Interfaces & linear scale for LinuxCNC

At the error, remove the USB device and wait 5 seconds, insert again the USB and wait 15 seconds, click on YES and next.
Usually that works for this, well almost always.
In case it does not work for you:
Download and install Linux Mint Debian Edition, update and upgrade, then
sudo apt install linuxcnc-uspace
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Warning, this might not be the best option for parallel port use as it might end up with quite high latency.

SSD will improve latency a bit, but adding more RAM would also help, 8GB is just fine, but i do not recall how much you already have.

langdons wrote:

SSDs are overrated.

What is that supposed to mean? Any SSD is MUCH faster than a spinning hard drive, so how is this "overrated"

langdons wrote:

They are mostly good for Windows because NTFS has fragmentation issues.

They are good for all operating systems, not just Windows.

langdons wrote:

They do reduce boot time, but that is not really useful.

It is useful for everything that needs to be transferred from SSD to system RAM and back, especially when starting any application or closing it, or...

langdons wrote:

RAM is faster than any SSD, even "slow" DDR 866MHz is faster.

Not a valid comparison so why????

langdons wrote:

Make sure your RAM is dual-channel.

Yes, this is valid, but requires 2 or 4 sticks of RAM, same size, otherwise it defaults back to single channel.

langdons wrote:

You can get double speed with no drawback.

Not true, you get more speed, but never double speed, timings, latency, clocks, and some probably 50 more settings and parameters that prevent memory form physically reaching "double speed".

langdons wrote:

Why not?

Now i must ask, Why?
Why do you keep replying like this?
Again, i admire your will and effort to help others, and some times you do help so thank you for that, but sometimes your replies are like this causing more confusion and noise that is not helpful.