I've had external disks supporting all of firewire, usb and eSATA for a while now, but only recently got a machine supporting eSATA (as well as the two others). I was previously preferring firewire over usb, for good reasons:

• usb: Timing buffered disk reads: 84 MB in 3.01 seconds = 27.89 MB/sec
• firewire: Timing buffered disk reads: 112 MB in 3.00 seconds = 37.33 MB/sec

But I didn't expect this 3 years old disk (possibly more, I don't remember precisely) to perform that well over eSATA:

• eSATA: Timing buffered disk reads: 216 MB in 3.01 seconds = 71.88 MB/sec

(All results as given by hdparm -t)

Interestingly, smartctl is unable to gather the vendor specific SMART attributes when the disk is attached on eSATA, while it can when on usb.

2010-09-25 17:26:45+0900

p.d.o

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