So an interesting test with “XBench”:http://www.xbench.com/ on disk speed. Since I’m using an older MacBook circa early 2007 for video processing, its interesting to compare the drives all of these are with 4KB blocks
| | Score | Sequential Write | Sequential Read | Random Write | Random Read |
| Internal 5400rpm Fujitsu MHW2160BHPL | 35.95 | 43.98MBps | 10MBps | 0.99MBps | 0.44MBps |
| eSATA 7200rpm Seagate ST375064 | 44.92 | 51.56 | 14.33 | 1.08 | 0.59 |
| USB 2.0 7200rpm Hitachi HUA721075KLA330 | 23.92 | 6.05 | 1.79 | 0.70 |
So, you can see that buying a $40 eSATA controller (I got the Rosewill 605) is worth it. It is about twice as fast as USB 2.0 at least on sequential read and writes. The random without cache is an interesting benchmark, but really random depends quite a bit on caching (that’s the main purpose as most reads aren’t really random).