We have compiled a list based on several years of experience working with data recovery on RAID systems. Before performing any steps to try to recover data from your RAID system internally, pay attention to these considerations:
Be assured that the procedures to be performed will not make the situation worse than it already is.
In most cases, attempts made by technicians not specialised in RAID systems further complicate the data recovery process. Fatally, some of these attempts could make the data recovery process impossible.
Make sure Backup is up to date. If you don’t have backup, before performing any procedure, the best thing to do is to seek specialised help.
Beware of Rebuild procedure.
Never run the Initialise command. This seemingly harmless command will completely reset all existing data on the RAID, thus making data recovery completely impossible.