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New Apple File System Coming in macOS High Sierra Won't Work With Fusion Drives

CarlJ said:
Filesystems are one part of an OS where I really don't want the developers to rush, I want all the bugs thoroughly ironed out. Because that's where I keep all my stuff.
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Which is why, on my Windows systems, I don't update the firmware on the RAID cards, unless I fully vet them on a test system, or a brand new computer, which are usually the test beds.

Explaining to a customer why their business critical data went bad is a place I don't want to be.
 
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I have my 2012 iMac booting from an external SSD with my media and files stored on the internal HDD.

I'm guessing I should hold off updating?
 
eatrains said:
Did you not read the article? They're NOT releasing something that's not ready. Pay attention next time, or you'll just end up looking like a fool.
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Depends on your point of view. They are releasing on iPhones. Because they can't make it work on Fusion drives you think they haven't released it?
 
The question I have is will the new file system install on user installed SSDs?

This being Apple makes me wonder.
 
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WatchFromAfar said:
Depends on your point of view. They are releasing on iPhones. Because they can't make it work on Fusion drives you think they haven't released it?
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They're releasing it for iOS devices and Macs with SSDs. They're not releasing it for Fusion drives, which flies in the face of the claims that they're releasing things that aren't ready to satisfy marketing.
 
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jigzaw said:
Maybe they need to spend some more time perfecting this before they roll it out. Maybe hold off til next year's OS. Because if they mess this up, it'll be a disaster of how many thousands of people losing/corrupting ALL of their data? No bueno.

I have an all-SSD 2017 iMac so this particular issue doesn't affect me, but it's making me think twice about updating when the new OS comes out because I don't want to be a guinea pig when I use my iMac for my livelihood.
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The way I look at it is, if there was a problem with installing on SSD, they would have held APFS back from the GM for all users. And, while they're holding back on new conversions to APFS for HDD-only Macs, they're not asking HDD-only testers to roll back to HFS+ prior to installing the GM. I consider those to be good signs, not bad. They're clearly cautious (as they should be).

Something like 70% or more of iOS users are already running APFS. Without a hitch, for well over 6 months. That may make the conversion to APFS on iOS 10.3 one of the biggest successes in software upgrade history. While that doesn't mean that success automatically translates to MacOS, the beta (for all-SSD users) seems to have been very successful.

Caution is always called for, but I'm not sure it's necessary to wait until MacOS 10.14.
 
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eatrains said:
Did you not read the article? They're NOT releasing something that's not ready. Pay attention next time, or you'll just end up looking like a fool.
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We'll see if its ready or not. My comment had nothing to do with the article, but rather the product they are releasing. I suspect its not ready based on Apple's tendency to release things ready or not. You think its going to be as perfect as possible. No problem having different opinions, but Apple has been lowering that ready as possible bar ever since Jobs released control.
 
eatrains said:
They're releasing it for iOS devices and Macs with SSDs. They're not releasing it for Fusion drives, which flies in the face of the claims that they're releasing things that aren't ready to satisfy marketing.
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Everything you said is true. But they still released it, maybe not everywhere, maybe not on every thing under the sun, but they released it nether the less.
 
PJivan said:
They will, when it's ready, in the meantime they can take advantage of the main reasons for high sierra to exist, such as metal 2, external GPU, and the classic improvemente of every os x release.
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Of these reasons to upgrade, I am still waiting for more information concerning e-GPU support.
 
cerote said:
But again never run beta on a machine you need to work 100%.
.
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I just see a lot of people complaining about having to go through tons of steps for their iMacs with Fusion Drive who were on the beta program.

Yeah it sucks but this was a beta.
 
Sure glad I didn't put myself through Apple's experiment on my iMac. I wonder what all those that have bought an iMac in the past six months think of Apple's stupidity up to this point. $4000 grand and no APFS but the old HFS+.
 
emulajavi said:
Hi.

Currently I have a late 2015 iMac with:

128GB SSD + 2TB HDD (Fusion Drive)
Using Bootcamp, the 2TB HDD is partitioned to 2 x 1TB and Windows is installed on one of the 1TB partitions.


I’d be very pleased if Bootcamp did this:

Keep OS X on:
Partition of 64GB on the SSD + Partition of 1TB on the HDD (Fusion Drive)

Install Windows:
on the other 64GB of the SSD (C: on Windows) + making available 1TB of the HDD for Windows files (D: on Windows)

This looks simple but I know that there are OS X Recovery Partitions and Windows Recovery partitions that need their place and I don’t want it all to be messed up if I do it manually or what could happen if, when having my desired setup, I need to reinstall from scratch Windows or OS X.


How easy is it?

Thank you.
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I doubt this has anything to do with the hidden Recovery partitions, which are, almost undoubtedly, resident only on the HDD like the Boot Camp partition.

Splitting the Fusion Drive as you describe would not be at all easy. Fusion Drive requires CoreStorage, which is a feature of MacOS. You'd have to be running both MacOS and Windows simultaneously - in other words, you'd need to be using virtualization software, rather than running Windows "native," which is what happens when you're running in Boot Camp - either MacOS or Windows, not both.

To date, CoreStorage supports only a single Fusion partition. That's the way it's written, and I don't see it changing.
 
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Barry Marshall said:
Sure glad I didn't put myself through Apple's experiment on my iMac. I wonder what all those that have bought an iMac in the past six months think of Apple's stupidity up to this point. $4000 grand and no APFS but the old HFS+.
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You're implying duplicity. Beta is not something Apple imposes on naive bystanders. You have to elect in, knowing the risks. Seems the new filesystem will be coming in due time. There's more work to be done. I say let them get on with it.
 
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I Have an iMac late 2015 with SSD and I’ve installed all high sierra betas and finally the GM

APFS is failing in my computer in all releases.

When I delete files, and clean the trash, the filesystem doesn’t free the space and finally you’re running out of space.

Yesterday I delete WOW, about 40 GB, and today, Android SDK, 35 GB, and all the space was not freed by the system...even checking the hard disk the OS always reports the disk is correct and has no errors

Actually I’m restoring the system back to Sierra OS from time machine.

Remember that High Sierra converts your file system to APFS if the hard disk is a SSD and you cannot change this option.

My recommendation for you is not to install High Sierra and wait till next release.
 
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