Re: [gentoo-user] Memory cards and deleting files.

[antlists]

On 22/06/2020 21:42, Neil Bothwick wrote:
> On Mon, 22 Jun 2020 20:40:49 +0100, antlists wrote:
>
>>>> Warning 2: I did exactly that, and it LOOKED like it was working
>>>> happily, until it overflowed some internal limit and my 1G card
>>>> turned into a 128M card or whatever it was. Have you actually TESTED
>>>> that card IN THE DASHCAM and made sure it can actually use that
>>>> 128G? Or will it only be able to use 4G of that card?
>>
>>> There are a lot of SD cards with fake capacities, they appear to be
>>> large but are actually a smaller card reprogrammed to do so. You only
>>> find out when you go beyond the true capacity. There are tools to
>>> check this, such as sys-block/f3.
>>
>> Did you look at the card sizes I quoted? :-) I think the reason I tried
>> a 1GB card was because the camera said it took a max of 512MB. It
>> didn't work ... (Oh and the card was good. It was small by the
>> standards of the day.)
>
> So that was SDHC vs SD? Or was it even that? 2GB was the original SD
> limit IIRC correctly,

You don't iirc correctly :-) but it was the limit for cards that were 
manufactured, for the most part. By the time 4GB cards became common, 
the SDHC spec was out, and most (all?) 4GB cards were SDHC. Right pain 
if your device had an SD reader, because they couldn't read SDHC cards 
:-( You could stick an old SD card in a new SDHC reader, but not the 
other way round.

That's why nearly all cards nowadays are 32GB min - that's the smallest 
SDXC size.

> so you weren't trying to use the wrong spec. Was it
> just a case of a faulty card, either through accident or design.

It wasn't - I can't remember what it was, but it was some Olympus format 
that - iirc - only fitted Olympus cameras. And it was something along 
the lines of the smallest cards available were larger than the max 
capacity of the camera I wanted it for (that camera might actually still 
be in use ... :-)
>
> However, those cards were more expensive than current huge cards, so the
> temptation to sell fakes would have been even greater. Many years ago I
> got burned like that with a large (for the time) capacity USB stick
> bought on Ebay.
>
Cheers,
Wol