RE: 1394 Performance

> > 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

Humm...interesting results. As I said I haven't done any of this in at least
18 months now, but the buffer-cached value looks really high, while the
buffered disk read is probably about right in my experience. As I recollect,
I got numbers in the 10-15MB/S range for my FAT32 drive under Linux, while I
could connect the same drive to Windows and calculated much faster transfers
by moving large files and measuring times.

Not an apples to apples comparison, but I don't have hdparm under Windows...
<SNIP>
>
> Sorry, but I do not have any (at least convenient way) to test the
> system under Windows for any comparison.

No need to be sorry. It's just an opportunity to see what the drive is
capable of on a more mature 1394 stack.

>
> 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.

That in itself is interesting. My expectations have always been a bit dashed
WRT performance.

>
> 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?
>

Humm....I had intended to do this, but I placed my new DVD drive in an
Oxford 911-based case and it wasn't even recognized by the 1394 stack on my
Gentoo box, so I installed it as an EIDE internal drive.

Maybe I should try again? I don't have the money right now to drop 100 bills
on a new case and have it not work. (Just upgraded my audio to 18 channels /
96KHz. Money all gone...

- Mark

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Received on Wed Feb 4 20:57:25 2004