On one system, two Raptor 150s: [ 0.739402] ata1.00: HPA detected: current 293044655, native 293046768 [ 0.739491] ata1.00: ATA-7: WDC WD1500ADFD-00NLR5, 21.07QR5, max UDMA/133 [ 0.739577] ata1.00: 293044655 sectors, multi 0: LBA48 NCQ (depth 31/32) [ 0.742454] ata1.00: configured for UDMA/133 [ 1.059146] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 1.061406] ata2.00: ATA-7: WDC WD1500ADFD-00NLR5, 21.07QR5, max UDMA/133 [ 1.061494] ata2.00: 293046768 sectors, multi 0: LBA48 NCQ (depth 31/32) [ 1.064360] ata2.00: configured for UDMA/133 Two disks in a RAID-1 (mdadm) configuration, how come the first one has an issue w/HPA as the firmware of both disks is the same..? l1:~# smartctl -a /dev/sda | grep -i bytes User Capacity: 150,038,863,360 bytes l1:~# smartctl -a /dev/sdb | grep -i bytes User Capacity: 150,039,945,216 bytes l1:~# Why does this occur? Justin. -- 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