Recently after some updates I came up with an error when trying to mount a ntfs partition (where I usually save my shared data with windows). On Dolphin it doesn’t explain anything about the error but I ran the mount command on terminal and what I got is this:
/usr/bin/mount.ntfs: error while loading shared libraries: libhd.so.21: cannot open shared object file: No such file or directory
Unfortunately I was not able to find much information about this missing library or how to solve the issue.
Have look here:
pamac search --files libhd.so
hwinfo is not installed or simply out of date… Currently I have libhd.so.22 
The command returns this
/usr/lib/libhd.so es de hwinfo
/usr/lib/libhd.so.21 es de hwinfo
/usr/lib/libhd.so.21.75 es de hwinfo
Actually that seems to be the issue
I have also the newer versions
/usr/lib/libhd.so
/usr/lib/libhd.so.22
/usr/lib/libhd.so.22.1
But it seems that mount is requesting the *.21
I have no idea how to solve it
Guess your mirror is out of date or you simply switched branches and didn’t downgrade…
sudo pacman-mirrors -c Germany
sudo pacman-mirrors -f 5
pamac update --force-refresh --enable-downgrade