qpress is a portable file archiver using QuickLZ and designed to utilize fast storage systems to their max. It's often faster than file copy because the destination is smaller than the source. It supports:
multiple cores, reaching upto 1.1 Gbyte/s in-memory compression on a quad core Xeon
64-bit file sizes and tested with terabyte sized archives containing millions of files and directories
pipes and redirection and *nix-like behaviour for scripting and flexibility
Adler32 checksums to ensure that decompressed data has not been corrupted
data recovery of damaged archives with 64 Kbyte grannularity
unbuffered disk I/O (Windows only) to prevent disk cache of other applications from being flushed