I own a Sonnet Tempo SSD Pro Plus, for a long time it was forgotten on the shelf but after some disappointing tests with the Angelbird Wings X2 I decided to put it back in my MacPro (2012 model, upgraded to single X5690 and 24 Gb of 1333 MHz RAM) and after some speed tests I choose to keep it as my main Mojave system disk.
The configuration is as follow:
Slot 4: Sonnet Tempo Pro Plus with 2 Crucial MX500 512 Gb each, configured in Raid0 via standard Disk Utility and formatted as HFS+ (trimforce enabled)
Slot 3: Inateck USB 3.0 4 port USB host controller
Slot 2: empty
Slot 1: Sapphire Pulse RX580 8 Gb Vram (Orinoco framebuffer)
Boot time: 20 seconds from chime to Mojave desktop
Transfer rates: 790 Mb/s Write and 980 Mb/s Read (much faster than Wings X2 in hardware RAID0 mode)
Very responsive system, I am really happy about this configuration, however everything it's come to a price:
- Mojave was trasferred (via Carbon Copy Cloner) from a bootable APFS disk to the HFS+ soft RAID0 on Sonnet card since it is not possible to install natively and boot OSX 10.14 on a soft Raid0 array, therefore the Recovery partition is lost.
- The measured write/read speed is slow if compared to a NVMe drive (1400 Mb/sec) but the boot time is greatly reduced (on a Samsung 970EVO I measured 35 seconds from chime to desktop) in the real world the difference is almost unnoticed.
- Having a RAID0 array makes mandatory to have a Time Machine dedicated disk because the failure of one SSD means the loss of everything on the array.
- I don't know if future OSX 10.14 updates will install since the boot volume is now an HFS+ soft raid and not a solid APFS one
For some reasons the Crucial MX drives works as a charm on the Sonnet and not so good on the Angelbird card, I suspect the integrated "garbage collecting" of the Crucial SSDs interferes in some way with the Wing X2's hardware, maybe a "dumb" SSDs without this feature would work better.
To be honest I would prefer to have an hardware RAID0 array instead the one I created thru Disk Utility because if APFS was intended to be used with Mojave, using the HFS+ format is not optimal, I can't install it natively and I can't have a Recovery partition to boot from.
Anyway I found the Sonnet Tempo Pro (plus) solution still very good and usable and if high velocity write/read tasks are not needed I can reccomend it strongly, I don't feel any nostalgia about my previous NVMe 970EVO drive.
Hower if it is possible (using other hardware) to further reduce on the MacPro 5.1 the boot time below the 20s (chime to desktop) please let me know how to and I will be more than happy to upgrade