Solved: External Hard Drive Transfer rate

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Rebel38668

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Quick Question...Hopefully quick answer.

I have a 160gb external hard drive. Using USB 2.0. When I transfer something from my C: drive transfer rate is around 15mbps. But when I transfer something from my D: drive (second hard drive, set as a slave on same IDE channel) the transfer rate is only1.5MBps. Anyone know why I get such loss in transfer speed.
 

crjdriver

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HD to HD should have a faster transfer rate. Check device manager and see if your hd are running in dma mode.
 
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your second HD is prolly running on a slow cable or you have a slower transfer rate on your board, not a problem really, it will just take longer to move your large files
 

Rebel38668

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Thanks for the DMA suggestion. When I look in device manager. I try to change it to DMA if possible but the transfer stays on PIO. Any suggestions on how to get that changed. Since, just manually changing it doesn't work.
 

crjdriver

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Since modern drives average around 40 mps, I would think you have some issue either chipset drivers are not installed, incorrect transfer mode selected, incorrect or old style cable, etc.
 

crjdriver

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Rebel38668 said:
Thanks for the DMA suggestion. When I look in device manager. I try to change it to DMA if possible but the transfer stays on PIO. Any suggestions on how to get that changed. Since, just manually changing it doesn't work.
You have found your problem. I would guess you have not installed the chipset / mb drivers or an incorrect 40 wire cable is being used.
 

Rebel38668

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The PC I have is pretty new. It is a Dell Dimension 2400. Only about 2 years old. I would really like to get this fixed. Any ideas on ow to fix the chipset drivers. Transfer mode on Device 0 and Device 1 are DMA if available. Device 0 Current transfer Mode is Ultra DMA Mode 2. Device 1 Current transfer mode is PIO only. There is no drop down box to change current transfer mode to DMA. Any help is appreciated.
 

crjdriver

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Does the drive in question use an 80 wire cable? You can tell because the cable uses color coded connectors; blue to mb, black to master device, and gray to slave device. If your cable has all gray ends, you are using a 40 wire cable and you will need to swap it if you want dma speed.
 

Rebel38668

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Yeah the drive uses three black connections to mobo, master, and slave. I have changed it to blue to mobo, black to master, and grey to slave. I am still working on it to see if it will go into DMA mode on device 1. Will let ya know what happens. Thanks again!!
 

Rebel38668

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Okay, I am getting frustrated. I have reinstalled the drivers for the chipset on a Dell Dimension 2400. I have changed the cable from mobo to master and slave. And it still tells me that the current transfer mode is PIO on device 1. Any other ideas?
 

Rebel38668

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Just wondering if it could be because my second drive is a 200gb and my mobo might not support that? Could that be the case?
 

crjdriver

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Yes. Have you checked dell's site for any bios updates that address large hd?
 
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