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DATA RECOVERY NAS and SAN servers

NAS and SAN data recovery

NAS servers and SAN networks: what are they?

SAN networks and NAS servers represent two types of networked information storage. By pooling storage resources, they are particularly well-suited to the needs of public or professional organizations (companies, local authorities, administrations, etc.).

A NAS(Network Attached Storage), or network storage server, is an information medium installed in a network and primarily dedicated to storing and sharing files between its users. This file server operates autonomously and can only be accessed by client workstations connected to the network.

Network Attached Storage (NAS) is distinguished by the flexibility of its centralized management, a source of numerous advantages:

  • NAS server management and configuration from a web interface ;
  • simultaneous access from several client workstations to the same files ;
  • accessibility rights management (read-only, read/write, etc.) ;

The NAS, whose main component is the hard disk, is highly resistant to data loss:

  • NAS server disks can be configured with a RAID level ;
  • possibility of installing or replacing a hard disk without immobilizing the network ;
  • centralized management and easy scheduling of data backups ;

SAN(Storage Area Network) refers to a network architecture, unlike NAS, which refers to a hardware device. This architecture makes it possible to pool data distributed across separate storage devices. This network of devices can be accessed via dedicated servers, as if they were local drives (or hard disks).

In addition to centralized virtual storage management, the SAN has a number of very advantageous features:

  • high-speed data transfer protocol ;
  • ability to connect heterogeneous servers (Windows, Unix, etc.) ;
  • scalable capacity by adding storage bays or media to the SAN ;

The storage network is also designed for high availability and fault tolerance:

  • hardware redundancy to guarantee network access in the event of failure;
  • SAN integration of RAID systems for data redundancy ;
  • centralized management of backup, restore and recovery operations ;

In addition to their respective advantages, SANs and NAS servers bring numerous benefits to the companies and public bodies that use them: access to a large number of users or client workstations, centralization of files and databases, simplification of systems administration and storage management…

They centralize large volumes and flows of data essential to the activity of a company or public body: secure Internet access, messaging, file sharing, storage of sensitive data… The loss of data or access to data could have disastrous and irreversible consequences: paralysis of the business, loss of sales, damage to brand image…

As shared storage resources, NAS and SAN provide solutions for backing up and securing data: redundancy and replication functions without affecting server resources; network rerouting techniques, hot recovery, data partitioning, and more.

But Nas and SAN are not infallible…

NAS and SAN data recovery

NAS and SAN: data recovery

SAN data recovery and NAS data recovery will be conditioned by the type of storage media making up the shared resource. Whether at the heart of a network or a storage server, in most situations it will be a RAID system…

NAS and SAN failures and data loss

Despite their redundancy and replication functions, NAS servers and SAN networks can fail, resulting in data loss or loss of access to storage resources. Their vulnerability will depend on their IT components and hardware configuration: hard disks and hard disks aggregated in RAID systems, or even SSD disks and any other type of storage medium integrated into the SAN network.

By their very nature, NAS and SAN resources are exposed to the same incidents and failures as any other information storage medium:

  • mechanical failures affecting hardware components (read heads, motor, etc.);
  • electronic faults affecting the hard disk PCB (printed circuit board), controllers, etc. ;
  • logical failures: corruption of the NAS controller, firmware, partition tables, etc. ;
  • disasters: flood damage, fire, lightning, overheating in the server room… ;
  • human origin: ransomware attack, human error, accidental reformatting, etc.
NAS and SAN data recovery

SAN and NAS data recovery procedures

Data recovery procedures will require precise knowledge of the configuration of the NAS servers or SAN networks involved: parameters of failed RAID systems(block size, data block distribution, parity block rotation, etc.), identification of storage units within the SAN network (LUN or Logical Unit Number, LUN masking, zoning, etc.), identification of the NAS file system, and so on.

The operation begins with an analysis of each storage resource to determine which have failed, the nature of the failure, their actual configuration and any traces of error, etc. Our engineers will then make a copy of each of the healthy disks and a clone of the damaged ones. Our engineers will then make a copy of each of the healthy disks, and a clone of the damaged disks, so that the data can be recovered.

After securing the media, Databack will extract and restore the data; rebuild the RAID system, respecting the order of the drives, data symmetry, etc.; configure the SAN network; etc.

La procédure pour la récupération de données NAS et SAN
NAS and SAN data recovery

Databack advice in the event of data loss

Any intervention or attempt at troubleshooting carried out by you in the event of failure of your NAS servers or SAN networks may be irreversible and reduce the chances of recovering your data at a later date.

We offer the following tips:

  • do not work on the server or network after having noticed a problem;
  • do not reset the server or storage array devices ;
  • do not attempt to reconfigure or rebuild the RAID system;
  • do not format a hard disk belonging to the failed RAID system;
  • keep all hard disks and storage media in their original condition;
  • do not reinstall an operating system on the failed server;
  • do not swap hard disks following a disaster, breakdown or failure.

In case of doubt or critical scenario, don’t hesitate to contact our laboratory.

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WHY CHOOSE DATABACK?

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French laboratory

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processes

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24/7
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OUR EXPERTISE

TREATMENT AND DATA RECOVERY

DATA
RECOVERY

Our laboratory enables you to recover data from your storage media, whatever their operating system and configuration: HDD and SSD, RAID system, NAS server, SAN network, virtual machine, encrypted media, etc. We intervene after all types of breakdown (mechanical, electronic, logical) or disaster (flood, fire, electrical damage, etc.).

Data recovery

Incident response
ransomware

Databack responds to ransomware attacks targeting public and private organisations (businesses, local authorities, hospitals, etc.). Our laboratory therefore regularly collaborates with the French CERTs (computer attack alert and response centres) to restore data taken hostage by encryption and restore IS paralysed by ransomware.

Ransomware incident response

Data
migration

Our laboratory can migrate your data onto magnetic tape from any type of media or source system, thanks to the reliability and very high capacity of magnetic tape. We can guarantee the integrity and accessibility of your data as part of your backup, archiving or refreshing operations.

Data migration

Data
deletion

Databack provides you with secure solutions for erasing data from your storage media (HDD, SSD, obsolete or faulty media, etc.). Our methods guarantee reliable and definitive deletion to prevent any attempt to recover your data as part of the redeployment, decommissioning or scrapping of your media.

Data deletion
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