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Is it feasible to build Fusion Drive with usb3.0 external ssd?

by Poster Mar 21, 2022 15
A 15 year old iMac, don't want to take apart the screen and install ssd. I plan to use an external usb ssd to set up a Fusion Drive. There is such a successful case.

Replies

  • Anonymous7483 Mar 21, 2022
    It should not work. The built-in interfaces and protocols are different from the external ones. The external one is USB, and the system does not allow you to do it.
  • Anonymous3706 Mar 21, 2022
    Just install an external large-capacity SSD. No matter how fusion performance is, it is not ideal.
  • Anonymous5344 Mar 21, 2022
    Just directly install the system externally, I have been using this for several years
  • Anonymous1359 Mar 21, 2022
    It seems that Thunderbolt can identify external disks as internal devices, but usb probably won't work
  • Anonymous5372 Mar 21, 2022
    Buy an SSD hard disk box or docking station that supports Thunderbolt 3 or 4 protocol, and the system will recognize it directly. I recommend Thunderbolt 4, otherwise it will be a waste of PCIE interface speed.
  • Anonymous263 Mar 21, 2022
    Just use the external ssd, don't think about fusion, install the system on the external ssd
  • Anonymous5373 Mar 21, 2022
    The correct solution to the external ssd installation system mentioned above. ！！ I used Fusion Drive for a while when I blacked Apple 10.13, and there was no performance improvement at all [256gb ssd + 1tb hdd + 9700k 16gbmem], which was slow as hell.
  • Anonymous3749 Mar 21, 2022
    Direct external PSSD running system, my old machine 2015 Macbook Pro 15 "runs properly, external box with Thunderbolt 2 interface.
  • Anonymous7483 Mar 21, 2022
    A 15-year-old iMac should have a Thunderbolt 2 interface or a USB 3.0 interface.
  • Anonymous7483 Mar 21, 2022
    So the upstairs said Thunderbolt 4 is serious
  • Anonymous3501 Mar 21, 2022
    Connect usb 3.0 to the hard disk to install the system, and it can be successful. Just slow
  • Anonymous5374 Mar 22, 2022
    @ Anonymous263 When starting, you can choose to start from external ssd, right
  • Anonymous263 Mar 22, 2022
    @ Anonymous5374 Right
  • Anonymous5375 Mar 25, 2022
    Yes, I bought an nvme hard drive box from IMAC in 2015, plugged in an nvme solid-state drive, and then rebuilt the system and booted it directly from the mobile hard drive
  • Anonymous3456 Sep 19, 2022
    fusion is not a high-tech, but a helpless move when SSDs were expensive at that time. You can just boot directly from USB SSD. There's no need to engage in any fusion.