I have full system encryption set up with TrueCrypt across an internal SSD and a 7200rpm drive, as well as two external hard drives (both Western Digital, the drive in question is a WD Elements 3TB). All drives are encrypted using the same password.
My issue is that one of my external drives (incidentally the "backup" drive), always gets dismounted when I put my computer to sleep. This is bad because I'd like the computer to wake up at 4am, log on, mirror all drives to the backup drive, go back to sleep). However, when I wake the computer up manually all drives are still in decrypted state except the backup drive, where it prompts me for a password.
What could cause this? Can I somehow prevent that particular drive from being dismounted upon logoff/sleep? All "auto-dismount" and "hibernation" options in TrueCrypt are turned off and it works just fine for all other drives.
I realize this is not the most secure way but I'd prefer this setup.
Thanks!