> I tracked the problem down to this difference in the dmesg output of the > bootup sequences: > > 2.6.24-16.30 (Ubuntu 8.04): > > ata1.00: HPA unlocked: 268435455 -> 312581808, native 312581808 > ata1.00: ATA-8: SAMSUNG HM160HC, LQ100-10, max UDMA/100 > ata1.00: 312581808 sectors, multi 16: LBA48 > > 2.6.24.7: > > ata1.00: HPA detected: current 268435455, native 312581808 > ata1.00: ATA-8: SAMSUNG HM160HC, LQ100-10, max UDMA/100 > ata1.00: 268435455 sectors, multi 16: LBA48 Your Ubuntu kernel is clearing the host protected area (the BIOS has marked the end part of the disk as 'reserved' - probably for an XP restore partition), the base one for some reason is not. Set the boot option "libata.ignore_hpa=1". That defaults to zero (respecting the BIOS) so that users don't accidentally blow away BIOS partitions and restore images, except apparently Ubuntu patch it the other way by default. Alan -- 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
