https://imgur.com/a/151sZ
Copying a 19GB MKV test file from a sata hfs drive to zfs mirror, the performance is constantly up and down.
Versus the same file copied to another sata hfs drive where the write speed remains nearly constant.
I created the pool using this command:
- Code: Select all
sudo zpool create -f -o ashift=12 -O casesensitivity=insensitive -O normalization=formD $poolname mirror diskX diskY
Available RAM does not change during the copy.
CPU use is low
Copied the same 19GB file a 2nd time with much better results-- still with periodic drops to zero.
The finder is hanging. Any thoughts on what is causing this? The symptoms seem to fit with it being an alignment problem. As mentioned above I used the recommended ashift=12. The drives are advanced format 512e.