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Very slow disk to disk copy on Gig 7dxr

By sgg ·
My Gigabyte 7dxr motherboard may be one of the first motherboards to be released into the distribution channel. My revision level is 0.2

In most respects it has performed quite well, however there have been numerous anomalies having to do with the IDE channels. I have spent a substantial part of this morning diagnosing a situation where I have been plagued by extremely poor performance when copying a hard drive from the primary IDE channel to the secondary IDE channel, (referred to as IDE one and IDE two on the GB mainboard). It is my practice to you use drive cloning software, (ghost, drive image, and bootit have all been used during this diagnostic process with equally poor performance).

Last night I set two identical IBM deskstar disk drives cloning from one to the other. The drives are 45 GB in total capacity and around 35 GB was in use. These are almost new ATA 100 disk drives that should be capable of fine performance . This 35 GB process took eight hours at an average speed of 67 megabytes per minute!

A short while ago I set these drives up on the promise controller which had been put into ATA 100 mode , (not a raid controller). One of the drives had a 40 wire cable so it was not even running an Ultra DMA mode and yet the average transfer rate was almost 700 megabytes per minute , just about ten times as fast as the two drives ran when one was primary master and the other was secondary master.

My primary question is, "Why is the disk-to-disk transfer so slow from primary ide master to secondary ide master?

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Very slow disk to disk copy on Gig 7dxr

by csmith In reply to Very slow disk to disk co ...

There are two common reasons for this.
The OS may have defaulted back to transfering one sector at a time, (a Windows problem) and the BIOS may be in a low PIO Mode.
In your case the BIOS is the most likely, because the Promise IDE Controller has its own BIOS which bypasses the Motherboard BIOS.
The first test would be to force the Motherboard BIOS IDE Transfer Mode setting to PIO-4 instead of using auto.
Regards, Chris

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Very slow disk to disk copy on Gig 7dxr

by sgg In reply to Very slow disk to disk co ...

With identical software, it is possible to clone disks at much higher speeds on an intel chipset mainboard. This seems to be an issue with the VIA chipset. The resolution of the issue is unknown to me at this time.

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Very slow disk to disk copy on Gig 7dxr

by GIJoe In reply to Very slow disk to disk co ...

Is this still a problem?

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Very slow disk to disk copy on Gig 7dxr

by sgg In reply to Very slow disk to disk co ...

The question was auto-closed by TechRepublic

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Very slow disk to disk copy on Gig 7dxr

by Yacco In reply to Very slow disk to disk co ...

On a master/slave setup on an IDE channel, only one drive at a time can do anything. The master has priority, any call for it moves it to the active drive. What happens is: source drive gives up a chunk of data, pauses, destination drive receives the data, pauses, source drive has to seek next data chunk, read it, pause, etc.. That's one of the reasons to use scsi drives on servers as they can move multiple data streams and operate multiple drives simultaneously. With IDE, if you want to operate 2 drives simultaneously they must each be on their own channel.

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Very slow disk to disk copy on Gig 7dxr

by sgg In reply to Very slow disk to disk co ...

The question was auto-closed by TechRepublic

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Very slow disk to disk copy on Gig 7dxr

by sgg In reply to Very slow disk to disk co ...

This question was auto closed due to inactivity

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