On Saturday November 15, jim@jimtreats.com wrote: > raiddev /dev/md0 > raid-level 1 > nr-raid-disks 2 > nr-spare-disks 0 > chunk-size 4 > persistent-superblock 1 > device /dev/hde1 > raid-disk 0 > device /dev/hdh1 > raid-disk 1 Would I be right in guessing that hde1 is a master, but hdh1 is a slave (though on different busses)? That's kind of an odd configuration. You could try turning of DMA on the drives (hdparm ...) and see if you still get corruption. If you don't, the finger point very much at the IDE controller... NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html