15 May
2014
15 May
'14
9:07 p.m.
On 5/15/2014 2:50 PM, David Riley wrote:
That is really excellent, especially for those of us
with machines that
have built-in SD readers (which are often quite fast).
Yeah, I think this is discussed on the other thread too (and I mentioned
it originally), but it's a point worth repeating:
Let's say you want to back up your logic analyzer drive. Just pop out
the sd card, and plug it into your regular PC. Image the whole thing
using dd, pipe it through gzip or similar, and then store the image.
Then, let's say you're messing around with the configuration, and screw
everything up, bam --- just reflash the sdcard with the original image,
and bob's your uncle.
I don't know what the lifetime on these flash cards are, but you could
also replace on nearing end of life.
Yeah, a logic analyzer has some real bandwidth
requirements.
Well yes and no. The main problem with the speed of the flash is just
that the OS is stored on it, and there's plenty of accessing when moving
through the GUI. The HP 16700A and similar units have a fully blown
multitasking windowed OS. So when you load one screen, or go to another,
or whatever, you're hitting the disk.
The actual capture happens all in memory, there's nothing (AFAIK)
streaming to the disk.
Really cool. So glad someone stepped up to the plate
and did this!
The guy who ships has it more right than the guy who spends forever
overoptimizing it and never getting it out the door.
Yes, me too! If I have to buy another one down the road, that's fine
with me....next gen hardware or whatever.
I think in terms of future proofing, getting rid of spinning rust is a
pretty high priority, and I like modern solution meets retro computing
even if it's not fully optimized, yet.
Thanks
Keith