Re: USB external hard drive???


"Bernie Dwyer" <b_duibhirz@xxxxxxxxxxxxxxx> wrote in message
news:47C22890.ADEC1873@xxxxxxxxxxxxxxxxxx
Steve King wrote:

<snip>

I can only give you anecdotal experience. On a MAC system with FCP
(Final
Cut Pro) external 7200 rpm IDE drives work flawlessly using IEEE 1394
connection. A similar drive in a USB2-only enclosure frequently
glitched,
which is to say an error message was generated indicating that write
errors
occurred. We only tried the USB2 enclosure for video once, then went to
Firewire hook-ups exclusively for professional work. Was it the
computer?
Was it the NLE software? Was it the enclosure and drive? Don't know. I
have always heard that USB2 measures faster than IEEE1394 for typical
burst
file transfers; however, IEEE1394 is faster at sustained large file
transfer. On the other hand I use USB externals for audio all the time
with
never a problem. I have also used USB externals for simple video editing
on
my PC running Vegas without problems.

Steve King

Amen, brother - I've used Sata and IDE hard drives in external
enclosures, both USB2 and 1394 connections (only on Windows PCs, not
MACs). In general, I've noticed that USB2 suffers frequent failures when
copying large files, or large numbers of small files. I tried to backup
a Premiere Pro project and its associated footage files (a couple of
large AVIs, plus lots of smaller files ranging from a few KB to over
300MB - all up, more than 80GB data) to an external drive over a USB2
connection and it repeatedly failed with write cache errors. Switched to
a 1394 connection and it worked first time.

I'd say that USB2, on my machine at least, has a faulty driver
somewhere.

--

Bernie Dwyer
There are no 'z' in my address

Microsoft has an unsupported fix for this, that sort of works. Search their
knowledgebase for USB2 write cache errors. You have to ask them for it, but
it's reduced those errors on my laptop to almost nonexistent.

mg



--
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.

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