On Tue, 2022-12-27 at 11:31 +0100, Nicolas George wrote: > Tixy (12022-12-27): > > The card could know what blocks of flash have been written to, it's the > > thing that has done the writing. > > Indeed. And as I said already, unless the card is pathologically > underused
You said 'unless the card is brand new' > , “what blocks of flash have been written to” eventually > becomes “all of them”. Only in the case where the SD card has at some point been completely full, and you maintain cases where that isn't true is 'pathological'. Guess my storage uses are pathological then, because apart from the extreme example of that restricted 4GB partition I use for a root filesystem, my other 'normal' usage doesn't fill removable flash storage either. E.g I copy images and videos from my digital cameras to my PC then delete them from the cameras, and the backup storage on my keyring I carry around isn't full. (Backup storage performance falls badly as it fills, presumably due to lack off readily available erased blocks, so that tells you to go buy a bigger flash stick :-) -- Tixy
