4 ms·

Interesting. I just bought an M1 Mac mini. I added a nvme m.2 ssd (Samsung PM9A1 + Orico SCM2T3-G40) over thunderbolt 3 and moved the admin user over. Unfortuna

by foft 5y ago

Interesting. I just bought an M1 Mac mini. I added a nvme m.2 ssd (Samsung PM9A1 + Orico SCM2T3-G40) over thunderbolt 3 and moved the admin user over. Unfortunately I had to send back the ssd and adaptor since it was reading at only 75MB/s for some reason. Anyway I created a new admin on the internal ssd before deleting the external ssd. If I understand this article correctly it’s saying that I will no longer be able to update since I now only have a secondary admin user. Is that correct?

70rd 5y ago
Were you getting those speeds with random reads or sequential? I have one of the Orico enclosures and it works great.
- foft 5y ago
  I used initially 'Blackmagic disk speed test'. This tool seems to only have an option for 1-5GB. I did not find a random or sequential option. I've definitely seen screenshots of this tool giving high read speeds using the Orico. Then I tried 'ATTO disk benchmark'. This tool tries a variety of read and write I/O size ranges. The results I got here were strange. As expected as the I/O size range grows, the read bytes/s increase. Then it hits 1MB I/O size and the throughput drops to almost 0. Write was consistent across the range, perhaps since it simply hits a buffer on the SSD to be processed later. With dd I achieved good performance transferring a 5GB file, after a reboot to ensure the file cache was definitely flushed. Perhaps it was an issue with the firmware version for the Orico or the SSD itself. Unfortunately I was unable to update the latter since the 'Samsung Magician' software is windows only. On my windows devices I have no thunderbolt ports.
  - 70rd 5y ago
    Bizarre. I'm on Linux and only really ever tested it with dd (use it for backups/installing Windows on metal so I don't have to deal with PCIe pass-throughs with a VM), but the results have been great for me.
foft 5y ago
Update: The Big Sur 11.5 update with the second admin user, and no primary admin home directory, worked without issue.

by foft 5y ago

70rd 5y ago

Were you getting those speeds with random reads or sequential? I have one of the Orico enclosures and it works great.

foft 5y ago
I used initially 'Blackmagic disk speed test'. This tool seems to only have an option for 1-5GB. I did not find a random or sequential option. I've definitely seen screenshots of this tool giving high read speeds using the Orico. Then I tried 'ATTO disk benchmark'. This tool tries a variety of read and write I/O size ranges. The results I got here were strange. As expected as the I/O size range grows, the read bytes/s increase. Then it hits 1MB I/O size and the throughput drops to almost 0. Write was consistent across the range, perhaps since it simply hits a buffer on the SSD to be processed later. With dd I achieved good performance transferring a 5GB file, after a reboot to ensure the file cache was definitely flushed. Perhaps it was an issue with the firmware version for the Orico or the SSD itself. Unfortunately I was unable to update the latter since the 'Samsung Magician' software is windows only. On my windows devices I have no thunderbolt ports.
- 70rd 5y ago
  Bizarre. I'm on Linux and only really ever tested it with dd (use it for backups/installing Windows on metal so I don't have to deal with PCIe pass-throughs with a VM), but the results have been great for me.

foft 5y ago

Update: The Big Sur 11.5 update with the second admin user, and no primary admin home directory, worked without issue.