Has anyone tried to upgrade their HDDs from HFS+ to APFS? Any downsides or problems if you did?
I am quite curious if t would be worth upgrading my four HDDs on the 2012 Mac Pro.
That would be disappointing. I was hoping to use it on my 10 TB drives - to prevent against bitrot.As APFS is optimised for SSD it might actually flood a spinning harddisk with commands and result in a lower performance than HFS+
You can't. The option isn't there. I believe APFS is for SSDs only.Does an install of High Sierra offer, or force, a conversion of existing HDD to APFS?
Has anyone with HDD done a seamless conversion to APFS without destroying their current macOS in use?
APFS will support HDDs, but it currently does not in the first beta. You can still force enable it with various Terminal commands though, but it isn't pretty to do.
That's because you have a Fusion drive, which is a supported auto-convert scheme. A plain HDD is not currently supported in some cases to auto-convert to APFS.
As APFS is optimised for SSD it might actually flood a spinning harddisk with commands and result in a lower performance than HFS+
That would be disappointing. I was hoping to use it on my 10 TB drives - to prevent against bitrot.
There is nothing in APFS to prevent or detect bitrot. There is some checksumming on metadata (as most modern file systems), but nothing on user data. Apple assumes data never is corrupted and the storage system never returns bogus data by claiming the hardware takes care of any such event (i.e. the EEC correction and such standard build-in features on SSD's)
… slides for the APFS session,
it has a new defragmentation process for HDDs …
highsierra:~ grahamperrin$ date ; uptime ; sw_vers
Sun Jun 11 22:00:37 BST 2017
22:00 up 3:22, 2 users, load averages: 0.79 0.63 0.68
ProductName: Mac OS X
ProductVersion: 10.13
BuildVersion: 17A264c
highsierra:~ grahamperrin$ ioreg -c IOHIDSystem | awk '/HIDIdleTime/{print $NF/1000000000;exit}'
554.539
highsierra:~ grahamperrin$ ioreg -c IOHIDSystem | awk '/HIDIdleTime/{print $NF/1000000000;exit}'
651.932
highsierra:~ grahamperrin$ iostat -dIw 1
disk0 disk1
KB/t xfrs MB KB/t xfrs MB
1.79 594 1.04 11.64 1825293 20751.81
0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 0.00 0 0.00
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
disk0 disk1
KB/t xfrs MB KB/t xfrs MB
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
disk0 disk1
KB/t xfrs MB KB/t xfrs MB
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
0.00 0 0.00 7.48 23 0.17
^C
highsierra:~ grahamperrin$
The installer has an option to format the drive or not.Does an install of High Sierra offer, or force, a conversion of existing HDD to APFS?
Has anyone with HDD done a seamless conversion to APFS without destroying their current macOS in use?
The installer does not offer the option if you only have an mechanical HDD.The installer has an option to format the drive or not.
The installer does not offer the option if you only have an mechanical HDD.
Might try it. Beta 2 hasn’t made any difference on my early 2011 MacBook Pro. It still lags like hell and has horrible memory usage. Do you think converting the drive would help?Correct. But if after the upgrade you boot into recovery, you can choose to convert your disk in disk utility, even if it is a HDD
That would be disappointing. I was hoping to use it on my 10 TB drives - to prevent against bitrot.