Re: Bad 3ware 9000 performance 5.4?

From: Lamont Lucas (lamont_at_cluepon.com)
Date: 05/20/05

  • Next message: Martin Nilsson: "Re: Bad 3ware 9000 performance 5.4?" 
    Date: Thu, 19 May 2005 21:43:06 -0700
To: Alexis Yushin <alexis@ww.net>

    On Fri, May 20, 2005 at 05:13:32AM +0200, Alexis Yushin wrote:
    > Running FreeBSD 5.4... three machines with twe/3ware 8000 and three twa/
    > 3ware 9500-8 controllers. All of them running RAID 1+0 without write cache
    > since we dont have battery backup unit. All of them Seagate 7200 SATA.
    >
    > I get about 46Mb/s write on the 8000 series and only 5(!)MB/s on the 9500 series.

    I recently ran some tests with large sequential writes on a stock
    5.4-RC? machine with 4 400GB seagates and a 3ware 9500-12MI. In those
    tests I got roughly 90 MB/s write on a large raid0 stripe and 66 MB/s
    on a raid5 setup. I also do not have the battery backup unit.

    Tweaking the stripe size away from the default made only minor changes.
    I was also only using a 32 bit pci interface as the motherboard I
    was testing with didn't have a 64 bit slot.

    I made no changes to the kernel and even let newfs run with the defaults.

    That was just a proof of concept run for the larger 9.6 TB 2 9500-12
    raid that I'm building tomorrow. I'll let you know if I run into similar
    problems to yours with multiple cards. 

    -- 
 - Lamont
"I am not an atomic playboy."
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  • Next message: Martin Nilsson: "Re: Bad 3ware 9000 performance 5.4?"