While the RAID system overall makes it possible to optimise data storage by distributing it over several hard disks, each configuration has its own advantages. RAID 1, which mirrors data, is especially recommended for those who are primarily looking for security.

RAID 1 or RAID 0?

The RAID 1 system is probably one of the simplest. It works on the principle of mirroring. In other words, the disks in the cluster are organized in pairs. On each pair, the information is written and read simultaneously. In short, RAID 1 has perfect redundancy, which benefits data security.

The RAID 0 which, along with the RAID 1 is one of the most used systems, allows for an excellent distribution of writing data on several disks, but without redundancy. RAID 0, also known as stripping, allows access to several disks at the same time, which reduces the transmission time, therefore, gaining performance.

So, RAID 1 or RAID 0? RAID 1 provides you with a lot of data security, while RAID 0 has great performance. The choice will depend on your needs.

RAID 1 applied to an external hard drive

RAID technology is usually used on an internal hard disk, but it is quite possible to apply this system to an external hard disk. There are commercially available enclosures specifically designed to accommodate multiple hard drives. Compatibility with RAID systems is always indicated.

Because of the simplicity of the RAID 1 configuration, you will find external hard disk enclosures compatible with this system available to buy. After configuration, the benefits remain the same: the application of RAID 1 on an external hard drive provides maximum security through mirrored backup.

RAID 1 or RAID 5. Which one to choose?

Thanks to mirroring, RAID 1 meets security requirements. If RAID configuration is possible with only 2 disks, a minimum of three disks is required to create a RAID 5. This system combines the RAID 0 striping and the RAID 1 parity system.

The RAID 5 makes it possible to divide and distribute the data on several disks, but thanks to the parity system, the user can recover all data if a disk fails. The RAID 5 offers a double advantage: performance and security, making it a great storage system.

How to install a hard drive in RAID 1?

To install a hard drive in RAID 1, first, make sure your PC is compatible with this system. If you haven’t already, install a second hard drive to create the system. This second hard disk must be SATA type (Serial-ATA-ATA for Advanced Technology Attachment) with the same capacity as the first disk. A SATA cable and a Raid SATA controller will also be needed to install your RAID system.

The installation of a RAID system presents no risk but as a precaution, do not hesitate to save your data beforehand. Install the second disk and activate the RAID in the Bios. Download and install a RAID management software and finally, duplicate the data from your original disk on the second freshly installed. If a drive fails, you will continue to work normally, except that you will be notified of the failure.

Can we have a NAS server in RAID 1?

The answer is yes. As a reminder, a NAS or Network Attached Storage is a stand-alone storage unit. It is accessible from a local network (private or professional), but not only. This technology also allows the sharing of any type of data (video files, audio, photos).

You can access files from any device on this network. To answer the question of the compatibility of a RAID with the NAS server, it is indeed possible, for the sake of data security, to apply the RAID 1 system. The data will be distributed on several hard disks with a writing in parity, which guarantees the security of your information.

In any case, whether you use RAID 1, 0, 5 or your NAS has this system, data loss can occur. In this case, Ontrack has the expertise, experience, and advanced logistics to recover your data safely.

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