A PetaByte is equivalent
to 1024 TeraBytes,
1,048,576 GigaBytes,
1,073,741,824 MegaBytes,
1,099,511,627,776 KiloBytes,
1,125,899,906,842,624 Bytes or 9,007,199,254,740,992 Bits
in
the basic form of digital information storage, being
composed of '0's or '1's in any combination.
On a CD or DVD the Bits are represented by 'pits' and 'grounds' (the normal flat
metallic surface of the disc without any holes burnt or punched out of it) with
a transition between a pit and ground being a 1 and a continuous spell within
a pit or a ground being a 0.
On a tape or hard
disc the same principle to a CD applies, but the
pits and grooves are represented magnetically.
As a rough guide,
you can fit 0.00002 PetaBytes (or 25 GigaBytes) on
a single-layer Blu-ray disc, 0.000048 PetaBytes
(or 50 GigaBytes) on a dual-layer Blu-ray disc, 0.000004
PetaBytes (or 4.7 GigaBytes) of information on a
full size (12cm) DVD and 0.0000005 PetaBytes (or
0.7 GigaBytes) of information on a standard (12cm)
CD.
There are 8 Bits
in a Byte,
1024 Bytes in a Kilobyte (KB),
1024 KiloBytes in a MegaByte (MB),
1024 MegaBytes in a GigaByte (GB),
1024 GigaBytes in a TeraByte (TB),
1024 TeraBytes in a PetaByte,
1024 PetaBytes in an ExaByte,
1024 ExaBytes in a ZettaByte and
1024 ZettaBytes in a YottaByte.
View other CD
and DVD production FAQs.
