Hard Drive Encryption and RAID 5

[nachamiyahu]

I was wondering if there was a way to encrypt a software RAID 5 array. If so, are there any disadvantages?

 

[JeauxBleaux]

I was wondering if there was a way to encrypt a software RAID 5 array.

You can encrypt any data on any drive or array of drives. Try truecrypt. -> http://www.truecrypt.org/

If so, are there any disadvantages?

Forgetting your password can be a huge disadvantage...

 

[Nothing_But_NAS]

There is also dmcryp/LUKS.

Disadvantages:
In addition to pass phrase issue, performance hit and you OS incorrectly recognizing an encrypted disk as not formatted are the two other major concerns.