> Last time I asked, people thought 4200 v. 5400 wouldn't really matter for a
> USB drive. Any other views?
>
>From the HGST site:
drive RPM media transfer rate
7K60 7200 518 Mbit/sec
5K80 5400 450 Mbit/sec
4K80 4200 350 Mbit/sec
Now, I have NO idea how well the IDE/USB2
interface does in the external boxes. The
interface from the drive is capable of 100
Mbyte/sec but the drive can't keep up with
that so the media rate is the limit given
a computer or device on the interface that
can do 100 MBytes/sec sustained.
I think that the max rate of USB2 is supposed
to be 480 Mbit/sec so it appears that the
7200 RPM drive might be able to saturate
a USB2 interface while a modern 4200 RPM
drive could not. That of course assumes
that the USB2 box/adapter/computer can
do sustained read/write at that rate.
If you could notice the difference with a notebook
is another matter. I have read that the USB2
interface is not a efficient as Firewire so some
operations over the slower (400 Mbit) Firewire
connection run in less time than the nominally
faster (480 Mbit) USB2. That probably also depends
on how well the USB2 and/or Firewire adapters are
designed ...
Stuart
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Received on Tue Mar 9 14:13:17 2004
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