saving RAIDframe parity accross a panic

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

> So I just go another panic on the file server:
> 
> raid1: IO failed after 5 retries
> raid1: IO failed after 5 retries
> raid1: IO failed after 5 retries
> /export/mail: got error 5 while accessing filesystem
> panic: softdep_deallocate_dependencies: unrecovered I/O error

I'm just wondering what if that really had been an actual I/O error. Then,
I would have lost the RAIDframe parity because of the panic, and probably
not have been able to re-write it because of the I/O error.

Is there any decent way to save the RAIDframe parity on a panic?