kernel code). But normaly a real hardware raid is without a doubt faster than a software raid.
Well... Regardless of hardware or software RAID, the kernel I/O limits and the drive I/O limits are the main limiting factor. Hardware RAID mainly helps for RAID1 and RAID5 writes, eliminating duplicate copies of data going across the PCI bus... at the expense of relinquishing control over your data to the hardware RAID's firmware.
A UDMA/133 PATA hardware RAID from a large company I won't mention is quite a bit slower than any SATA software RAID that I've tested...
Jeff
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