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Activity Forums Apple Final Cut Pro OT – Slow Raid

  • OT – Slow Raid

    Posted by Don Walker on April 16, 2017 at 9:47 pm

    Not really an FCPX problem, but since I’m familiar with the people here, I’ll throw it out.

    2012, 27″ iMac, i7, 32GB ram, etc.
    OWC USB 3, 12 TB Raid

    I use this raid to edit for the church I work for. 10 days ago we took 2 massive power hits, that ended up trashing 2 of the discs in the drive, and because it was RAID 5, I lost all my data. (Masters, and raw footage stored on other drives) I bought a new set of disks and installed them Friday.
    The raid has a hardware controller, and I initially set up as Raid 3 and ran the Blackmagic speed test on it and got 42MB/sec…… about 1/6th the speed I expected. I set it up Raid 5, same speed, Raid 0, 42MB……. I changed cables, ports etc, with the same results. I tested other drives (example, off the shelf SSD in a USB 3 enclosure) and got 220MB/sec.

    I then connected the Raid to a 11″ MacBook Air (Baby Mac) with USB 3 and got USB 3 speeds.

    In summary. iMac reads the Raid at USB 2 speeds, but sees other drives as USB 3, but a laptop reads the Raid at USB 3 speeds.
    OWC is stumped, I’m stumped.
    Does anyone have any ideas?

    don walker
    texarkana, texas

    John 3:16

    Doug Metz replied 9 years ago 3 Members · 2 Replies
  • 2 Replies

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