High Sierra on a cMP

[DetroitRockCity]

Hello,
I just ordered a hex core cpu (w3690) to upgrade my 2009 quad core mac pro (flashed to 5,1 already).
I am looking to upgrade to High Sierra, but I had a question about the new APFS format. I have a SSD boot drive, and then two hard drives set up as RAID 0 through disk utility.

Will my drives automatically be converted to APFS? If so, will the RAID still work? Should I find a work around to keep them as HFS+? I read through some previous threads, but I couldn't find a solid answer.

Trying to keep the dream alive with my 2009 cMP! I do video editing and it has been perfect for 1080p video, but lately all of my editing is with 4k .MXF files in Premeire Pro. Hoping the hex core helps!

 

[hnr2802]

By installing HS your SSD boot drive will automatically converted to APFS. But it is possible that you can skip converting to APFS during the macOS HS installation process if desired.

Open the Terminal application, Enter the following command syntax at the command line prompt:

/Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/startosinstall --converttoapfs NO

HS installation will not proceed if your boot drive in RAID 0. APFS doesn't support RAID.

But, the other way around is to install HS in an external drive & clone it with Carbon Copy Cloner to your RAID drives.

 

[justin1911]

I can totally relate to you man. Here's your options:

* Upgrade to High Sierra and use APFS. I did that and experienced pretty poor performance. But I did the install again recently and APFS is working fine.

* Keep HFS+ during the HS upgrade process. To do so.

1. Download the High Sierra upgrade from the App Store.

2. Assuming you downloaded High Sierra from the App Store, it will drop the app in to /Applications. Then, paste this command in to Terminal for a silent upgrade.

sudo /Applications/Install\\ macOS\\ High\\ Sierra.app/Contents/Resources/startosinstall --applicationpath /Applications/Install\\ macOS\\ High\\ Sierra.app --agreetolicense --converttoapfs NO --nointeraction"​

Or this one for an interactive upgrade.

sudo /Applications/Install\\ macOS\\ High\\ Sierra.app/Contents/Resources/startosinstall --applicationpath /Applications/Install\\ macOS\\ High\\ Sierra.app --converttoapfs NO​

 

[DetroitRockCity]

I can totally relate to you man. Here's your options:

* Upgrade to High Sierra and use APFS. I did that and experienced pretty poor performance. But I did the install again recently and APFS is working fine.

* Keep HFS+ during the HS upgrade process. To do so.

1. Download the High Sierra upgrade from the App Store.

2. Assuming you downloaded High Sierra from the App Store, it will drop the app in to /Applications. Then, paste this command in to Terminal for a silent upgrade.

sudo /Applications/Install\\ macOS\\ High\\ Sierra.app/Contents/Resources/startosinstall --applicationpath /Applications/Install\\ macOS\\ High\\ Sierra.app --agreetolicense --converttoapfs NO --nointeraction"​

Or this one for an interactive upgrade.

sudo /Applications/Install\\ macOS\\ High\\ Sierra.app/Contents/Resources/startosinstall --applicationpath /Applications/Install\\ macOS\\ High\\ Sierra.app --converttoapfs NO​

I'll stick to HFS then. When you say interactive, will it give me the choice of HFS during the interactive install, or does this terminal command force it as HFS no matter what the installer says?
[doublepost=1516900181][/doublepost]

By installing HS your SSD boot drive will automatically converted to APFS. But it is possible that you can skip converting to APFS during the macOS HS installation process if desired.

Open the Terminal application, Enter the following command syntax at the command line prompt:

/Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/startosinstall --converttoapfs NO

HS installation will not proceed if your boot drive in RAID 0. APFS doesn't support RAID.

But, the other way around is to install HS in an external drive & clone it with Carbon Copy Cloner to your RAID drives.

My boot drive is not RAID, but two of my storage drives are RAID 0. So does it convert the SSD boot drive to APFS and then leave the RAID storage drives as HFS? However, I might just make all of the drives stay as HFS.

 

[h9826790]

I'll stick to HFS then. When you say interactive, will it give me the choice of HFS during the interactive install, or does this terminal command force it as HFS no matter what the installer says?
[doublepost=1516900181][/doublepost]
My boot drive is not RAID, but two of my storage drives are RAID 0. So does it convert the SSD boot drive to APFS and then leave the RAID storage drives as HFS? However, I might just make all of the drives stay as HFS.

That command AVOID the force APFS conversion, no option for you to select in GUI. The option is already done in command line.

HS should not touch your data drives' RAID array.

I personally also suggest stay at HFS+ by all means. Almost all my issues in HS is APFS related (10.13.2 and later). Once I go back to HFS+, my HS is actually a bit like the modern version of 10.6.8. Zero issue, very smooth, no more strange Finder micro freeze, no more slow boot, TRIM work properly, storage capacity (and remaining free space) can be accurately indicated in no time....