When you connect a scsi to a PC via the scsi card the PC should see the drive as a normal drive attached to the PC and the TL.projects will be in folder. If the PC is not seeing the drive at all the drive may have died. Have you tried connecting a good drive to check if there is a scsi problem with the PC? Also do you need to have the active terminator in the system the way you have it connected to the PC?
I have had this can't see a drive problem with secondhand drives that I have bought and it is usually a format problem, but if this drive was working it's more of a puzzle.
And are there any when this is on?: I meant when the hidden file setting is on do you see any files at all?
I bought the Acronis Disk software : Which one did you get? With the disc director it is possible to check the formatting and to format a stubborn drive, but if disc director can't see anything it looks bad for the drive.
Wish I could help more, I know how frustrating this can be.
One last thing it could be, although some of the symptoms don't add up, if a drive has not been low level formatted in a long time you get a build up of project folders, these are not deleted even if you do a low level clean up, when there are too many folders the drive can refuse to mount or be very long mounting.
Alan.