Drive Seagate ST1000LM024 HN-M 1TB hdparm -t /dev/sda Timing buffered disk reads: 316 MB in 3.02 seconds = 104.78 MB/sec Drive Western Digital Technologies, Inc. My Book Essential Edition 2.0 (WDH1U) 1TB hdparm -t /dev/sdb Timing buffered disk reads: 92 MB in 3.01 seconds = 30.52 MB/sec