Slower write speed with ZFS RAID-Z compared to linux RAID5

Discussion in 'Storage' started by flawl3ss, May 6, 2012.

  1. flawl3ss New Member

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    flawl3ss, May 6, 2012

    I recently redid my file server and removed Ubuntu with ext3 and software RAID5 with which I was able to get 85 MB/s writes over Samba and put FreeNAS 8.0.4-RELEASE-p1 64-bit. My write speeds over Samba with FreeNAS are now 23-30 MB/s using a RAID-Z configuration. Could this be a configuration on my end causing this or is it simply the ZFS implementation in FreeBSD that's the cause? What are some things I can do to narrow down what is causing the significant write speed difference?

    Here are some hardware specs that may be relevant...

    RAM: 4 GB DDR2
    CPU: 3.0 GHz AMD X2 6000+
    Hard drives: four Hitachi 1TB
    Free space: 399 GB of 2.9 TB
    NIC: Onboard nVidia - nfe0: <NVIDIA nForce MCP77 Networking Adapter>
  2. flawl3ss New Member

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    flawl3ss, May 6, 2012

    Slow write speed with ZFS RAID-Z [resolved]

    Turns out the problem is with the lack of support for the nForce/Realtek chipset which is causing the slow transfer speeds across the network. I put in a supported Intel NIC and my speeds are back to normal!

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