Bill McClain

Did you sync after the touch? The sub-second timestamp is an optimization feature to help identifying moved or copied files. Your files are protected even without it. From the manual: This improves the SnapRAID capability to recognize moved and copied files as it makes the time-stamp almost unique, removing possible duplicates. More specifically, if the sub-second time-stamp is not zero, a moved or copied file is identified as such if it matches the name, size and time-stamp. If instead the sub-second...

Did you sync after the touch? The sub-second timestamp is an optimization feature to help identifying moved or copied files. Your files are protected even with it. From the manual: This improves the SnapRAID capability to recognize moved and copied files as it makes the time-stamp almost unique, removing possible duplicates. More specifically, if the sub-second time-stamp is not zero, a moved or copied file is identified as such if it matches the name, size and time-stamp. If instead the sub-second...

You have 6TB of parity, not 6 + 4. The 6TB will protect any number of disks as long as they are 6TB and smaller. (Later you will add more parity disks for safety, as described in the FAQ). With 1 parity disk you can recover from the loss of 1 disk, data or parity. If you lose 2 disks at once you are in trouble. "if I create a system with 6+4+4tb of data (14tb) and 6 tb of parity, how much space I will have for data, considering only 6tb of parity?" You will have 14TB of data space. The parity disk(s)...

1 parity disc can protect any number of data disks, although as the number of discs grows you want more parity to protect against simultaneous disk failure. Number of parity disck = number of failed disks you can recover from. The FAQ has recommendations for the number of parity disks. It works because all the data disks cooperate when parity is calculated and all will cooperate if you need recovery. Articles on raid and parity will have details and diagrams. The parity disk(s) must as large or larger...

It's a recommendation, not a requirement. You are at risk of losing data if more than one disc fails at the same time.

I don't think 4 is possible. I would do 2, which I would call "simple". You'll be upgrading the 8TB someday and the larger parity will be ready for you.

As long as the largest amount of data on one of the 8tb drives does not excede 5tb, it would work.

That is how I understand it. If 3p fail you can recreate them from your data disks, but are unprotected against data disk failure until that completes.