A quick opinion on ULTRA DMA 100 Controllers
I will get some more info up soon on IDE drives but first I need to voice my opinion on the latest and greatest Ultra DMA 100 controllers. I considered buying one but I thought first lets see how much performance I should gain. The maxtor drives are usually some of the fastest ever built so I’ll use their best drive to prove a point. The fastest Maxtor drives available to my knowledge are the performance series: Maxtors' DiamondMax Plus 45 Family 3.5" EIDE / Ultra DMA/100 Drives Model Numbers 54610H6, 54098H6, 53073H4, 52049H3, 51536H2, 51369H2, 51023H2. The media transfer rate on these drives is a maximum of 49.5 MB/Sec. Now common sense took over here- If the drive could only read at 49.5 MBits a sec, what good what a controller that runs at 100 MBits do? Well the truth is that it does nothing at all, we are not even maxing out the 66 controller! There are a few exceptions.
- Exception #1 The data being retrieved is small enough to fit into the buffer on the hard drive itself. In the case of the above Maxtor drive, there is a 2 meg buffer so if you kept requesting that same file that was less than 2 meg, you might see a performance boost.
- Exception #2 If you utilize RAID 0 ON SEPERATE CHANNELS you could get close to utiilizing the full 100 MBit. Using RAID 0 on drives on the same channel causes some problems because the IDE cable has to carry the data from both drives along with the timing signals.