5 Iridium

RE: Raid - 5 Fail, Can't Run OS

RAID is to decrease the odds of downtime in the event of a disk failure. It is NOT a "backup" in any sense. A backup strategy should always be implemented independent of the RAID array. 

It sounds to me, with a single disk failure, that your data is still there and you simply need to repair your damaged OS, but it just feels like there is too little information on what happened and your config to be able to say that with confidence.

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