Hello TrueCrypt 5.0
The third bullet in the update notes:
New features:*
Ability to encrypt a system partition/drive (i.e. a partition/drive where Windows is installed) with pre-boot authentication (anyone who wants to gain access and use the system, read and write files, etc., needs to enter the correct password each time before the system starts). For more information, see the chapter System Encryption in the documentation. (Windows Vista/XP/2003)
*Pipelined operations increasing read/write speed by up to 100% (Windows)
*Mac OS X version
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I installed TrueCrypt on my laptop and ran some benchmark tests.
Benchmark Results:
http://www.full-disk-encryption.net/wiki/index.php/TrueCrypt#Benchmarks
Pros:
1) Easy to use product. Simple clean interface. Amazingly user-friendly!
2) Free and Open Source
3) Multiple Encryption and Hashing algorithm available.
Cons:
1) Buffered Read and Buffered Transfer Rate were almost halved after TrueCrypt FDE was enabled :-(.
2) Access Time for large file (250+MB) increased by 11%.
3) The initial encryption of the 120 GB HDD took 2 hours.