Blackmagic Disk Speed Test, available from the App Store, is now a Universal App, but returns read and write benchmarks of between 2.7 and 3.5 GB/s, which are very similar to those of a T2 model. One clear conclusion for the moment is that relative performance of M1 Macs depends on which benchmark you use. Their one crucial performance area which isn’t as clear is their internal storage: I’ve seen a range of benchmark results which either set them on a par with T2-equipped Macs like my iMac Pro, or just seem puzzling. I want to buy a new sata cable to fix the problem because i'm tired of booting from an external USB3 drive and never being able to wake it from sleep (it gives me the rainbow wheel of death when i try), but i'm worried that there's a chance it's not the problem since it works just fine with the backup harddrive.There now seems no doubt that, by any standards or comparisons, Apple’s first Apple Silicon Macs, its M1 models, are wickedly quick. when i try to boot it from the interal interface in verbose mood, i get "Sata warning: enable drive phy pm failed", but from the external enclosure it works fast and everything. Then I restored and reinstalled mac os on my SSD in an external enclosure (since it wouldn't install while it was inside), and it worked fine in there. I have a carbon copy cloned backup on a 2.5" 5400rpm and I installed it in my computer (internal 2.5" slot) for awhile, and it worked fine, albeit very slowly, almost unusably. I tested the ssd with crystal disk info, and it said it was 99% good. Hello, my macbook wouldn't boot one day so I tried to fix it but ended up reinstalling mac OS El Capitan on my 512GB samsung SSD that i use in it.
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