Date: Tue, 17 May 2005 22:34:23 +0200 From: Hans Ottevanger <hansot@iae.nl> To: Amandeep <aman@chamkila.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Low HDD tranfer rate with FreeBSD 5.3-Release Message-ID: <428A554F.8010203@iae.nl> In-Reply-To: <427FAB5F.6070508@chamkila.org> References: <427FA802.90805@chamkila.org> <427FA8CD.8040405@centtech.com> <427FAB5F.6070508@chamkila.org>
next in thread | previous in thread | raw e-mail | index | archive | help
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 >> >> >> > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to > "freebsd-hackers-unsubscribe@freebsd.org" > 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?428A554F.8010203>