Problem with a slow UDMA100 harddrive

[khny]

The performance of my harddrive (Maxtor 80GB UDAM100) is very slow. Benchmark-tests give me a performance known for regular EIDE harddrive without UDMA. The harddrive, a Maxtor 98196H8 is connected together with a Zip 100 to the primary IDE channel (Windows2000). In the devive manager the current transfer mode for the primary IDE channel is "UDMA if available" and current transfer mode is "PIO mode" rather than UDMA mode like for the secondary channel (here are connected the CD-ROM and CDRW with UDMA mode 2). Is it possible that the harddrive is slowed down by the Zip drive. What can I do to change this?
thanks for your help

[PotatoBoy]

It is quite possible that the ZIP drive is the problem. First of all, are you using a UMDA 100 cable? This cable, while it still has the same connectors on each end has much finer wires, and more of them. If you are not using this cable that is the first thing you should try. Also, what are you using as a UMDA 100 controller, if it is built into your motherboard, which motherboard do you have?

[khny]

I don't think it is the Zip drive because I unplugged it and nothing changed. I think the DMA100 controller is built into the motherboard. The computer is a Dell Dimension 4100 and has the Dell mainboard with Intel 815E PCI Chipset. The BIOS (AMI 586-HiFlex-Bios V23.00) detects a DMA100 cable. Without the right cable it should behave at least as fast as a UDMA33 drive but it is even slower. Suprisingly the BIOS recognizes the drive as UDMA mode 5 drive but in Windows (device manager) it is only used as a PIO 4. Let me know if you need more information.
thanks already for your help!

[PotatoBoy]

I remember reading something about older Non-ATAPI Zip drives causing all sorts of problems. Maybe try putting it on a different IDE channel.

[jonny_boy]

KHNY,

I recently had a similar problem trying to get a DV Camera working properly with computer editing. Turned out to be the cable was not UDMA compatible. The cable I had to use was finer wired and had a blue connector for the mb, grey for secondary and black for primary.

I also read somewhere that if you have a second non UDMA device on the secondary, it will make the UDMA device run slower.

Just some help. It's been a while since you posted so you might have solved it already.

Jon

[ama20656]

Remove everything off the high speed ribbon except the harddrive and have it on one. There are two places to check on the device manager "disc drives" and "hard disk controller" I did not check the DMA box in "disc drives" and wasted over 40 hours and bought another harddrive. It was running at a speed lower than the slowest on the test then jumped beyond everything when the box was filled in. It registered as 5 on the bios all along

<P ID="edit"><FONT class="small">Edited by ama20656 on 03/23/01 22:37.</FONT></P>

[gmooij]

It is already a while you posted yr problem, but anyway... Did you install the right Inteldrivers for your IDE-port? Try this link: http://support.intel.com/support/chipsets/storagedrivers/ultraATA/ It help me perfectly.
Brgds Gert