> > Hm... And redundant environment is not safe enough for you? I don't know much about redundant env but now that you mention it ... I do remember seeing something about that in the code. I'll look into it. Thanks!
> >> The goal is to not brick a device during a upgrade. Whatever bank you >> are running out of, you upgrade by flashing the bank not being used. >> Once a bank has been upgraded, if I want to select that bank to boot >> ... I would need to modify a environment variable but if it is stored >> in flash then while that sector (a 256k sector in my case) is being >> updated ... if power is lost I just hosed myself. If the environment >> variable I update was stored in EEPROM, then it would be closer to an >> atomic action that couldn't be interrupted with say a power failure. > > EEPROM is not a bit more reliable than NOR, on contrary (read for > example doc/I2C_Edge_Conditions - unless you write-protect your EEPROm > in hardware it is actually way less reliable). I've seen that document and have raised the issues (and discussions I found about it in the archives) to those that "really" want to use the EEPROM. I guess when I first thought about this I had sector erase time of flash vs hitting a single byte of the EEPROM but I wasn't thinking of the I2C transaction. That realization hit me right after I hit send and realized what I posted was heading in the weeds. > > And redundant environment should cover your use case just fine. Cool! I will surely read all I can on it. > >> So what I'm asking about is a Hybrid environment were some variables >> are in flash and some are in EEPROM. The env is read from both >> locations and saveenv writes some vars in flash and some in EEPROM. >> With the current u-boot code I have (1.1.6) the environment choices >> are mutually exclusive (flash, eeprom, nvram etc.) > > This makes little sense to me. Thanks for being gentle. I had temporary insanity. Regards, Brian _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
