You guys are going to love this one... I have ripped most of my hair out because of this bug and can not track down the problem! When ever I build my new array I looses a disk in slot N. So, a bad disk? Move that disk to a different slot in my drive cage, rebuilds just fine. New disk in slot N fails... Bad cable? Replace the cable to slot N... Drive in slot N still fails. Get mad at drive cage. Get new drive cage... Same slot "N" in new drive cage fails... Bad controller card? New controller card. So I have now replace the drive, drive cage, cable, controller card... I am going mad. My mother board has 4 onboard SATA ports, I have never had a drive fail on any of those 4 ports... Concept test. Took 4 "Failed" drives and installed them in the 4 slots the connected to the onboard SATA's... build array. The array built in record time, and built at 50MB/sec! 4 disk array works fine? Ok, try test 9 more times, just to be sure. Never once did the array fail during building or testing in the 4 drive/onboard state. What is wrong with my controller cards! I can connect them to any one of the drives in my array, to any slot in the cage and watch that drive fail... The drive(s) never fails at the same stop. All disks now have over 1000 error in the SMART Logs !@#$. All the exact same error: Commands leading to the command that caused the error were: CR FR SC SN CL CH DH DC Powered_Up_Time Command/Feature_Name -- -- -- -- -- -- -- -- ---------------- -------------------- 35 00 f8 08 08 00 e0 00 00:06:26.949 WRITE DMA EXT 35 00 f8 08 08 00 e0 00 00:06:26.907 WRITE DMA EXT 35 00 f8 08 08 00 e0 00 00:06:26.866 WRITE DMA EXT 35 00 f8 08 08 00 e0 00 00:06:26.824 WRITE DMA EXT 35 00 f8 08 08 00 e0 00 00:06:26.782 WRITE DMA EXT My NAS's hardware. AMD Athlon 64 3000 1024MB DDR400 Foxconn 6150K8MA-8EKRS Motherboard Off brand 6X SATA drive cage 6X MaxLine 300GB SATAII 7200RPM Hard drive. Promise SATA300 TX2plus controller card Silicon Image, Inc. SiI 3112 controller card Any ideas? -Adam - 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