Hi there, Something which I've been having trouble understanding is why my PIII's seem to perform better with the p5_mmx checksum than with the pII_mmx. Here's my results from dmesg: raid5: measuring checksumming speed raid5: MMX detected, trying high-speed MMX checksum routines pII_mmx : 1544.193 MB/sec p5_mmx : 1617.726 MB/sec 8regs : 1259.205 MB/sec 32regs : 661.416 MB/sec using fastest function: p5_mmx (1617.726 MB/sec) Should I be concerned? Is this just one of those things? I've reproduced this on all the PIII-based machines I maintain. Corin /------------------------+-------------------------------------\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027 | | Commerce Internet Ltd | Tel: +44 (0) 20 7491 2000 | | 22 Cavendish Buildings | Fax: +44 (0) 20 7491 2010 | | Gilbert Street | | | Mayfair | Web: http://www.commerce.uk.net/ | | London W1Y 1FE | E-Mail: [EMAIL PROTECTED] | \------------------------+-------------------------------------/