FORUMS: list search recent posts

SxS 16gb CARD only 80% capacity why?

COW Forums : Sony XDCAM - EX & Related

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Din noor
SxS 16gb CARD only 80% capacity why?
on May 8, 2009 at 8:31:22 am

Guys,
could anyone tell me why does my card only be able to go up to80% capacity of its actual storage space?

thks
Din


Return to posts index

Don Greening
Re: SxS 16gb CARD only 80% capacity why?
on May 8, 2009 at 8:41:04 pm

Probably because the formatted capacity of any storage device, whether it be solid state memory cards or computer hard drives will always be less than the advertised unformatted capacity.

- Don


Return to posts index

Craig Seeman
Re: SxS 16gb CARD only 80% capacity why?
on May 8, 2009 at 9:03:16 pm

Yes, seems to be about 14.9GB on 16GB cards.



Return to posts index


Dean Sensui
Re: SxS 16gb CARD only 80% capacity why?
on May 9, 2009 at 7:05:46 pm

Drive capacity is marketed by taking the number of available bytes and dividing by one billion to get "gigabytes".

However, technically there are more than 1.073 billion bytes in a gigabyte. About 7 percent fewer gigabytes.

Would be nice if storage media manufacturers would be a bit more honest and use the actual definition of gigabyte in their specs.

Part of the drive is reserved for the operating system and is unavailable for data storage.

Finally, hard drives are broken up into "sectors" consisting of a fixed number of bytes. A video clip will span a lot of sectors but often leaves one last sector only partially full. The next clip can't use the "leftover" bytes in that sector and can only start on a new unused sector. So there's always unavailable capacity on any storage medium.

These three things probably add up to your 15 to 20 percent difference in rated vs actual capacity.

Dean Sensui -- Hawaii Goes Fishing


Return to posts index

Claudio Sandalo
Re: SxS 16gb CARD only 80% capacity why?
on May 13, 2009 at 11:22:08 am

I think it depends of what are the pictures recorded, I normally see 80% used and total time of recording was 62-63 minutes(with many hundred of clips recorded), but when I recorded static scenes with not many clips, the total time of recording was max. 78 minutes and less space available.


Return to posts index

Dean Sensui
Re: SxS 16gb CARD only 80% capacity why?
on May 13, 2009 at 4:33:30 pm

[Claudio Sandalo] "I think it depends of what are the pictures recorded, I normally see 80% used and total time of recording was 62-63 minutes(with many hundred of clips recorded), but when I recorded static scenes with not many clips, the total time of recording was max. 78 minutes and less space available."

That's a good example of how a lot of shorter clips can leave a lot of partially-filled sectors. Whereas a few long clips will fill entire sectors and won't waste as much of the card (or hard drive) capacity.

Dean Sensui -- Hawaii Goes Fishing


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]