FreeBSD 5.3b7and poor ata performance

[fandino]

Kris Kennaway wrote:
>>OpenBSD 3.5:
>>dd if=/mnt/aa of=/dev/null bs=1024k count=1024
>>1073741824 bytes transferred in 18.743 secs (57287584 bytes/sec)
>>
>>FreeBSD 5.3rc1:
>># dd if=/mnt/aa of=/dev/null bs=1024k count=1024
>>1073741824 bytes transferred in 42.215597 secs (25434719 bytes/sec)

> BTW, others have asked that you not use dd as your "benchmark",
> because it's not benchmarking anything relevant for real-world use of
> the disk.

I posted the results of bonnie++ tests two days ago. (fbsd2.txt and obsd.txt
at the bottom)

http://lists.freebsd.org/pipermail/freebsd-current/2004-October/040567.html

also I did copies of large mpeg files (sequential read) which were a
real pain to process because disks were very slow (as slow as dd tests).

I will do all tests that you need to demostrate the problem, just tell
me which test you want to do.

Now, I'm waiting to Søren. He is the one who can find a bug like this.

Regards.