Products > Test Equipment
New Rigol DS1054Z oscilloscope
Fungus:
--- Quote from: mwb1100 on May 16, 2023, 06:09:19 pm ---The red screen problem has been around for a while (no idea how frequent it is). See https://www.eevblog.com/forum/testgear/rigol-red-screen-of-death/
--- End quote ---
"Very infrequent" is my guess.
In that thread it says it's related to the NAND flash. :)
https://www.eevblog.com/forum/testgear/rigol-red-screen-of-death/msg1451303/#msg1451303
PawelW:
Maybe they are replacing those faulty nands with other manufacturer NAND and this is a reason why this version has new drivers.
Njk:
It's not a cultivated memory device like eMMC. Rigol still uses raw NAND Flash chips so it's the programmer's burden to perform error handling, bad block management, wear leveling. Longevity of the product depends on how well it is implemented. Only Rigol knows the actual quality of its SW in that regard. In worst case, first bad block appearance results in device failure. "solve the problems of red screen when booting" might mean improvement in Flash housekeeping code.
smithnerd:
--- Quote from: Njk on May 17, 2023, 04:11:19 pm ---It's not a cultivated memory device like eMMC. Rigol still uses raw NAND Flash chips so it's the programmer's burden to perform error handling, bad block management, wear leveling. Longevity of the product depends on how well it is implemented. Only Rigol knows the actual quality of its SW in that regard. In worst case, first bad block appearance results in device failure. "solve the problems of red screen when booting" might mean improvement in Flash housekeeping code.
--- End quote ---
I reverse engineered a fair bit of the DS1054Z firmware, including the NAND filesystem code a few years ago. I can't comment on recent firmwares, because I haven't looked at them, but I was left with the impression (on 00.04.04.03.02, I think) that the flash handling was somewhat basic. This code was present in both the bootloader and the application firmware:
https://github.com/rickyzheng/uffs
TurboTom:
In their "mature" instruments, Rigol stores frequently altered data in a separate FRAM chip that's virtually inert against write wear. Not sure for all their recent gear, but at least the DG800/900/2000 series of AWGs still contains an FRAM chip (MB85RC16).
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