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Apple's Policy on Apple File System (APFS) for High Sierra

RehabMan said:
Automatic APFS conversion outside of the installer seems rather unlikely (Internet FUD).
Converting requires doing so from a recovery environment and usually doesn't work anyway.

But the installer itself can be used reliably to convert to APFS if you didn't do it at upgrade time (startosinstall --converttoapfs YES).
Click to expand...

So I have a mid-2010 MacBook Pro whose lifespan I extended with a Samsung 850 PRO. I did a clean High Sierra install on it shortly after the High Sierra was officially released. Got an APFS, and as Millennials would say, OMG. It was as if I had put a 4800 RPM HDD in. So after two days, I repeated a clean install (after a Linux 'hdparm' secure-erase of the SSD), this time disabling the APFS conversion during the High Sierra install. Things were fine, and then 10.13.1 was released. The update took a LOOOONG time, and I mean *after* the download and reboot were done.

Then I accidentally stumbled on the "/var/log/hfs_convert.log" (attached). Looks like the filesystem was converted. Command-line 'diskutil' as well as the GUI version insist it's still a journaling HFS+. System isn't as slow as it was with 10.13.0.

The log file also says conversion took four (4) seconds? Insert the X-Files theme music here...
 

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  • hfs_convert.zip
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I was running High Sierra on APFS for a couple of days with 512gb Samsung EVO850. The whole OS worked great! Before that, I was testing Sierra with +HFS and it was significantly slower.

BUT... One of the most important things with using any OS in my opinion is a possibility of quick and easy backup. Unfortunately I've found this almost impossible with APFS :( Disk Utility doesn't allow making backup image from APFS partition - option is grayed (I've tried doing it from High Sierra installer, not from OS itself). Some folks recommend SuperDuper app, but restoring APFS image created with this tool ended with error prompt. I've even tried to make a raw copy of whole APFS partition using Windows version of Paragon Hard Disk manager (booted Win7 from other drive) and after waiting for eternity to restore partition, I've also got en error at the end of process. The only thing I didn't try is Carbon Copy Cloner, but after such inglorious fail of SuperDuper... I've lost any interest to bother more.

Eventually, I had to kiss goodbye to APFS and reinstall High Sierra with +HFS :( I'm using it for the last 36 hours and honestly, it works absolutely the same as with APFS... Or at least that's what I've concluded so far.
 
I use Carbon Copy Cloner instead of SuperDuper for no other reason it was the first back up utility I have used, and it works.
 
Stork said:
I use Carbon Copy Cloner instead of SuperDuper for no other reason it was the first back up utility I have used, and it works.
Click to expand...

Ok, since you're experienced CCC user, please let me ask you...

1. When you make an image of System partition, does the image filesize depend on partition size or partition content amount? For example, if system partition is 250gb but it has only 20gb used, what's the size of CCC image, 250gb or 20gb?

2. How can you restore CCC image without macOS and CCC installed? Can it be done through the High Sierra installer's utilities such es disk utility or terminal?

3. Can you save CCC image to non-apfs media such as MBR partitioned USB memory, and load it from there?

Thanks
 
1. Content. You can boot a CCC copy. It's not an image if I understand you correctly.

2. Since it's an exact copy of your original partition/drive and not an "image", you can use it directly, use CCC to copy it back to another or original partition/drive or by some Terminal command.

3. Not to my knowledge. You need to go to the CCC site and read the FAQs, etc.
https://bombich.com/
 
Stork said:
1. Content. You can boot a CCC copy. It's not an image if I understand you correctly.

2. Since it's an exact copy of your original partition/drive and not an "image", you can use it directly, use CCC to copy it back to another or original partition/drive or by some Terminal command.

3. Not to my knowledge. You need to go to the CCC site and read the FAQs, etc.
https://bombich.com/
Click to expand...

Thanks!
 
geter712 said:
Eventually, I had to kiss goodbye to APFS and reinstall High Sierra with +HFS :( I'm using it for the last 36 hours and honestly, it works absolutely the same as with APFS... Or at least that's what I've concluded so far.
Click to expand...

How did you do that ?

I have installed HighSierra on a M.2 960 with APFS file system. As an experiment I have installed an extra SSD 840 as a second disk in my hackintosh system. Subsequently, I repartioned the SSD 840 as HFS+. So far so good. Then I have installed HighSierra on this SSD 840. But, as soon if I reboot from the SSD 840 which was formatted as HFS+, and use Get Info, it tells me that the format is : APFS. That is weard though ???

So the question is: How can I force it to HFS+ again ?

Thanks in advance.
 
Bachatero said:
How did you do that ?

I have installed HighSierra on a M.2 960 with APFS file system. As an experiment I have installed an extra SSD 840 as a second disk in my hackintosh system. Subsequently, I repartioned the SSD 840 as HFS+. So far so good. Then I have installed HighSierra on this SSD 840. But, as soon if I reboot from the SSD 840 which was formatted as HFS+, and use Get Info, it tells me that the format is : APFS. That is weard though ???

So the question is: How can I force it to HFS+ again ?

Thanks in advance.
Click to expand...

https://www.tonymacx86.com/threads/...n-high-sierra-update-or-fresh-install.232855/
 
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