I'm using Arch Linux on my Raspberry Pi, though I'm not sure that's relevant.  I followed this tutorial to set up a RAID 1 array with 2 USB HDs.  I then mounted the array (md0) in /media.  What I can't find is how to write to this array.  Do I write to /media/md0?  Or do I write to one of the disks and mdadm then copies it to the second?  md0 has only root write privileges.  When I wrote a test file to it, it creates the file like it would for a normal file system, but I don't see that file when I cd to the disks.  Shouldn't I be able to see the file on the disks?Below is the output of mdstat, which is how the tutorial suggests to monitor the disks:$awk '/^md/ {printf %s: , $1}; /blocks/ {print $NF}' </proc/mdstatmd0: [_U]
How to write to RAID 1 disks on Raspberry PI
filesystems;raid