What is Back-up and Recovery?
A good back up is crucial in a business environment, a back-up strategy is the most effective and efficient way to protect your vital data. It provides a safeguard against unexpected data loss and application errors; should you lose your original data, you can use the backup to make it available again.
With the rise in cybercrime and malicious viruses and malware plus, the potential of accidental data loss, backing up and storing your data has never been more important. A company should always have a disaster recovery plan to deal with potential disasters, a plan to ensure the continuation of regular functions. By backing-up the effects of a disaster will be minimised and the organisation will be able to either maintain or quickly resume mission-critical functions.
The Different Types of Data Back-ups
Full backup –
It is a method of backup where all the files and folders selected will be backed up. When consequent backups are ran, the integrated list of files and will all be backed up. The advantage is data restores are fast and easy to manage as the full list of files and folders are in one backup set. It is also easy to maintain and can be restore in various forms.
However, backups can take some time as each file is backed up repeatedly each time it is ran which can consume a considerable amount of network resources. This method absorbs the most storage capacity compared to incremental and differential backups. The exact same files are stored repeatedly which results in inefficient use of storage.
Mirror Backup –
As the name states a mirror of the source being backed up. With this backup a file in the source is deleted and that file is eventually deleted in the mirror backup. This technique is clean and ensures the backup does not contain old and out-of-date files. But, there is a chance that files in the source are deleted accidentally, by distribution or through a virus.
Incremental backup –
This is when once the initial full backup is completed consecutive incremental backups runs – it will just save the data that has been changed since the last backup, making it much faster backup than a full backup. The incremental technique is quicker and consumes less network resources. It also provides adequate use of storage space as files are not duplicated unlike the full backup method but, restores can be slower and more complicated.
Cloud Backup –
This is also known as Online Backup and Remote Backup – it is when data is backed up to a service or storage facility connected over the Internet. A form of offsite backup so, if anything happens to the premise like a fire or a natural disaster, the data is safe in a different location. The data is also replicated across different storage devices, usually serviced by multiple internet connections so the system is not at the point of failure and it provides easy backup accessibility with an internet connection. If the service is provided by a good commercial data center, the data will be managed and protected. The downside is it can be more expensive than local backups and the backup and restore times can be dependant on the availability of network bandwidth. Also depending on the service provider the owner of the data may not always be in full control of your files i.e. determine which datacenter the data is stored in or there may be security risks involved such as other people viewing your files especially if it’s not encrypted.
Offsite Backup –
This is any backup where the backup storage medium is kept at a different geographic location from the origin is known as an offsite backup. For example, an administrator storing the data onto a tape drive and then take it to another location. Cloud backup is also a form of Offsite backup. It gives a company a peace of mind because if a disaster was to strike at the office like theft, fire, flood, earthquakes, hurricanes and more, there is a backup offsite to recover from. However, it may cost more because usually rotation between several storage devices is required. Another disadvantage is storage devices are not always reliable and often needs to be replaced because the more frequent handling of storage devices, the risk of damaging the delicate hard disk is greater.
For more information on the different types of backup and a discussion of our services please feel free to call us on 0845 603 5552.