So Tahini Creek is the Acasis?
Do you see a NVMe in the PCI list connected to a Thunderbolt slot?
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Thunderbolt 3 M.2 NVMe SSD Enclosures
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Do you see a NVMe in the PCI list connected to a Thunderbolt slot?
Thought I’d share my results with everyone with Acasis USB 4 paired with WD SN750 1TB and 2TB APFS formatted. MacBook Air with M1 Chip, 8GPU Cores.
Amorphous Disk:
1TB:
Unencrypted: Read: 3116 MB/s Write: 1020 MB/s &
4KQD1: Read: 43.13 MB/s Write: 31 MB/s
Encrypted: Read: 2780 MB/s Write: 2124 MB/s
4KQD1: Read: 40 MB/s Write: 27 MB/s
2TB:
Unencrypted: Read: 3101 MB/s Write: 885 MB/s &
4KQD1: Read: 41 MB/s Write: 29 MB/s
Encrypted: Read: 2589 MB/s Write: 1110 MB/s
4KQD1: Read: 37 MB/s Write: 26 MB/s
Blackmagic:
1TB:
Unencrypted: Write: 2060 MB/s Read: 2316 MB/s
Encrypted: Write: 2400 MB/s Read: 2708 MB/s
2TB:
Unencrypted: Write: 995 MB/s Read: 2691 MB/s
Encrypted: Write: 1094 MB/s Read: 2267 MB/s
I’m disappointed with 2TB performance which I recently purchased about a month back. Maybe its the denser 512Gb die or its skipping the SLC cache? I don’t know.
Amorphous Disk:
1TB:
Unencrypted: Read: 3116 MB/s Write: 1020 MB/s &
4KQD1: Read: 43.13 MB/s Write: 31 MB/s
Encrypted: Read: 2780 MB/s Write: 2124 MB/s
4KQD1: Read: 40 MB/s Write: 27 MB/s
2TB:
Unencrypted: Read: 3101 MB/s Write: 885 MB/s &
4KQD1: Read: 41 MB/s Write: 29 MB/s
Encrypted: Read: 2589 MB/s Write: 1110 MB/s
4KQD1: Read: 37 MB/s Write: 26 MB/s
Blackmagic:
1TB:
Unencrypted: Write: 2060 MB/s Read: 2316 MB/s
Encrypted: Write: 2400 MB/s Read: 2708 MB/s
2TB:
Unencrypted: Write: 995 MB/s Read: 2691 MB/s
Encrypted: Write: 1094 MB/s Read: 2267 MB/s
I’m disappointed with 2TB performance which I recently purchased about a month back. Maybe its the denser 512Gb die or its skipping the SLC cache? I don’t know.
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You can either add an encrypted volume with disk utility or encrypt an existing volume in your finder window by right clicking on it. Either way you need to format the drive with APFS.
Curious
Which SSD do you have? Capacity and date of manufacture?
In my case, reads and writes go the opposite directions with different volume type
Attachments
I have the WD SN750 4TB capacity. So formatting the drive as APFS encrypted gave you the faster speeds?
What enclosure are you using Mr. T?
Yes encrypting a volume within an APFS container gave me better write speed. Both 1TB and 2TB drives are APFS formatted with multiple volumes. There is a noticeable performance difference in the case of 1TB model as you can see above. I have acasis enclosure with JHL7440 chipset paired with JMS583. Maybe higher capacities on SN750 just don’t perform well due to higher density dies or maybe there is more at play here, like revised components, firmware etc. One can only speculate at this point.
After I finish this project that is currently on the drive, I'll have to try formatting it with encryption and see if that increases the write performance, it's in a Fledging TB3 enclosure and I'm using an Intel Mac.
I'm use to spinning drives with encryption slowing the write speed significantly but I haven't tried it on an NVME,
maybe there's some quirk where encryption actually increases write speeds on NVMEs in external enclosures...
This is what I would expect with encryption but I hope I'm wrong.
apple.stackexchange.com
I'm use to spinning drives with encryption slowing the write speed significantly but I haven't tried it on an NVME,
maybe there's some quirk where encryption actually increases write speeds on NVMEs in external enclosures...
This is what I would expect with encryption but I hope I'm wrong.
