I'm new to the forum, go easy on me. I've been trying to no avail for several days now to setup an external SSD RAID 0 configuration on my mid 2010 iMac using High Sierra's Disk Utility. Currently I have only succeeded in setting up a JBOD, which is fine if that's the only one that will work, but I would ideally like to have the RAID 0 setup as that same setup on another iMac of mine (internal 1T SSDs in a RAID 0 format, most excellent!) has worked flawlessly and there's very noticeable improvement in performance.
I'm aware that external drives on a mid 2010 iMac will be inherently slow since the interface is USB 2.0, but that would still allow for a significant improvement in performance from these 2 SSD drives, were they to be combined into RAID 0.
So what happens when I do attempt to use Disk Utility to do this is that the formatting process begins, then the screen goes dark for a few seconds, then white, and then an error message comes up saying something to the effect that the computer needs to be restarted because of a problem (unspecified problem). After rebooting, the RAID will show up in Disk Utility greyed out and unable to mount, erase, or do anything other that to Delete RAID, which I've had to do each time.
I've tried this same process using APFS formatting, MacOS Journalled, different partition tables. None of these have worked.
So, my friends, I reach out to you in desperation. Can this be done on my unit? Am I missing something? I believe I have followed all the instructions at my disposal and have even tried different ways to handle this but nothing seems to work. I await your wisdom and experience.
I'm aware that external drives on a mid 2010 iMac will be inherently slow since the interface is USB 2.0, but that would still allow for a significant improvement in performance from these 2 SSD drives, were they to be combined into RAID 0.
So what happens when I do attempt to use Disk Utility to do this is that the formatting process begins, then the screen goes dark for a few seconds, then white, and then an error message comes up saying something to the effect that the computer needs to be restarted because of a problem (unspecified problem). After rebooting, the RAID will show up in Disk Utility greyed out and unable to mount, erase, or do anything other that to Delete RAID, which I've had to do each time.
I've tried this same process using APFS formatting, MacOS Journalled, different partition tables. None of these have worked.
So, my friends, I reach out to you in desperation. Can this be done on my unit? Am I missing something? I believe I have followed all the instructions at my disposal and have even tried different ways to handle this but nothing seems to work. I await your wisdom and experience.