No, it’s the general term, as opposed to GUI (graphical user interface). Linux Shell, Windows command prompt and Powershell are all CLI

I wear a fez now. Fezzes are cool.

6 is preferable over 5 because with today’s disk sizes, swapping in a new drive and resilvering it (full disk write basically in terms of amount of data) takes so long that statistically you might just encounter a second failure during that, which for raid 5 would mean complete failure of the array.

Of course, that’s just an uptime issue, since raid is not backup.

I’m sorry John.