jmc@nospam wrote:
> Is there any reason to go to the trouble to make sure my 750 Samsung
> and seagate Hds are enabled for for Sata II speeds?
>
> From what i've read so far you may have problems with some
> motherboards and only a RAID would get anywhere NEAR needing that
> speed. (of sata II).
>
> My Hds are only listed as moving data at about 100 MB/second.
>
> I do move and encode Gigs of video.
>
> I just built my Quad 9450 and it process data at 49+ meg/second.
> with 78% cpu use. (dvd shrink-analyze option)
>
> My old AMD 4200 X2 @ 2600Mhz only does 18 meg/second
> and 100% cpu use.
>
> Looks like I'm not cpu bound anymore but
> my new Hds should be able to move data faster then 49meg/second ???
>
> On a straight Hd to Hd transfer a Gig will take maybe 12 seconds.
>
>
> Thanks,
> jmc

There are a couple benchmarks here. They test sequential access across
the disk surface. A disk is faster at the beginning, than at the end.
The benchmark should give a curve. These should be read-only tests.
(The purchased versions may offer read and write tests.)


(right column - select the read-only version)

If your software does a lot of seeks (lots of head movement of any
significant distance), that will impact the average transfer rate
achieved.

The first one of these, sold on Newegg on May 28. This is the latest
10K RPM SATA drive.

300GB and $1 per GB.


Transfer rate 123MB/sec down to 74MB/sec at the end of the disk.




So benchmark the existing drive, and see where it sits in the scheme
of things.

While a 150MB/sec cable transfer rate sounds adequate, there is some
overhead in the packet format. So the actual achieved max transfer
rate, will be less than 150MB/sec. I don't know if that would prevent all
of the VelociRaptor performance, near the beginning of the disk, from
being used or not.

That drive is kinda small, and there are plenty of other ways (RAID) to
construct a higher performance solution.

Paul

<jmc@nospam> wrote in message
news:

> I want them to come out with SMALL high speed
> solid state disks. 4-8 gig raid 0 for my OS drive!
> (Might be able to afford couple of thoses!)

They are called flash drives. Trouble is that common flash memory tops out
around 6 megs/sec DTR, which is about 1/10 the speed of a modern hard drive.