Interesting results! I noticed that the 1TB SSD did seem to suffer when you went from multi-threaded to single-threaded. Was this a SATA-attached or USB-attached SSD? And any insights about why the SSD seemed to require threading for better performance when using readaead? - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html