creates unreal partitions or phantom drives which do not exist.
Installing defective software: Installing corrupt or defective software may corrupt and infect the partition finally leading to loss of entire partition.
Accidental formatting: Sometimes it happens that you accidentally format the partition containing important files while on the verge of formatting some unimportant ones. For instance consider a situation where you need to format Local Disk (D:) with unimportant data. But while selecting the partitions for formatting you have accidentally selected Local Disk (E:) with important files. In this case formatting never shows any mercy on the user and wipes out all the data stored on that partition and creates a new file system. However, you can employ this software to get back lost data from formatted Mac hard drive of different types like SATA, SCSI, IDE, etc of numerous manufacturing brands like Western Digital, Seagate, Hitachi, etc. Fot detailed information on Mac hard drive data recovery, visit here http://www.partitionsrecovery.com/hard-drive-mac.html.
Irrespective of the reason responsible for loss of data from RAID 5 partitions you can always get back the data with the help of partition recovery tool. This tool is equipped with advanced features to retrieve data on Windows 7 after partition table corruption. It recovers data from non-booting Windows partitions or volumes of Windows Vista, Windows XP, 2003 and 2008 OS based computers. This risk free software is provided with built in advanced algorithms to locate and recover lost partition files from formatted Iomega HDD with simple mouse clicks. It can recover different types of files from hard drives, flash memory cards, Fire Wire Drives, External USB drives based on their unique signatures. It has extraordinary feature which allows you to add or edit the signatures of non listed files. It can recover data from WD hard drive along with other hard drive brands like Hitachi, Fujitsu, Imation, Maxtor, Samsung, Seagate, Sony and many more. Download and install the demo version of the software to evaluate the performance of the software. You can preview recovered files after the completion of recovery process. If you are satisfied with the recovery results purchase the software to save recovered files to secured location. This application can also be used to recover unmountable partitions from you Mac system.
Tips to reduce rate of partition corruption:
- Always keep the back up copy of the partition data in order to avoid data loss and save it on relaible external hard drive so that it also helps you to recover files from damaged hard drive easily.
- Use best anti virus applications to scan the system in order to avoid data loss due to virus.
- Never use unreliable software to perform any operations on partitions.
- Use UPS to avoid voltage fluctuations leading to unintentional system shut down.
Steps to recover data from RAID 5 partition:
1: Download and install the program on your PC. After launching the program select the option "Recover Partitions/Drives" from the Main screen as shown in Fig 1. In the next screen select "Partition Recovery" option to recover data from the partition.
Fig 1: Select Recover Partitions/Drives
2: On the next screen, just select the RAID 5 partition from which files are to be recovered as shown in Fig 2.
Fig 2: Select Drive
3: Now, scanning will start and after finishing, recovery result will be shown on the next screen as shown in Fig 3. Preview recovered files and save them to secured location after purchasing the software.
Fig 3: Recovered Files