NO !!!!
I hope you didn't have anything on them you needed.
That seams to be a common problem with novice using dd. If you were to open my units up you would find that all are labled with date installed and position. I do it will all pc's. So if I have a drive problem I know pretty quick if it's in warranty.
Your only option would be to use a image file. Apparently you were not in RAID 1.
Do you know what version of the OS you were at?
At least one was 3.4.805 and greater to support 160gig drives.
It should be Mandatory for all multiple drive snaps to run be in redundcy, Raid 1 or 5.