All About RAID’s & Server’s

RAID/Server Data Recovery

Most companies today rely on their main servers to house sensitive information regarding their business operations and to maintain client data.  As such, the logical or physical loss of such data can have dire consequences and ultimately financial implications.

We have successfully recovered files and encrypted data for accounting systems, PST files, Formatted hard drives, with mechanical problems (customer accidentally dropping on the floor, System failure, partition loss and other mission-critical, proprietary data.  Using a sophisticated cleanroom environment, your recovered data will not be compromised in our dust-free and temperature controlled facility.

Companies entrust us to safeguard and recover their valuable data from their operating systems and other high-capacity devices.

 

RAID’S and SERVER’S

RAID 0

Any member commonly referred to as Stripping. A minimum of two drives is needed to form a RAID 0. Information’s are split through the member drives but no redundancy is saved. A defect of the component drive will lead to percentage loss of data. It is faster and space efficient but has as a greater risk of data recovery and data loss when one of the disks failed

JBOD

As the name indicates it has no mirror or striping characteristics. In fact JBOD array is made of two or more physical drives re-arranged on one single disk volume.

 

RAID 1& RAID 3

RAID 1

Has a set of two or more disk volumes where the data are exactly a copy of one another, the advantage is that is good for data storage, but it has disadvantage of been too expensive.

RAID 3

It’s is very similar to RAID 5, with three or more disks except the parity is assigned to a single drive. The difference between RAID 3 and RAID 5, the stripe size is dispersed at the byte level, rather than block level.

Raid 5

Known has distributed parity, with a set of 3 or more disks with all the data dispersed across all the drives in array of stripes. Since there are different types of Raid’s and Raid 5 has a form of redundancy. The advantage of having raid 5 mean when any problems occurs or one of the disks fails, it is possible to recover the data from the missing disk as the parity is resolved from the remaining set of working disks.

So instead of a stripe been stored on single drive it’s is distributed across all drives in array, one of the great advantages of having RAID 5 it’s an array of less expensive disks compared with RAID 0 for example. The disadvantage in using it depends on the type of configuration, for example when the data is written all the stripes are added up.

The negative side of the RAID’s 5 it can cause some overheads problems on the controller for the pc or server

To recover any type of RAID’s we have to analyse the disks the following Disk Order, Parity Distribution, and Block Size.

Disk Order – Is to find out the right order of each disk is positioned in order to have access to the working data

Starting offset – Is to determine the correct location where the sector 0 starts on array of disks

Block Size - It is important to find the right (block size) stripe size on any RAID array

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