Hi, I got it fixed by removing ATA_FLAG_PMP from the SIL24_COMMON_FLAGS. Could someone turn this into a module option? The external raid case might in fact has a built-in port multiplier, but the case can only be configured as raid0 and raid1. I suspect that Linux tries to to access the drives separately, which fails. -Tobias -- 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