Hmm..
Technically RAID 1 is only useful to keep your system running in the event of a disk failure until such time you can shut it down to replace it (unless hot swap of course). Crashing when one disk fails is something that should not happen.
RAID 1 is not a substitute for backups either as a power spike, software problem or user error can result in data loss...
As I use a laptop I only have a single drive and that backs up to a hybrid RAID NAS device (4 drives, same protection as RAID 5 where you can lose a single disk, but can upgrade the capacity by a single disk at a time which you can't with normal RAID 5).
I also have a separate USB drive that plugs into the NAS unit and the important stuff (music, photos, movies) are backed up to that for off-site purposes. Although truth be told I don't get around to that very often...
If I could justify another similar RAID box I could leave it at another location (eg parents house) and the software on mine would backup over the net to it which would be v cool...
http://www.synology.com/enu/products/DS411j/index.phpBut... glad you didnt lose your data!