Archived from groups: alt.comp.periphs.mainboard.abit (
More info?)
Richard Hopkins wrote:
> "Edward Diener No Spam" wrote in message ...
>
>> I bought tow larger hard drives for myself, both advertised as Ultra
>> DMA 133, and put them off of my raid controller. Yet when I look
>> in my controller's setup screen it shows them as Ultra DMA 100. My
>> previous smaller drives show properly as Ultra DMA 133.
>
>
> In actual performance terms this makes precisely ah heck all difference,
> so ultimately it's not worth losing sleep over.
OK, no sleep lost <g>.
>
>> Does anybody have any idea why the raid controller does not see them
>> as supporting the 133 speed ?
>
>
> Are you sure they're UDMA133 drives? The only manufacturer who makes
> drives supporting this standard is Maxtor.
I am probably confusing two things. What is the difference between "Ultra DMA
133 MB/sec" and "Ultra ATA133" ? The two new hard drives I bought, "SAMSUNG
SpinPoint P Series SP1614N 160GB 7200 RPM IDE Ultra ATA133 Hard Drive - OEM" is
listed as the latter in the NewEgg web site description.
>
> If they are Maxtors, then the likeliest reason for not running at "full"
> speed is because this mode is disabled by default. Download the
> appropriate feature tool from Maxtor's website and see if you can enable
> it.
>
> If the drives *aren't* Maxtor, then they were advertised falsely.
> However, it is unlikely to be worth doing much about as the chances are
> that the drives you've bought actually perform better than the Maxtor
> equivalents.
The two smaller hard drives I have originally were Maxtor's, listed where I
originally bought them, as "Maxtor DiamondMax Plus D740X 6L040L2 40 GB Ultra
ATA/133". The Maxtor drives show up in the raid controller as ATA133 while the
Samsung drives show up as ATA100.
This bothers me very little but I wanted to understand the difference vis-a-vis
what the raid controller sees.