On Sat, Dec 22, 2012 at 12:07 PM, Roy Sigurd Karlsbakk <roy@xxxxxxxxxxxxx> wrote: > WD2001FASS >From the stuff the wd runs max 138 and the hds runs max 163...assuming you are using the outside tracks on both, inside tracks can be 2x slower (less data). I would make sure they are both running the same sata speed, if a sata/ide port gets errors sometimes it drops the speed and retries at the slower speed, and generally once it throttles down a reboot is required to undo it. look at hdparm/sdparm (which works depends on distro) and smartctl to see what you can pull about the disks. -- 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