tuning disk on 3ware /performance problem

Chuck Ebbert (76306.1226@compuserve.com)
Sun, 6 Apr 2003 11:29:00 -0400

> Is there anything i can do to tune the drives connected to he 3ware
> controller ? (37MB/sec vs 43MB/sec) (and why is the seq. output block
> 65MB/sec on the 3ware vs 41MB/sec on 'ide controllers')

Try doing a real test with a 1 GB file on an empty filesystem:

# mount /fs && date
# time dd if=/dev/zero of=/fs/file1 bs=128k count=8k
# umount /fs && date && mount /fs
# time dd if=/fs/file1 of=/dev/null bs=128k

I get numbers that disagree with hdparm by a large amount.

--
 Chuck
 I am not a number!
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/