RAID drive failed, but SMART shows no errors?

[Alan Cox]

> So, do the 6 rewrites on this drive is an indication of a looming failure? 

Not neccessarily. SMART data is also not always reliable so consider it
an indicator and no more.

> My second question is that the two drives are in a hot-swappable bay, and 
> connected to the Adaptec AIC-7902B U320 controller.  Hardware-wise, the 
> drives are hot-swappable, but what about software-wise?  If I take this 
> drive entirely off RAID-1, cut the power to the hot-swap bay, pull the drive 
> out, replace it, plug in back in, and reenable power, will the FC6 kernel be 
> able to deal with this?

You need to tell the kernel politely first preferably. See the SCSI howto
which I think covers /proc/scsi/scsi and add/removing devices.