Amandeep wrote:
[... dmesg snipped ...]
A Eric Anderson wrote:
Amandeep wrote:
Hi all,
I am using Tyan S2098 MB with 160GB Maxtor ATA Drive and the transfer rate is very low. FreeBSD 5.3-Release.
Any ideas what is going on here.
The transfer rate is about 15MB/s
when I run #dd if=/dev/zero of=/usr/junk bs=8192
then do #iostat 1
You should probably provide the appropriate information from dmesg output, along with what you expect it to be, and the outputs of the dd command.
Eric
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Hi,
I had practically the same problem, i.e. the same very low ATA write speed, with very similar hardware (ASUS P533-E, same chipset and CPU as yours). This occurred with both 5.3-STABLE and 5.4-STABLE.
I found that the problem disappears when I disable atapi_dma in the loader (or with 5.4, do not enable it). Alternatively, I can use "atacontrol mode 0 UDMA100" to force the ATA channel for the harddisk to UDMA100. I do not know why this works though, I still need some closer investigation. Something weird in the ATA driver must be going on.
Anyhow, my HDD (WD-1200JB) is up-to-speed now, -45Mbytes/s reading AND writing.
Kind regards,
Hans
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