The basics of data recovery

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Storrage technologies

Virtual machines
Virtualization technologies are very popular these days. Almost every office with an IT-infrastructure uses virtual machines. So, what is a virtual machine?
Different RAID levels and chances of data recovery, storage interpretation as part of a RAID, precautions during manipulations with disks organized in a RAID.
Popular NAS: the ways to bypass data loss, using network disk for saving your data.