Interfaces & linear scale for LinuxCNC

Works, thanks

I just ordered a SSD for this old computer. Now that I know it's working, I would like to speed it up
Will this also improve latency for linuxCNC or doesn't it matter, since everything is stored in RAM?

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.

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SSDs are overrated.

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

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

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

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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...

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

Not a valid comparison so why????

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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.

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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".

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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.

Looks like HDDs do have interrupts since they are slow and do need the OS to wait for datatransfers.
I'll see if the latency-test will get better or worse when the SSD will arrive

Some errors here, anything over 4Gb of RAM is wasted on Linuxcnc. (2gb is probably enough if you can buy it today!)
Disk access has no impact on latency.

A more extensive real time latency test suite is included as standard in Debian (and most distros): sudo apt install rt-tests
and nothing in it mentions HDD or SSD
wiki.linuxfoundation.org/realtime/docume...howto/tools/rt-tests

I have the magnetic linear encoders (MSR5000) in front of me. Next to the magnetic (10mm width) tape is a steel tape (10mm width), so which standard aluminium profile would you suggest for mounting it?