On Friday, January 16, 2015 at 05:50:18 AM, Stefan Roese wrote: Hi!
> >> Would it make sense to make environment bigger (64K?) at this point, > >> and enabling the redundant environment option, so that one bad block > >> does not bring the whole device down? > > > > Do you think you'll ever have more than a 4KiB of text data in the env ? > > I have used bigger environment in some cases. > > > I can see a reason for some 16 KiB environment, but that's the ceiling. > > Then lets switch to at least 8KiB please. > > Pavel, would be 8KiB enough for your project? > > > Usually, the env only has to be a few KiB and it's size has to be > > multiple of the underlying device's erase block. But in case of SD card, > > there are no explicit erase blocks exported to the user, all is hidden > > by the controller in the SD card and gives an illusion of a device which > > has 512b blocks and the user doesn't care for bad block management. > > Since the controller in the card does the bad block management and wear > > leveling/relocation of blocks, it also means that in case the controller > > did fail to provide the block which contains env, the whole card would > > already be in a very bad state. > > Right. Nevertheless it makes sense to support the redundant envrionment > (at least from my point of view), regardless of the device the > evironment is stored in. Thinking for example about power-supply failure > (power-cut) while writing into the one envrionment version. That's a fine idea, you're right :) Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
