RAID data recovery
We would like to specifically separate recovery works for data on disk arrays (RAIDs). Obviously, such high-cost systems are used to store exceptionally valuable information, and blinders when working with them are exceptionally costly.
To avoid data loss from such devices, we always make copies of all disks in an array (at the same time we estimate how each sector on each array disk can be read). All other works are being done only with the disk copies. It is impossible to outline the next work briefly. We will publish a special article on this problem
An advice for those who do not know what to do
if a valuable array felt apart and became unavailable:
don't do anything, bring the array to professionals.
If you can do sector-by-sector copies of the disks by yourself, certainly do that before doing anything else.