Pegasus2 R8 & 8TB drives

Discussion in 'Mac Accessories' started by pjlover, Mar 28, 2015.

  1. pjlover macrumors newbie

    Mar 28, 2015
    Just a heads up to the community (though I do really hope I'm wrong): so far as my testing goes, I can't get the Pegasus2 R8 to recognize the new Seagate 8TB Archive drives (ST8000AS002). The array is set up as JBOD with OpenZFS on top, but the Pegasus Utility crashes once I add an 8TB drive into the mix. 6TB HGST drives work fine, from what I can tell, but I tried two different Seagate 8TB drives, and both had the same outcome. Going back to earlier 4TB or 6TB HGST drives worked fine, though. It's especially odd because the array comes with Seagate drives.

    Any thoughts on something I might be missing?
  2. eljonco, Mar 31, 2015
    Last edited: Apr 1, 2015

    eljonco macrumors newbie

    Nov 28, 2011
    Did you try with the 8TB as only drive? It will show up as non-redundant, but it will at least give an idication of the R8 recognising the 8TB. If you have 2 drives: did you try RAID5? I could imagine a JBOD is more involved than 'regular' RAID5. I'm contemplating a similar (not Pegasus 2, just Pegasus R6) conversion so please do keep us posted.
  3. theSeb macrumors 604


    Aug 10, 2010
    Poole, England
    According to the latest compatibility list, only drives up to 4 TB are officially supported.
  4. Ryanwills macrumors newbie

    Nov 9, 2015
  5. Ryanwills macrumors newbie

    Nov 9, 2015
    Hi there,

    Did you manage to get the 8TB Seagate hdd to work in the promise Pegasus r8?

  6. LeeFB macrumors newbie

    Jan 22, 2016
    So I just got the Pegasus2 unit from another department in my company and they told me that it had been dropped. I accepted it on the hope that I could fix the unit, after some troubleshooting I discovered that the motherboard needs to be replaced. Contacted their help desk and they would not help, stated that they only sold the complete unit, and would not point me in the right direction to purchase a new motherboard for it. Does anyone know where I can purchase a motherboard for the Pegasus2 R8?

  7. Kris Kelvin, Jun 23, 2017
    Last edited: Jul 20, 2018

    Kris Kelvin macrumors regular

    Dec 28, 2005
    I can report that the Promise Pegasus R4 (first version, 4 drive bays) with firmware 5.04.0000.61 is compatible with Toshiba's 8TB N300 disks (Model "TOSHIBA HDWN180"). The drives worked out of the box; SMART values are properly reported in the Promise Utility.

    Initial synchronization for a RAID5 (32TB, 24TB usable) took 36 hours.
    Noise and temperature are within acceptable ranges.
    Performance of a single drive in the Pegasus: 230MB/s read, 180MB/s write
    Performance of a RAID5 (4 drives): 420MB/s read, 640MB/s write

    Screen Shot 2017-06-23 at 17.49.58.png Screen Shot 2017-06-23 at 17.51.19.png

    Update: Everything is still fine after running the Pegasus for almost a year.
    Update 2: Two years in. No problems whatsoever. Rock solid.
  8. GrayJones macrumors newbie

    Jan 25, 2019
    Can you please confirm if this is for a "Pegasus" and not "Pegasus2"? Has anyone tried 8TB N300 drives in a Pegasus2?

  9. Kris Kelvin macrumors regular

    Dec 28, 2005
    I've used 8TB Toshiba N300 drives in both a Pegasus R4 (first Version) and a Pegasus2 R4. The drives work flawlessly in both.
  10. jimthing macrumors 65816


    Apr 6, 2011
    London, UK (Europe, Earth, Space)
    Those Pegasus R-series units sound like jet engines. I had two of the R6's, but had to get rid of them as I couldn't stand the sound of even one of them running anywhere in the same room as my desk.

    I'm currently wondering about getting a new SoftRaid version of the "OWC Thunderbay" 4 or 6-bay enclosures...
    Though, as ever, I have also prepared in case I have to store it at a distance, by using a Corning 10m optical Thunderbolt 2 cable, with a couple of Apple TB3<>TB2 adapters on each end.

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