Two identical systems with matching cards but small diff in size???

MoreBloodWine · September 30, 2019 at 5:12 AM

This is a quick curiosity, nothing I'm really concerned with. But with two rPi systems, both of which have 64gb SD cards.

Why might they all be showing exact the same but the 57.1 / 57.8 fields ?

Especially when both cards were set up thenexaxt same way ?

Again, this isn't something I'm concerned with but more curious about.

**Klojum** · September 30, 2019 at 12:49 PM Official Post

The one with more free disk space probably has not cached all possible thumbs yet.

**vpeter** · September 30, 2019 at 1:07 PM

Even if the cards are declared same size they have different actual size. The difference can vary to even 1 GB.

It is nothing to worry

That's why making SD card image and restoring to another card doesn't always work.

MoreBloodWine · September 30, 2019 at 1:43 PM

Quote from Klojum

The one with more free disk space probably has not cached all possible thumbs yet.

Peter kind of nailed it better I think. Didn't consider that. But of you look at what I posted. It's the "total size" regardless of what is or isnt used thst I questioned.

Re peter.

I dont do images so not much to work about.

Ex. 64 backup to a 32 disk dont matter if the backups only like a gig.

**Da Flex** · September 30, 2019 at 2:22 PM Official Post

Some SD cards, I think the most, have their own error correction system. So bad blocks will be sorted out, and the card still works with now less total memory.