HP41 Card Reader bug in conjunction with X-Memory

[Sylvain Cote]

(08-01-2019 05:31 PM)Thomas Okken Wrote:  One time, I unplugged it from my Mac, without unmounting it first. After that, the Mac wouldn't mount it any more, until I inserted it into a PC.

Unix systems (Mac, BSD, Linux, Unix, etc) in general does not support well removing a mounted volume without un-mounting it first, the main reason is that volumes cache is enabled by default.
To my knowledge, macOS does not have a way to change that default behaviour. (other Unix systems can be configured through the /etc/fstab and /etc/mtab files)
If you use the command line, you can unmount the volume and remount it without the cache (activating synchronous I/O) and thus be more resilient.
Sylvain