RAID DATA RECOVERY

Data Doctors Data Recovery can restore or recover your RAID, SAN, NAS, Snap Server, and many others. We run terabyte capable servers to tackle the larger RAID'S that arrive here for data recovery.

Utilizing custom software and hardware solutions, Data Doctors Data Recovery is the ONLY choice for your vital data. Don't be fooled by companies that offer on-site or worse, remote recovery options. Before any utilities are run against a RAID, all the disks must be cloned sector by sector. Anything other than that is an accident waiting to happen. Just one foul up and ALL your data can be lost. We have recovered RAID's that have been at many of our competitors labs. DO NOT SEND YOUR ARRAY TO ANY COMPANY WITHOUT VERIFYING THEIR CAPABILITIES.

In this day and age, there are more and more companies utilizing large storage units. There is NO data recovery company that has the experience of working with storage devices that our company has.

What a RAID (Redundant Array of Independent Disks) is:

RAID 0:

All the disk devices are organized alternatively so that blocks are taken equally from all disks alternatively, in order to reach higher efficiency. Since the probability of finding a block of a file is identical for all disks, there are force to work simultaneously thus making the performance of the Meta disk almost 10 times that of a single disk.

RAID 1:

In this mode, the goal is to reach the highest security of the data. Blocks of data are duplicated in all physical disks (each block of the virtual disk has a duplicate in each of the physical disks). This configuration provides 10 times the reading performance of a single device, but it degrades writing operations. Read operations can be organized to read 10 blocks simultaneously, one from each device at a time. Similarly when writing 1 block it has to be duplicated 10 times, one for each physical device. There is no advantage in this configuration regarding storage capacity.

RAID 4:

In this mode the ultimate goal is to balance the advantages of the type RAID0 and RAID1. Data is organized mixing both methods. The physical 1 to N-1 are organized in striping mode (RAID0) and the Nth stores the parity of the individual bits corresponding to blocks 1 to N-1. If any of the disks fails, it is possible to recover by using the parity information on the Nth hard disk. Efficiency during read operations is N-1 and during write operations is 1/2 (because writing a data block now involves writing also to the parity disk). In order to restore a broken hard disk, one only has to re-read the information and re-write it (it reads from the parity disk but it writes to the newly install hard disk).

RAID 5:

This type is similar to RAID 4, except that now the information of the parity disk is spread over all the hard disks (no parity disk exists). It allows reducing the work load of the parity disk, that in RAID 4 it had to be accessed for every write operation (now the disk where parity information for a track is stored differs for every track)