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Fedora, Debian, FreeBSD, OpenBSD, OpenSolaris Benchmarks
Fedora 12 with its EXT4 file-system beat the other operating systems running EXT3, UFS, FFS, and ZFS, but OpenBSD 4.6 did run quite close to Fedora with its four threads of 64MB writes.
Fedora 12 continued its disk performance lead when upping the thread count to 32, but Debian GNU/Linux and OpenSolaris ran closer to this Red Hat Linux distribution.
Switching from sequential writes to random writes, OpenSolaris 2009.06 with ZFS came out the fastest but Debian GNU/Linux and Fedora were less than 1MB slower. FFS on OpenBSD 4.6 was slammed hard on this test while the UFS-based FreeBSD competition was more about three times faster.