Re: 1394 Performance

On Tuesday 03 February 2004 23:00, Mark Knecht wrote:
> On Tue, 2004-02-03 at 19:27, James Finnall wrote:
> > Hello List,
>
> Hi!
>
> > The best perfomance
> > I have been able to get using the "hdparm -t" command is about
> > 15 MB/s.
>
> How about hdparm -tT ???

root@Merlin:~# hdparm -tT /dev/sdb
/dev/sdb:
 Timing buffer-cache reads: 128 MB in 0.13 seconds =984.62 MB/sec
 Timing buffered disk reads: 64 MB in 4.57 seconds = 14.00 MB/sec

> None the less, people have commented for a long time that the
> Linux 1394 implementation isn't up to the performance that
> Windows gets from the same drives. I haven't done any comparative
> testing in a long time (maybe 18 months) but when I did I was
> only getting about 40-50% on Linux what I was getting out of
> Windows in the very same drive.
>
> NOTE: testing the same partition meant testing both with FAT32
> which is admittedly not the best Linux can do, but why should
> Linux be *any* slower doing FAT32? I don't know...

Sorry, but I do not have any (at least convenient way) to test the
system under Windows for any comparison.

The only comparison I have is that I was using this entire subsystem
before I upgraded my system. I did not have any reason to even
question the performance. It always appeared to perform like I
expected.

In that regard of before and now, I may be expecting more from the
system than before as well. This issue has become noticable
because I cannot burn a DVD at 4x speed. So then perhaps another
question for the list in general might be, can anybody burn a 4x
DVD on the firewire bus?

James

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Received on Wed Feb 4 14:49:19 2004