broken raid 1 array - I think I messed up

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http://askubuntu.com – I have a big problem with my raid setup. So if anyone is interested, please help... I have a raid1 setup with 2 hdd. One day I saw in the SMART data of one on the disks that it had some bad sectors, so I thought I must replace that disk before it is too late. Following are the trial and error steps that I took and messed up the situation... While the pc was off, I diconected the hdd with the bad sectors and place in the same port a new disk (same model and brand). I entered the Matrix Raid system and as I remember it said something like "One of you disks needs to be rebuilt, do you want to (HowTos)