DMA Conflict!

[RavenStandsAlone]

Okay, this one occurred on my primary machine. While running backup to a QIC 3020 tape backup I got the following error message: "An error occurred while writing the backup data. There is a DMA conflict when using this device (08-08-0A-01-1000)"
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On this system I have two HDD; C:, D: and E http://www.sysopt.com/forum/frown.gifa second partition on D http://www.sysopt.com/forum/smile.gif. In the device manager my Exabyte QIC 3020 tape drive has an address "D" (not D http://www.sysopt.com/forum/smile.gif. The error occurred while the backup was in the process of backing up image files on D:\(folder name)\background.jpg

[grandslammer]

Hi!

Click on start, programs, accessories, system tools,system information. Hardware resources, dma. This might give you some insight to what's up.

Mike P.

[RavenStandsAlone]

What is up with this? I didn't put the smiley faces in the body of the text on this message! Somebody want to tell me how someone else edited my message?

[Ygor]

I dunno about the first one, but since the smiley face in the body is created with a combination of : and ), I can see where the second one came from.
"That's an address "D" (not D . The error "

Actually, no I can't. My copy/paste shows a period there with no closing )

Must be a glitch here. Try editing it?

[BEOR999]

sounds like a FIFO error to me !


Single FIFO

With single FIFO, both IDE cables (channels) share one buffer. This means that if any device is active in a single FIFO system, no other device can be accessed or do anything until the initial device has completed its task.

Dual FIFO

In dual FIFO, each IDE cable (channel) has its own, independent buffer. This means that in a dual FIFO system, two devices can be operating concurrently, and will not experience slowdowns or problems as long as they are on separate channels. They each have their own buffer that works independently of the other one.

check the HDD controller in device manager, and check what channel the devices are on.

PS, is this a new device you have added or have you been using it before this error occured
ALSO
The general recommendation is that devices of similar performance modes(DMA or PIO) should be placed upon the same channel. Most IDE controllers do not support separate transfer speeds for the master and slave devices on the same channel. Thus if you have a fast and slow device on the same channel, the faster device will not be able to perform up to capacity.
I would suggest suggest that hard drives should be placed on the primary channel, and slower devices such as tape drives and CD-ROMs or CD-writers be placed together on the secondary channel,Putting your hard drives together on the primary channel and CD or QIC devices on the secondary channel ensures that you won’t likely ever need to access both devices on the same channel at the same time.

[This message has been edited by BEOR999 (edited 01-18-2000).]

[RavenStandsAlone]

This is a device I have been using for quite awhile. The DMA conflict has not shown up in recent uses. Not sure if I reconfigured something since last use or what but the problem seems to have cleared up.
Thanks for the response.
Raven