USB 3.0 external SSD speed problems

Discussion in 'Mac Accessories' started by Mac Hammer Fan, Jun 3, 2019.

  1. Mac Hammer Fan macrumors 6502a

    Mac Hammer Fan

    Joined:
    Jul 13, 2004
    Location:
    Belgium
    #1
    USB 3.0 Bus:
    Host Controller Driver: AppleUSBXHCIFL1100
    PCI Device ID: 0x1100
    PCI Revision ID: 0x0010
    PCI Vendor ID: 0x1b73
    USB3-to-SATA Bridge Device:
    Product ID: 0xb0b4
    Vendor ID: 0x1e91
    Version: 0.00
    Serial Number: 4F435A2D35345334335550304B3238575A595243
    Speed: Up to 480Mb/sec
    Manufacturer: OEM
    Location ID: 0x00400000 / 7
    Current Available (mA): 500
    Current Required (mA): 500
    Extra Operating Current (mA): 0
    Media:
    Voyager Q:
    Capacity: 3 TB (3.000.592.982.016 bytes)
    Removable Media: No
    BSD Name: disk8
    Logical Unit: 0
    Partition Map Type: GPT (GUID Partition Table)
    USB Interface: 0
    This happens on 2 different computers: a MacPro 5,1 en MacBook Pro 11,4
    It started with lockups in Mojave on de Mac Pro. De USB disk appeared afterwards only after zapping the PRAM on the MacPro. The lockups were caused by moving the mouse while running disk utility under Mojave.
    Speed is only occasionally up to 5Gb/sec but most of the time 480 MB/sec.
     
  2. chrfr macrumors 604

    Joined:
    Jul 11, 2009
    #2
    This is likely due to the enclosure or cables. Have you looked for firmware updates for the enclosure?
    The Mac Pro 5,1 is only a USB 2.0 computer so unless you've added a USB 3.0 card, 480Mb/sec is to be expected there.
     
  3. Mac Hammer Fan thread starter macrumors 6502a

    Mac Hammer Fan

    Joined:
    Jul 13, 2004
    Location:
    Belgium
    #3
  4. chrfr macrumors 604

    Joined:
    Jul 11, 2009
    #4
    I would contact NewerTech/OWC to see what they have to say about it.
    Edit: I regularly use a differently branded version of the same product in Mojave without any speed issues on a variety of computers.
     
  5. Mac Hammer Fan thread starter macrumors 6502a

    Mac Hammer Fan

    Joined:
    Jul 13, 2004
    Location:
    Belgium
    #5
    Perhaps my USB 3.0 card caused the problem. I had several lockups under Mojave. Everything worked well under High Sierra. After the lockups, the card didn't work until I zapped the PRAM. The lockups occured when I ran disk utility to check the internal startup disk and I moved the cursor or mouse.
    The USB card is this one: FRESCO FL1100 bought on ebay for 30$. Perhaps this card damaged the NewerTech Enclosure.
    Is the Sonnet Allegro USB 3.0 card fully compatible with Mojave?
    https://www.sonnettech.com/product/allegrousb3pcie4port.html
     
  6. chrfr macrumors 604

    Joined:
    Jul 11, 2009
    #6
  7. Mac Hammer Fan thread starter macrumors 6502a

    Mac Hammer Fan

    Joined:
    Jul 13, 2004
    Location:
    Belgium
    #7
  8. chrfr macrumors 604

    Joined:
    Jul 11, 2009
    #8

Share This Page

7 June 3, 2019