SSD cache wouldn't be useful I think. I'm under the impression at least I wouldn't see any faster transfer speeds, since the cache is really only effective for accessing the same small amount of data repeatedly like a web server. I'm rarely if ever doing that. So I saved some money and went to github:
I'm using a UGREEN USB adapter to get 2.5. Almost zero issues, except I have make sure to update the driver before DSM updates. I've had instability the one time I updated DSM first.
The 2.5GbE upgrade is totally worth doing even before upgrading other equipment - I get full speed when connected directly to my PC, and it makes a huge diffrence for backups.
I did set it to "faster" yeah. It's not slower than expected, it's just novel to me how long it takes lol.
You're right about storage space but I'm not sure why yet. Some of it will be Btrfs overhead according to web searches. This NAS model I think has some limitation of 108 TiB max pool size, but I'm below that so...idk yet. Plus others said that limitation was if you were on stock 4 gigs of RAM. Mine has 32, it's doing more than just storing files but it's still over kill. Was just on steep discount.
Maybe I'll be able to expand the volume again once it's done the final scrubbing?
Some of it will be Btrfs overhead according to web searches. This NAS model I think has some limitation of 108 TiB max pool size, but I’m below that so…idk yet. Plus others said that limitation was if you were on stock 4 gigs of RAM. Mine has 32
That's strange, but none of that should matter.
I'm getting the exact value from the raid calculator:
And I'm actually hitting the 108 TB limit, but that's only for the volume, the storage pool can be larger. I've also upgraded my RAM.