Why do we have Class 10 support?

W

WpgCameraMan

Well-known member
Why does Panasonic care to support Class 10 SDHC cards in the 150 ? Especially so early in the product's life?

Already Class 4 is more than enough, and anything more than 32 GB might require internal hardware changes.

I find it odd. Surely Class 10 cards larger than 32 GB will represent a minor market until prices come way down, and that will take years. By then, We'll have SSD's in the Terabytes, and something more attractive than SDHC will come along.
 
They support it because -- why not? It doesn't hurt anything, and if the customer buys a class 10 card, why shouldn't she/he be able to use it?
 
class 10 cards

class 10 cards

Class 10 cards are also a good bit faster than Class 4 or Class 6, are they not? Is there any enhanced reliability with higher class numbers?
 
icon1.gif

FAT32 is limited to 4GB per file.

Isn't FAT64 limited to 8GB per file?
Click to expand...

Nope Fat 64 limit is more like 4GB squared ( vs. times two) so it's in theory thousands of terrabytes and I think in practice several hundred terrabytes.
 
Ummm... 4 squared = 16 (which is still an improvement)
Click to expand...
Don't forget the zeros

4GB ~ 4,000,000,000 bytes

so 4 GB squared doesn't equal 16 GB or 16,000,000,000

rather 4,000,000,000 x 4,000,000,000 = 16,000,000,000,000,000,000 = lots

Actually I just saw in Wikipedia that the recommended max file size for fat64 is 512 Terabytes... probably enough to make do for a while.


Back to the original question... I would much rather have a company building in future capabilities than limiting the lifetime of the product.
 
Last edited:
i for one, don't have any issues with the 4gb limit...in fact, it can work to my advantage when i have to transfer files between a PC and a Mac as i have to resort to FAT32 as the only common file format. unless both PC and Mac support FAT64, then i don't care. also, the 4gb limit is helpful when burning dvds....not everyone has double-layer or bluray.

also, one of the overlooked advantages to having a faster sd card is for faster offloading to your computer. heck, with a class 10, you could edit straight on the card (as if you'd want to do that).
 
He's saying 4 gigs times 4 gigs is 16 gigs. This is true
Click to expand...

Sorry to continue off topic... but no this isn't true. This might be true if a Gig was some kind of real unit, but it's simply a convenience shorthand for a big number. gig is aprox 1 billion.
There is a big difference between multiplying 4 billion by 4 (which is 16 billion or gig)
and multiplying 4 billion by 4 billion.

One other way to look at this... How many 4 gig memory sticks do you need to buy to have 16 gig? only 4 not 4 billion. so 4 billion 4 gig memory sticks is a whopping more than 16GB

Anyway, the file size limitation for class 10 is way bigger than any current physical device and I don't think my battery will run that long :embarasse
 
capt chuck said:
Sorry to continue off topic... but no this isn't true. This might be true if a Gig was some kind of real unit, but it's simply a convenience shorthand for a big number. gig is aprox 1 billion.
There is a big difference between multiplying 4 billion by 4 (which is 16 billion or gig)
and multiplying 4 billion by 4 billion.

One other way to look at this... How many 4 gig memory sticks do you need to buy to have 16 gig? only 4 not 4 billion. so 4 billion 4 gig memory sticks is a whopping more than 16GB

Anyway, the file size limitation for class 10 is way bigger than any current physical device and I don't think my battery will run that long :embarasse
Click to expand...

You're totally right. I was thinking completely wrong. Usually I'm pretty good at that sort of thing. Oh well.

16,000,000,000,000,000,000.. Or rather, 16 quintillion bytes. Which is really, really a lot. And yeah, I know it isn't really even with the zeros, but it's a lot easier that way.
 
You must log in or register to reply here.
Back
Top