Sony DVD Burner Shows 4.7 GB media as 4.4 GB

[Thor]

Hello Friends.
I hv Win Xp +Sp2 , AMD 64 bit 3000+, Asrock MoBo , 512 MB DDR 400 Mhz from Zion, 2 x 80 GB HDD from Seagate.
And My DVD Writer Model is : SONY DVD RW DW-Q30A

Its working fine except that all media which has written 4.7 GB above it is shown having a capacity of 4489 MB (I use NERO 6 OEM Edition). Why So ? I'm unable to burn these DVDs upto atleast of 4700 MB ( . Quite a loss from me.
Can u figure this out for me.?

[chota_rod_waala]

4.7GB means 4490 MB

[drvarunmehta]

It's perfectly normal. It happens because the makers of optical media consider 1 GB = 1000x1000x1000 bytes instead of 1 GB = 1024x1024x1024 bytes.
Same reason your 80 GB hard disk only has 74 GB of usable space.

[JGuru]

That's right. you won't be able write data to its full capacity. You may even try
over-burning. The harddisk manufacturers use different maths formula!!
4.7 GB = 4490 MB.

[chota_rod_waala]

Originally Posted by JGuru

That's right. you won't be able write data to its full capacity. You may even try
over-burning. The harddisk manufacturers use different maths formula!!
4.7 GB = 4490 MB.

hey dude don copy mine

i dont know whether itz 4490mb or not.i guessed.

tanxx..