Here's a question for people running software raid-5: do you get significantly better read speed from a raid-5 device than from it's component partitions/hard drives, using the simple dd test I did? Knowing this will help determine whether something is funny with my set-up and/or hardware, or if just had unrealistic expectations about software raid performance. Feel free to reply directly to me if you don't want to clutter the list. My dumb script is below. Thanks, Dan #!/bin/sh dd if=/dev/sda8 of=/dev/null bs=1M count=900 > /dev/null 2>&1 for f in sda7 sdb5 sdc5 sdd5 ; do echo $f; dd if=/dev/$f of=/dev/null bs=1M count=300 2>&1 | grep bytes/sec echo; done dd if=/dev/sda8 of=/dev/null bs=1M count=900 > /dev/null 2>&1 for f in md2 ; do echo $f; dd if=/dev/$f of=/dev/null bs=1M count=300 2>&1 | grep bytes/sec echo; done - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
