>From wikipedia, PCI is 133 MB /s (32-bit at 33 MHz) 266 MB/s (32-bit at 66 MHz or 64-bit at 33 MHz) 533 MB/s (64-bit at 66 MHz) Not quite the 3GB/s hoped for. But how fast do drives themselves tend to be? I rarely see above 80-100MB/s, although my drives are just consumer-level 7200RPM ones - nothing brilliant. Most cheap drives max out at around 100MB/s and for general use 50-70MB/s. You probably don't have a 33MHz PCI system, 66MHz was standardised at PCI 2.1 IIRC, and that was a long time ago. 64bit is available on PCI-X only, and you'll see the difference easily. PCI-X also has 100MHz and 133MHz systems, which is nice. Real-world performance for 8x1TB in RAIDz2 is likely to be good anyway, even with old PCI Best regards roy
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