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Old 06-27-2019, 01:19 PM
skizzo skizzo is offline
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Join Date: Aug 2010
Location: United States
Posts: 83
Default Re: Upgrading a Mac Pro 5.1 12core 2.4Ghz

i suppose if you do not have a PCIe NVMe SSD you wouldn't know that it is treated as an external drive when in macOS or Windows. of course it's internally in the computer....and clearly not the point of my post. JFreak mostly got it with the SSDs on internal native SATA sled ports being seen as internal per the OS and NVMe drives on PCIe NVMe controllers being seen as external per the OS. Adding in hardware is going to prolong the POST, and PCIe NVMe SSDs are part of that behavior. No different than booting with 1 ram stick or 8, more hardware = longer POST. And there is obviously a sequence to the POST, so certain hardware is initialized before/after others. regardless of my lack of more detailed knowledge on that process PCIe NVMe SSDs boot slower than a SSD connected to the native SATA ports on the cMP

I said "PCIe is external hardware" but should have clarified "PCIe NVME SSDs is external hardware to the OS". I mean cmon, what ****ing idiot would think it's external when its clearly inside the machine? common sense and logic would make someone realize I didn't mean something inside a computer is external.

I deff never said anything about them being slow, or on slow connections either. the PCIe 2.0 x 16 ports are the fastest connection on the computer as far as I know. and clearly the ~3200Mb speeds (capability, but are bottleneck by PCIE 2.0 x4 so its closer to ~1500Mb...unless you really spend on a controller with a switch) are way faster than what...like 500Mb speeds of of 2.5" SSDs? They are night in day in performance. but for our niche of a niche use case in cMPs they also make a noticeable difference in boot times. even the disk format matters, APFS and TRIM support has impacted boot times for cMP users even

heck, when you booted to the PCIe NVMe SSD for a while it would boot TWICE. I never looked at it in verbose mode to see what was happening but anytime you switched disks going to a PCIe NVMe SSD, and this was with OFFICIAL support, it would boot loop twice. the 2nd boot would make it to the OS every time though. This issue existed during the hacking period, and during the first official support bootrom which was 140. This double boot loop issue only went away with 141 i think, or 144. There were other ways to circumvent it by using apps like "Boot Manager" created by another macrumors user. My point being here is the support for this hardware is an afterthought to say the least given this tech didn't exist in 2009 and it shouldn't be surprising they have some challenges like that. One of them being they boot slower on these systems when compared to modern systems
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