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APFS, Mojave, Sonnet Tempo?
- Thread starter 0488568
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Thanks.
I was able to get it working with Mac OS Extended (Journaled) but I haven't been able to upgrade mojave because of this.
But how did this guy do it, then?
https://forums.macrumors.com/threads/mojave-on-raid-with-apfs-a-howto.2125096/
https://forums.macrumors.com/threads/mojave-on-raid-with-apfs-a-howto.2125096/
I did not use InstallESD, I did follow instructions and attempted it from the CPI/shell and it did not work.
I also attempted it and restore from a backup and it also did not work.
If you have to go through all this hoops to get this working I don't want to risk a future upgrade braking my drive
Apple don't support and you tweak until you get it working are very different things.
If you do install like the post, you can't apply updates for example.
Ok, got it, thanks.
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Well, I am afraid I cannot help you any further.
I hoped you will find help in that link...
One thing of note, Apple use RAID-0 with iMac Pro SSD, but since the T2 controller hides the dual SSDs, macOS thinks that is just one volume. Some hardware controllers that do the same work with Mojave.
The individual boards in a iMac Pro are just NAND daughter cards. They are not an SSD. The T2 is the SSD controller so that is part of the SSD. The NAND cards just have a "buffer / director" chip on them ( in part because they are unusually far from the SSD controller chip relatively to most SSDs. ). There are two cards because that was a way for Apple to get to higher SSD capacity without cranking the NAND storage density very high( easier to get to 4TB with 8 NAND chips than with just 4. ).
There is nothing particularly different to the SSD that the T2 presents to the system than any other mid-higher end SSD. If writes are about as fast as reads then the SSD system is using some variant of "RAID 0".
Any RAID hardware that presents to the boot system as a ACHI standard storage device will work fine. The "problem" that APFS has with "RAID" is primarily with Software RAID; not "RAID" itself. At boot it pragmatically needs to be a 'drive'.
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APFS is probably not going to get RAID. ( APFS is partially a volume manager similar to Core Storage. It subsumes both Core Storage and HFS+ . ) . Apple expanded APFS scope to include "Fusion Drive" but most of the commentary made by the main design seem to indicate they aren't particularly interested into looking at multiple drive solutions.
It is software RAID that is the problem. Apple isn't going to provide a direct solution. ( they may be adding in some 'hooks' so as to be less 'hostile' to software RAID. )
SoftRaid says they will have a solution at a later date. ( They need to work out a 'dance' so that can work with the APFS boot context. And the security measures that in targeted by Apple in that context. )
"... SoftRAID 6.0 will be fully compatible with APFS disks and volumes. You'll be able to create and manage APFS volumes and SoftRAID 6.0 will also offer extra functionality to allow you to further manipulate APFS volumes. At the same time you'll still get all SoftRAID's great existing functionality, whether you're working with APFS or HFS formatted disks. ... "
https://www.softraid.com/pages/support/compatibility_notes.html#OS10.14_Mojave