By trial and error I am working towards not receiving an RPCError
I've posted about this before but am unskilled about mounting devices, file systems and fstab.
The LuCI error page is posted below.
root@OpenWrt:/etc# service fstab boot
block: unable to load configuration (fstab: Parse error (invalid command) at line 15, byte 0)
block: no usable configuration
BUT
root@OpenWrt:/etc# mount -a
mount: mounting UUID=e8577c39-a69c-4a4e-8717-26de715249ec on /mnt/sda1 failed: No such file or directory
ls -l /dev/sd*
/dev/sda1: UUID="e8577c39-a69c-4a4e-8717-26de715249ec" LABEL="OpenWRT500" VERSION="1.0" TYPE="ext4"
other devices appear, too, but they are not showing errors under mount -a.
I do not really know, but the OpenWRT page for using USB devices, makes you write a filesystem to it, which wipes the files. I transferred (years of collected) movies to the desktop 'puter and ran the commands on that page. That causes the RPCError to not appear, but rather the proper LuCI mount points page and info.
I apologize to you. I'm in my 70s. Sometimes, the easiest method is the best one for me, as I'll see output of cli to run and then try to chase it down in terms of the problem at this forum or on Google. That causes me to chase down a rabbit hole.
Thank you, OpenWRT community. Again.