i am not the right guy to ask re: working with DV footage. hopefully Multimedia (a member here) will pop his head in and offer an opinion, he knows his stuff.
i do not know how feasible doing a RAID1 with an internal and an external drive is.
well, not internal, just external. Its an older 250 GB FW 400 hard drive. Since I won't be using all that space, I'd like to make that a RAID 1 for extra security on my back ups.