On Thursday August 16, [EMAIL PROTECTED] wrote:
> Hello
> 
> During a motherboard upgrade, I did something rather stupid : rewrite grub to 
> the bootsector of my bootdisk ( or so i thought ), but due to the new board 
> and thus a new device order I ended up destroying the beginning of 1 disk of 
> a 6 disk raid5 array. No worries, but after completly zeroing the "bad" disk, 
> i can't add it anymore. 
>  
....
> I get an error, and the following in the kernel log 
> 
>       md: sde has invalid sb, not importing! 
>       md: md_import_device returned -22 
>  

Very odd..
Please report which kernel version and mdadm version you are using,
and the exact sizes of each of the devices in the array (e.g. cat
/proc/partitions). 

Thanks,
NeilBrown
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