Re: @AC - The SFC can kiss my taint...
I use ZFS on Linux but my rationale might be the same - I use ZFS because I value my data and I value my money. The first should go without saying but the second requires some explanation.
I need to be able to use RAID5 - RAID1 doesn't cut it in terms of how many droves I need. This means Btrfs is not an option. I am a huge fan of Btrfs because it offers some features that ZFS doesn't (also the other around of course) but I don't trust its RAID 5/6 implementation. Wheres ZFS is rock solid.
Then there's the caching support - I can configure an SSD as L2ARC cache without much hassle and have my huge (raltively) HDD array perform as well as an SSD after the cache has been warmed up (caveat emptor - on Linux the cache starts from zero after reboot)l. But with ZFS you can configure the cachine behavior per dataset (whether the ARC and/L2ARC cache metadata, metadata + data or none).
I have a friend who runs an 8-disk RAID-Z1 array with a 9th as hot spare and 6 Optane drives for cache. I did set it up for him and it only took like 5 min. Generally, ZFS is very easy to set up and maintain once you've wrapped your head around it. And the flexibility is great. As long as you don't have to shrink your zpool...
BTW, there are many important ZFS feature additions in the pipeline. I think adding a drive to a RAID set is one of them.
Biting the hand that feeds IT
