Does Time Machine work after a total crash?

[audax]

Is Time Machine useful after a total crash? If my computer dies and I have to do a clean install (or if I buy a new computer), it seems to me that TM will only work if I re-create the exact configuration of folders. Is this the case?

if so, it would seem advisable to have a separate backup volume as well - which is what I do.

 

[jbarley]

If you were to start up from your install DVD, you will be prompted to restore your total system from a connected TM backup drive, if you so choose.
TM will do all thats needed to rebuild your system to the state of the last backup.
You can even choose to restore the system to anyone of all the earlier states that are contained in the backup volume.
If you do regular TM backups, TM will do a good job of keeping you protected and it is very easy for anyone to set up and use.
That being said, it never hurts to have the insurance of another backup such as SuperDuper, which will allow you to create an instantly bootable backup on the same drive as your TM backups.
jb.