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Hard drive (DMA100) question... help!

S

SOS

Member
Hi,

I need to know if it's worth getting a motherboard that supports DMA100. If you have a 7200 DMA100 HD on a motherboard with ULTRA/ATA-66, and the same HD on a motherboard with ULTRA/ATA-100, will there be any speed difference in the HD?

I've read that the bandwidth with ULTRA/ATA-66 is already plenty large enough to handle the throughput, so there will be no speed difference. Is this true?

Thanks

SOS
 
The speed difference will mainly show up in burst transfers. Most of today's 7200 RPM drives won't notice much, if any, difference between ATA66 & 100.

Viper GTS
 
The IBM 75GXP is the first drive to take on the ATA33 limits. Drives nowadays will be just fine with ATA66. But if you have cash for a i815E or KT133 w/ onboard controller, why not? I also heard that drives perform better with the onboard ATA66 than controller ATA100.
 
I had this same question awhile back.
The 75GXP is the fastest drive out there right now, it can 'sustain' a data transfer rate of 37MB/Second. Still well below the 66MB/Second transfer rate that can be achieved on the ATA/66 controller.
As Viper GTS pointed out, the only benefit of the ATA/100 would be in burst transfers, meaning you'd get up to 100MB/sec transfer rates when writing data to the 2MB cache on the 75GXP. You probably wouldn't see any burst data reading from the drive though since the controller (ATA/66 or ATA/100) would be able to keep up with the data coming off the drive, so the cache wouldn't ever fill up and 'burst' on a read operation.
To net it out, the current benefits of ATA/100 seem to be minimal and you probably wouldn't be able to tell any difference. However, if you have the ATA/100 controller, you're well positioned for the future. Eventually, there WILL be a device that can overrun the ATA/66 and make the ATA/100 the preferred choice.
 
Intersting review. The question now is would I get the same type of performance from the onboard highpoint ATA100 controller that comes with the ABit KT7-RAID?

Thanks

SOS
 
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