26th September 2004, 01:28 AM
the true size of a CF card
i would like to ask something...
wat is the true size of a CF card...
cos i just bought my card...n my card after formatting is only 488mb...the card is a 512 card...
is it anything wrong with it...
how come will like tat...care to explain...it is over 20mb lost lerh..
26th September 2004, 01:43 AM
storage manufacturers' convention is to advertise 1k = 1000, while file system convention is 1k =1024.
so 512mb advertised = 512,000,000b
while actual space is actually 512,000,000 / (1024*1024) = 488mb
26th September 2004, 01:45 AM
it is normal
Originally Posted by p4610yz
when you buy HDD also ma
industry and window standard is different
industry 1000 Byte= 1KB , 1000 KB = 1MB
window 1024 Byte = 1KB, 1024KB = 1MB
yes they eat your ram but had use to it la
Last edited by latmo; 26th September 2004 at 01:49 AM.
27th September 2004, 12:06 AM
Volatile storage (e.g. RAM, cache) and non-volatile storage (e.g. HDD, CF, SD) have different and misleading size definitions. Look at the small print of Dell advertisments, they will always tell you 1 MB = 1,000 bytes.
For volatile storage and computer science definition, 1 KB = 1,024 (2^10) bytes, 1 MB = 1,024 KB, 1 GB = 1,024 MB and so on.
For non-volatile storage and HDD manufacturers definition, 1 KB = 1,000 (10^3) bytes, 1 MB = 1,000 KB, 1 GB = 1,000 MB, etc.
27th September 2004, 09:16 PM
erm....this person got the same problem as me...this website
but he is able to solve it...
how come i can't..
i format the card on my camera also no use....
it still remains at 488mb..instead of a 512mb...
so wat is the problem...anyway m i able to do a exchange..cos the card got a 5 yr warrenty right...it is a lexar card....erm...where can do>???
erm...Ah Pao...so the CF card should read a true 512mb right??
help me thanz...
27th September 2004, 11:58 PM
Nope. CF is a non-volatile memory, i.e. contents not lost when power supplied to memory is cut off.
CF follows the 1MB = 1,000KB rule.
28th September 2004, 12:29 PM
so...it is tat the card should read a 488mb not a 512 is it.>??
28th September 2004, 12:40 PM
hi, seems that the detailed explaining by the above forumers hasn't been fully understood. in short, yes, it should be 488mb, or whatever, and not 512mb.
to make it easier to understand, let me put it another way, if i were to see 512mb on my camera with today's technology, i will be surprised.