Oh!? I'm using encryption on all my essential books since my MBAir had been stolen......But do realise that because filevault is essentially an encrypted sparse disk image you cannot expect consistent recovery of drive space.
If you delete say 1GB of data you are not going to immediately get 1GB of space back. You may not get all of that 1GB back. ...
You can also recover disk space by using a terminal command or zeroing free disk space using Disk Utility.Oh!? I'm using encryption on all my essential books since my MBAir had been stolen...
On PPC the user folders are encrypted separately - FileVault2 encrypts the whole disk.
As far as I understand, the encrypted user's container is reorganized during the log-off prodedure, since this takes it's time. So until that moment disk-space is blocked, even if the trash had been emptied...
The only PPC Mac on which I use File Vault is my Quad at work, and I would say that the performance impact is negligible if at all present.
As mentioned, in Leopard when you log out or shutdown the computer you will get a "recovering disk space" progress bar that will take anywhere from a few seconds to few minutes to complete depending on how much disk writing you've done in that session.
It's also worth mentioning that FileVault encryption is somewhat dated by current standards. My work requires all computers(whether personally owned or university owned) that store "sensitive" information to be encrypted. FileVault 2 meets their standards, while FileVault doesn't. For that reason, I don't keep student information or other protected records on my PPC systems despite FileVault being enabled. I try to keep using PPC Macs as much as I can at work, but little things like this unfortunately keep pushing more of my workflow toward Intel Macs. The Quad has been getting a workout this week, though, as it has some software for which I don't have an Intel version.
It's more convenient to have the whole user-account/home-directory encrypted instead of thinking about each single file.Do you have a reason to encrypt your entire home directory or would an encrypted disk image work just fine?
I'm not against it, but if you don't have to encrypt everything, why do it?