Leading Data Reocvery Solutions

Delphi-Infotech successfully recovers data from thousands of faulty data storage devices each year.



Network-attached storages (NAS) emerged in an environment with large amount of information as a powerful solution for shared access to a storage. These systems became extremely popular among corporate users where general centralized storage provided for several workstations was required. Being an advantageous solution for data back-up and access from more than one computer, compact NAS devices have gained wide popularity among home users as well.


NAS systems function as file servers aimed at providing location for shared data storage and data access only. They don't conduct any operations, like typical for servers e-mailing, authentication or file management. NAS device consists of a control board providing network access to data and between several disks that can be organized as a RAID-system. This independent device with an own operating system doesn't require any external computer to manage its file system and limits access to its disks. Despite high reliability, NAS-systems are exposed to failures and outages. Software malfunctions, control board failures or simple human errors may result into loss of crucial information. Normally, NAS devices don't provide access to the storage, except for NAS using iSCSI protocols. Thus, to recover data from a NAS to getting disks out of the device and connecting them to a PC for recovery is required. UFS Explorer software, being the most comprehensive solution for retrieval of data lost in NAS, recognizes the latest applied file systems including those of NAS-systems. UFS Explorer RAID Recovery for recovery and RAID reconstruction is in the cases when NAS disks are organized in a RAID-system.


RAID 1 is a popular RAID configuration that mirrors data and provides redundancy in the event of a single hard drive failure. Your Data files are stored and replicated on both hard drives or volumes simultaneously. Two 1 TB hard drives configured as a RAID 1 will store 1 TB of your data and you will have a copy of your data should one or the other of your hard drives fail.


Delphi-Infotech RAID 5 Data Recovery Technical Support Service is available at any time you need. The team has many years experience of successfully rebuilding and recovering data from most RAID 5 failure situations. Restoring data from failed and crashed systems running under all operating system platforms, file systems and suppliers such as DELL, HP etc.
RAID 5 is a popular multi hard disk drive server configuration designed to militate against potentially catastrophic hardware (single hard drive) failure. A representation of the general storage arrangements is shown in the illustration below. The stored data is striped across the drives in the RAID 5 array as illustrated. In the event of a drive failure the system automatically rebuilds, providing service in what is termed a degraded (not secure) mode. Despite its popularity however here at Delphi-Infotech we see a considerable number of such systems that have failed and need our specialist data recovery services.


A RAID 5 data storage system is a multi hard disk drive configuration (Array) of normally 4 x hard drives or above. System data is written to the individual hard disk drives under the control of a specific hardware or software RAID 5 controller. The RAID 5 controller ensures that the system data is written (stored) in blocks sequentially from one drive and then another, this is called striping.
Additional to the primary data each stored data block contains additional propriety parity coding algorithms who’s purpose is to provide data integrity and to facilitate ‘data redundancy.’ The primary system data is broken down into elements called stripes and these elements are distributed throughout the individual hard drive units, the overall data integrity is completed with a separate parity code stripe index. This additional area of parity coding is calculated using the data stored across the disks within the striped volume and is used in the event of a hard disk drive failure to rebuild the data set in full.


Under correct operation a RAID 5 configured system will be fault tolerant to the failure of at least one unit hard drive in its Array. Resulting delays in the auto rebuild process or other common events such as power outages, however, can result in poor maintenance decisions that ultimately leave the RAID Server unable to rebuild.
Recovering such a failed RAID 5 involves reconstructing the original data striping and the associated parity fields. Here at Datlabs we have a specialist RAID recovery team on hand to help with all aspects of a RAID 5 failure, rebuild and recovery that can reunite you with your lost data.

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