Decimal & Binary GB's - Club CDFreaks

**FutureProof** · 03-07-2002

Um, this is not Rocket Science but someone asked (can't find the post) why they 'lost' some GB's on their new HDD.

Marketers are liars! Bits, bytes & MegaBytes are counted in 10's when we all know that 1024KB = 1 MB, here a little conversion table

Format GB
Decimal 200.00
Binary(1024) 186.26

Decimal 180.00
Binary 167.64

Decimal 160.00
Binary 149.01

Decimal 140.00
Binary 130.39

Decimal 120.00
Binary 111.76

Decimal 100.00
Binary 93.13

Decimal 80.00
Binary 74.51

Decimal 60.00
Binary 55.88

Decimal 40.00
Binary 37.25

Decimal 20.00
Binary 18.63

Decimal 12.00
Binary 11.18

Decimal 10.00
Binary 9.31

Decimal 6.00
Binary 5.59

Decimal 2.10
Binary 1.96

Decimal 1.20
Binary 1.12

**philamber** · 03-07-2002

Quote:

Originally posted by FutureProof
Marketers are liars! Bits, bytes & MegaBytes are counted in 10's when we all know that 1024KB = 1 MB,

Aint this the truth. What, you don't believe fp. Well put a blank so-called 100mb zip disk into your zip drive and then open explorer or my computer to see what the zip disk really holds (you can forget all about storing 100mb of data on it).

Chewbacca · 03-07-2002

CD space isn't decimal right?

**FutureProof** · 04-07-2002

Quote:

Originally posted by Chewbacca
CD space isn't decimal right?

No the OS and file structure tells you what's on there. 1024KB = 1 MB

Chewbacca · 04-07-2002

yes of course the FAT file system states 1024 is 1 kbyte but are 700mb cds caculated using 1000=1 kbyte or 1024=1 kbyte? I'm talking about how HDD's are calculated using =1000 but when you format it its really =1024

*ckin2001* · 05-07-2002

hard drives are calculated using 1024k=1mb, but sold using 1000kb=1mb. cd's, 700mb=700mb=700*1024kb, more or less

Fallen · 06-07-2002

Then again, there ARE those CDs that are sold as "680MB/74Min" and "730MB/80 min", but still only fit the normal 650/700MB. THOSE have their "box" space calculated by 1MB = 1000k = 1.000.000 bytes.

**FutureProof** · 06-07-2002

CD-R standards are minutes.

Audio gets more minutes than data because of less EDC/ECC

**philamber** · 06-07-2002

According to Britannica, a standard cd (i.e. 650mb/74 min) actually holds 680mb which explains why you can always overburn them to some extent. The same doesn't hold true for 700mb/80 min cds however. Whilst some of them hold a little more than 700mb, it usually isn't much and some actually hold slightly less.

Fallen · 06-07-2002

@FutureProof: You probably meant "More MB per minute", right? But even so, it would not equate to 680/74, more like 740/74. But yes, the standards really are the minutes, and the manufacturers print whatever they find better for them on space.

@Philamber: Odd. Somehow I doubt it... Anyway, my best overburner is a 80' CD, my Princos, they hold an extra 04:52.60 without errors, amounting to 746MB.

**philamber** · 07-07-2002

Quote:

Originally posted by Fallen
@Philamber: Odd. Somehow I doubt it... Anyway, my best overburner is a 80' CD, my Princos, they hold an extra 04:52.60 without errors, amounting to 746MB.

Maybe princos give you more space than most, awful discs btw, but many 80min cds don't have any excess capacity.

03-07-2002	#1 (permalink)
FutureProof Senior Admin Join Date: Oct 2001 Location: True Blue Posts: 5,606	Decimal & Binary GB's <a href='http://adstats.cdfreaks.com/www/delivery/ck.php?n=a13febf7&cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://adstats.cdfreaks.com/www/delivery/avw.php?zoneid=30&cb=INSERT_RANDOM_NUMBER_HERE&n=a13febf7' border='0' alt='' /></a> Um, this is not Rocket Science but someone asked (can't find the post) why they 'lost' some GB's on their new HDD. Marketers are liars! Bits, bytes & MegaBytes are counted in 10's when we all know that 1024KB = 1 MB, here a little conversion table Format GB Decimal 200.00 Binary(1024) 186.26 Decimal 180.00 Binary 167.64 Decimal 160.00 Binary 149.01 Decimal 140.00 Binary 130.39 Decimal 120.00 Binary 111.76 Decimal 100.00 Binary 93.13 Decimal 80.00 Binary 74.51 Decimal 60.00 Binary 55.88 Decimal 40.00 Binary 37.25 Decimal 20.00 Binary 18.63 Decimal 12.00 Binary 11.18 Decimal 10.00 Binary 9.31 Decimal 6.00 Binary 5.59 Decimal 2.10 Binary 1.96 Decimal 1.20 Binary 1.12

05-07-2002	#6 (permalink)
ckin2001 CDFreaks Resident Join Date: Jan 2002 Location: Strongbadia Posts: 3,408	hard drives are calculated using 1024k=1mb, but sold using 1000kb=1mb. cd's, 700mb=700mb=700*1024kb, more or less __________________ www.livingwithoutmicrosoft.org last 5 cd's Avril Lavigne - Whatever the new one is called Lucky Boys Confusion - Throwing the Game lostprophets - Start Something Story of the Year - Page Avenue Flaming Lips - Yoshimi Battles the Pink Robots Don't let schooling interfere with your education. -Mark Twain

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03-07-2002	#3 (permalink)
Chewbacca CD Freaks Rookie Join Date: Mar 2002 Posts: 32	CD space isn't decimal right?

04-07-2002	#5 (permalink)
Chewbacca CD Freaks Rookie Join Date: Mar 2002 Posts: 32	yes of course the FAT file system states 1024 is 1 kbyte but are 700mb cds caculated using 1000=1 kbyte or 1024=1 kbyte? I'm talking about how HDD's are calculated using =1000 but when you format it its really =1024

06-07-2002	#7 (permalink)
Fallen CD Freaks Senior Member Join Date: Feb 2002 Posts: 267	Then again, there ARE those CDs that are sold as "680MB/74Min" and "730MB/80 min", but still only fit the normal 650/700MB. THOSE have their "box" space calculated by 1MB = 1000k = 1.000.000 bytes.

06-07-2002	#8 (permalink)
FutureProof Senior Admin Join Date: Oct 2001 Location: True Blue Posts: 5,606	CD-R standards are minutes. Audio gets more minutes than data because of less EDC/ECC

06-07-2002	#9 (permalink)
philamber Legal Senior Admin Join Date: Jun 2002 Location: True Blue Posts: 6,804	According to Britannica, a standard cd (i.e. 650mb/74 min) actually holds 680mb which explains why you can always overburn them to some extent. The same doesn't hold true for 700mb/80 min cds however. Whilst some of them hold a little more than 700mb, it usually isn't much and some actually hold slightly less.

06-07-2002	#10 (permalink)
Fallen CD Freaks Senior Member Join Date: Feb 2002 Posts: 267	@FutureProof: You probably meant "More MB per minute", right? But even so, it would not equate to 680/74, more like 740/74. But yes, the standards really are the minutes, and the manufacturers print whatever they find better for them on space. @Philamber: Odd. Somehow I doubt it... Anyway, my best overburner is a 80' CD, my Princos, they hold an extra 04:52.60 without errors, amounting to 746MB.