Marko Koivusalo writes: > I compiled 2.6.25-rc9 and ran some more tests. > > hdparm -t /dev/sdd > > /dev/sdd: > Timing buffered disk reads: 228 MB in 3.01 seconds = 75.66 MB/sec > > So aparantly read speeds are just fine. However write speeds are still > very slow. > > dd if=/dev/zero of=1gb bs=1M count=1024 > 1073741824 bytes (1.1 GB) copied, 107.068 s, 10.0 MB/s That includes overheads from whatever file system / raid layers you have on top of the device. Please do the dd straight to /dev/sdd or /dev/sdd1. Also, I note that while you have an Intel 845 chipset, your kernel doesn't mention either the local APIC or the I/O APIC. I would have expected both to be present; using them typically results in less IRQ sharing and lower IRQ handling overheads. Might be worthwhile to try to enable them. /Mikael -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
