Ultra ATA/66 versus Ultra ATA/33 Comparison
May 16th, 2000
While we are not trying to downplay the need for the Ultra ATA/66
standard, we do think it needs to be looked at for what it is: a
standard, not a performance booster. While the implementation of the
Ultra ATA/66 standard does offer slight performance gains in current
drives; these gains are mainly due to the burst transfer rate of data,
and not the sustained transfer rates. If the requested data happens to
be in the cache memory of a hard drive, this data can be transferred
in bursts at up to 66 MB/s. This “burst” transfer of data provides a
boost for business type applications, where the odds that your next
requested block of data has already been pre-loaded into the drives
cache are greater.
If your application requires more data than can be fit into your hard
drives cache, or if the data requested is not preloaded into the cache
memory, then you drives data transfer rate will drop down to the
actual physical media transfer rate. Currently, this is below the even
the 33 MB/sec of the Ultra ATA/33 standard, although some of the newer
drives are fast approaching this threshold. In everyday use of your
computer, you will most likely encounter a combination of the above
two scenarios, so although you will notice a slight performance gain,
it won’t be quite as dramatic as the advertising on the box makes it
out to be.
http://www.anandtech.com/showdoc.html?i=1237
Ifølge ovenstående artikel fra 16/5 2000 kunne harddiskene på det
tidspunkt ikke køre hurtigere end ata/33 hvis ikke dataene lå i
harddisk cachen.
Jeg tør ikke sige om de nyere harddiske kan køre hurtigere end ata/33
når dataene ikke ligger i harddisk cachen.
On Sun, 14 Jul 2002 17:07:00 +0200, "Michael Nielsen"
<michael@mnielsen.dk> wrote:
>Jeg tror ikke det er disken der er den begrænsende faktor.