Multiple Encrypted Drives - Single Password Entry

[Rendrago]

My apologies if this has been posted before, but I could not find the answer.

I used the alternate CD to encrypt the system drive. I used cryptsetup to encrypt one of my storage drives. When I boot my system, I'm asked for my encryption pass-phrase for the system drive and then again for the one encrypted storage drive (both have the same pass-phrase). I have two more storage drives that I plan on encrypting.

Is there a way to only have to enter the pass-phrase once for all four encrypted drives?

[hyper_ch]

I wrote a howto for using keyfiles to uncrypt other than root partiton. It's in the tutorials section.

[Rendrago]

Found it:

http://ubuntuforums.org/showthread.php?t=837416

Thanks!