>>> I have a WD Elements 2TB USB hard drive. I would like to >>> encrypt the whole drive with TrueCrypt on my CentOS box. >>> Could someone direct me to a tutorial on how to do this? >>> Ideally, I would also like to access it with my WinXP box, >>> but this part is optional. >Last time I checked I was searching for whole disk encryption for OS-X >and TrueCrypt does this only for Windows. Probably a semantics issue, op wanted a drive to access from two OS's, so whole drive enc in form of the partition that has data is likely the only need as I presume he doesn't intend to boot from it. Also, it's a USB drive, so again not likely needing to boot from it...