I have just broken out of vmware for some fde testing on typical hardware and had a shock. I am going time how long it take for fde on a couple of different spec laptops to give users an idea what it will take, anyway I booted my old samsung x10..
1.6ghz centrino 768 ram 20gb c partition on ide disk
nearly 5gb used including swap and hiberfile, basic windows xp with itunes only really and no other user data
fde on c is barely 5% through (though it is progressing) after 50 minutes
also the estimated time is bouncing wildly betweem 7,8,9 hours and some random amount of minutes
also I had the auto synch set to 1 minute from some other testing I was doing and this seemed to prevent fde from ever getting going, it said it was and the times were randomly bouncing but after 10 minutes no progress, I changed to 600 minute synch and manually synced and it's gotten going as above.
the samsung was top of the range in 2005 but this is what a lot of our users will still have 4200rpm 2.5" ide drives, 512ram etc.
my mistake was I assumed fde would only encrypt used space and somehow mark free space so it was encrypted when written.
anyway, the 160gb usb hdd I had connected is currently being encrypted, I didn't expect this as it is a removable device. it is even shown as a removable drive in the device properties in the EEM with selectable encryption so why would the client start encrypting it?
I was planning to select the automatically encrypt all drives fully option but will have to rethink this if the software doesn't recognise all removable devices as such sad
My advice here is to ignore whatever the status bar says. If you sync when 75% through, it appears to start from 0 again. However, the disk still encrypts in the expected original time. The time left is usually a reasonable indicator of how long it will take, older machines can sometimes take forever, and if you have a dead sector, the time will go wild for a while!