Missing Superblocks

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Good-day All
I "have" an array RAID6 6drives 1 spare. The OS got corrupted on reboot.
On a fresh install the array is non detectable. Investigation shows that out of the 6 active drives only the first one has a valid super block the rest look to be corrupt. My assumption is that this might be down to the fact that I raided on raw drives /dev/sdX and not on partitions /dev/sdX1. Is this recoverable or should I load from a backup? I assumed trying to create using --assume-clean should work but currently the only drive with a super block shows as busy except it is not mounted.
Many Thanks
John Atkins



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