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High Sierra Clean Install problem

Oktober

Oktober

macrumors regular
Original poster
Dec 16, 2008
180
2
United Kingdom of Great Britain
Have I done this correctly as I am unsure?

I created a bootable USB drive of High Sierra and performed a clean install and I used this method:

  • insert USB drive into the back of the iMac
  • restart iMac
  • press Option key
  • select disc utility
  • erase HDD selecting OSX journaled
  • quit disc utility
  • install OSX High Sierra
All that went well. Now I have just completed the 10.13.3 software update.

Heres the bit I am unsure if I have done this clean install correctly as High Sierra is APFS (or whatever it is) should it not say that in Disc Utility underneath Macintosh HDD?

Also I have a 2TB Fusion drive on my late 2015 5K iMac and when I erased I just clicked on the HDD rather than the Fusion bit.

I would be greatly appreciative if someone could advise me on this before I go further and start installing and importing all my files etc...

Many thanks

Darren
 
APFS will not yet work with Fusion Drives. Only with SSDs.

Format your drive with HFS + and you'll be good.

APFS is for all drives but capitalizes on SSDs. Currently APFS does not support anything else other than SSDs. It will come but it will take more time !
 
25ghosts said:
APFS will not yet work with Fusion Drives. Only with SSDs.

Format your drive with HFS + and you'll be good.

APFS is for all drives but capitalizes on SSDs. Currently APFS does not support anything else other than SSDs. It will come but it will take more time !
Click to expand...

Thank you for that info on APFS. I thought that Mac OS Extended (Journaled) was HFS + ? Thats what I seem to find when I google it?

This is what my Disc Utility looks like currently..... (See attachments)

Is this correct?
 

Attachments

  • Fusion.png
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  • MHD.png
    MHD.png
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Also, I was just thinking when I was at the 'erase stage' I should of clicked on the Fusion Drive then erase; then clicked on the Macintosh HD then erase; then quit and install OSX



Rather then what I did as just click on Macintosh HD and erase.
 
OP wrote:
"Heres the bit I am unsure if I have done this clean install correctly as High Sierra is APFS (or whatever it is) should it not say that in Disc Utility underneath Macintosh HDD?
Also I have a 2TB Fusion drive on my late 2015 5K iMac and when I erased I just clicked on the HDD rather than the Fusion bit."

There is nothing wrong here.
APFS =DOES NOT WORK= with fusion-drive Macs.
Instead, when you install, it sticks with HFS+.

My personal opinion:
BE HAPPY that you DO NOT HAVE APFS.
HFS+ is "tried and true".
Don't worry about this.

I'm thinking that Apple may not bother changing or "fixing" this.
That is to say, perhaps fusion-drive equipped Macs will never get "upgraded" to work with APFS. I could be wrong.
 
Oktober said:
Thank you for that info on APFS. I thought that Mac OS Extended (Journaled) was HFS + ? Thats what I seem to find when I google it?
Click to expand...

Mac OS = HFS. Extended = HFS+. Journaled = having a journal to prevent data loss.
So Mac OS Extended (journaled), is HFS+ with a journal - the one that you want, yes.

Oktober said:
Also, I was just thinking when I was at the 'erase stage' I should of clicked on the Fusion Drive then erase; then clicked on the Macintosh HD then erase; then quit and install OSX
Click to expand...

Selecting erase on the Fusion Drive reinitialises the entire Core Storage Drive - In other words, remakes a partition map and sets up a new partition. No need to then click erase again. Clicking erase only on the Fusion Drive is enough.
In your case, you clicked Erase only on Macintosh HD.

Unless your GPT is broken, or you have multiple partitions that you want to erase all at once and/or repartition, this is sufficient. Since you only have your main partition (and probably an invisible recovery partition), what you did is fine, and you shouldn't worry about it, but for the next time, just erase the entire disk instead of the volume which is what you did.
 
casperes1996 said:
Mac OS = HFS. Extended = HFS+. Journaled = having a journal to prevent data loss.
So Mac OS Extended (journaled), is HFS+ with a journal - the one that you want, yes.



Selecting erase on the Fusion Drive reinitialises the entire Core Storage Drive - In other words, remakes a partition map and sets up a new partition. No need to then click erase again. Clicking erase only on the Fusion Drive is enough.
In your case, you clicked Erase only on Macintosh HD.

Unless your GPT is broken, or you have multiple partitions that you want to erase all at once and/or repartition, this is sufficient. Since you only have your main partition (and probably an invisible recovery partition), what you did is fine, and you shouldn't worry about it, but for the next time, just erase the entire disk instead of the volume which is what you did.
Click to expand...

Casperes1996, Thank you for the answer that I was after. So for future reference 'If' I decided to do a clean install again I should just click on the fusion drive bit.
 
Oktober said:
Casperes1996, Thank you for the answer that I was after. So for future reference 'If' I decided to do a clean install again I should just click on the fusion drive bit.
Click to expand...

Personally, I always chose to break up the Fusion Drive when I had a Mac with one in it. The SSD by itself is always faster, and I just like to have control over every drive individually. But that's me. Apple's way of fusing a traditional hard drive with an SSD is certainly among the best, if not the best, as compared to other companies' SSHD solutions.
 
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