Slow write speeds with APFS encryped external SSD
I bought an external SSD with a USB 3.1 gen 2 enclosure. I'm on macOS 10.13.6 with a MBP (late 2013). Using APFS I get write speeds of around 390–405 MB/s. So far, so good. However formatting the ...
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I see. Do share your results from both Amorphous Diskmark and Blackmagic post project completion. Below is an interesting review on different chipsets with different environments, but all performed on windows.After I finish this project that is currently on the drive, I'll have to try formatting it with encryption and see if that increases the write performance, it's in a Fledging TB3 enclosure and I'm using an Intel Mac.
I'm use to spinning drives with encryption slowing the write speed significantly but I haven't tried it on an NVME,
maybe there's some quirk where encryption actually increases write speeds on NVMEs in external enclosures...
This is what I would expect with encryption but I hope I'm wrong.
Slow write speeds with APFS encryped external SSD
I bought an external SSD with a USB 3.1 gen 2 enclosure. I'm on macOS 10.13.6 with a MBP (late 2013). Using APFS I get write speeds of around 390–405 MB/s. So far, so good. However formatting the ...
https://www.anandtech.com/show/1630...b-thunderbolt-3-dual-mode-external-ssd-review
@v0rtex Can you confirm that the XTRM-Q enclosures do have a USB to NVMe bridge Realtek 9108B chip as reported by anandtech and tomshardware? I ask because the JMS583 in the acasis enclosure gives me significantly worse performance (minus 200 - 300 MB/s) if connected through a USB-C Hub on a MacBook Air M1. I'm in a situation where I sometimes have to connect the nvme enclosure through a USB-C hub. It is not possible to connect the acasis enclosure to the thunderbolt port of USB-C Hub like the HyperDrive 6-in-1 USB-C Hub (HD319B model) because it apparently uses to much power or can't negotiate the proper power requirements.
I assume there isn't any way to tell without taking the unit apart? Wasn't planning on doing a dissection at this time.
Is there a report that says the Realtek 9108B has better performance than the JMS583 when connected to the M1 Mac? or even an Intel Mac? Or you want the Realtek 9108B to test it?
No, not necessarily. If you can plug the enclosure in a USB port on a windows system and run a tool like hwinfo.
I can report that a JMS583 enclosure like the IcyBox IB-1817M-C31 (with the newest firmware) gives me roughly about 200 - 300 MB/s less bandwidth in comparison to a 9210B-CG on a MacBook Air (M1) on the same Thunderbolt port.
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That's soley a Mac problem. Works fine under Win10
JMS583 FW 0209 + Samsung SM961
Realtek was always slower.
JMS583 FW 0209 + Samsung SM961
Realtek was always slower.
Both of those numbers are low. 1000 MB/s is expected for NVMe in JMS583 connected to Intel Mac (at least with AmorphousDiskMark.app - try that benchmark to be sure - it's similar in appearance to CrystalDiskMark.exe in Windows). M1 Macs have a problem with their USB. Use the USB controller of a Thunderbolt 3 port of a Thunderbolt 3 dock to get max speed. For M1 iMac, if you have the two non-Thunderbolt USB ports then those should be good as well.
https://forums.macrumors.com/thread...ally-10gb-s-also-definitely-not-usb4.2269777/
I also own a OWC Thunderbolt Hub (TB4HUB5P). The USB speed of the JMS583 and 9210B-CG on the USB-A Port (10 gbps) were pretty much the same as connected directly to the Thunderbolt port.
Based on my testing I came to the conclusion that the Sabrent XTRM-Q enclosures are the better choice for MacBook (M1) owners if you want to connect USB-A devices and a Thunderbolt or USB-C enclosure at the same time. The acasis enclosure uses a JMS583 USB to NVMe bridge and will not work because of power limitations of the USB-C Hubs like the HyperDrive 6-in-1 (HD319B). I also tested a bunch of other USB-C Hubs (Satechi, Ugreen, Mokin). They all don't provide enough power on the Thunderbolt Port to use a thunderbolt enclosure (I also tested the OWC Envoy Express). The HyperDrive is the only USB-C hub which also allows to charge the macbook with the second USB-C Port (5 gbps) albeit with lower wattage and provides 4k 60hz on a HDMI port. Just leaving this here for people which are in a similar situation.