subject: Dvd Recordable [print this page] DVD write-once formats DVD write-once formats
DVD-R
DVD+R
DVD rewritable formats
DVD-RW
DVD+RW
DVD-RAM
Speed
Drive speed
Data rate
Disc write time
Equivalent CD rate
Reading speed
1
11.08 Mbit/s
1.32 MB/s
53 min
9
818
2
22.16 Mbit/s
2.64 MB/s
27 min
18
2024
4
44.32 Mbit/s
5.28 MB/s
14 min
36
2432
5
55.40 Mbit/s
6.60 MB/s
11 min
45
2432
6
66.48 Mbit/s
7.93 MB/s
9 min
54
2432
8
88.64 Mbit/s
10.57 MB/s
7 min
72
3240
10
110.80 Mbit/s
13.21 MB/s
6 min
90
3240
16
177.28 Mbit/s
21.13 MB/s
4 min
144
3240
18
199.44 Mbit/s
23.76 MB/s
3 min
162
3240
20
221.60 Mbit/s
26.40 MB/s
2 min
180x
3240
24
265.92 Mbit/s
31.68 MB/s
2 min
216x
3248
Notes:
DVD 1 actual spin is 3 times that of CD 1
Disk write time in table does not include overhead, leadout, etc.
Capacities
Most DVDR/RWs are advertised as having a capacity of 4.7 GB. However these DVDs seem to hold less than the stated 4.7GB because many manufacturers quote the capacity of a DVD using decimal prefixes instead of the binary prefixes used by some software. This can be confusing for many users. While a 4.7 GB DVD can store 4.7 billion bytes: 4,700,000,000 bytes 1000 B/kB = 4,700,000 kB 1000 kB/MB = 4,700 MB 1000 MB/GB = 4.7 GB, using binary prefixes the same capacity is roughly 4.38 GiB: 4,700,000,000 bytes 1024 B/KiB = 4,589,844 KiB 1024 KiB/MiB = 4,482.27 MiB 1024 MiB/GiB = 4.38 GiB.
Mini DVDs sold for use with camcorders generally have a capacity of approximately 1.7GB.
DVDR DL discs are advertised as holding 8.5 GB.
The Actual Storage Capacity for DVDs are:
DVD-R = 4.36GiB - 4.38GiB
DVD-RW = 4.36GiB - 4.38GiB
DVD+R = 4.36GiB - 4.37GiB
DVD+RW = 4.36GiB - 4.37GiB
DVD-RAM = 4.26GiB - 4.27GiB
As you can see, DVD-RAM offers less space (varies from 100mb to 120mb)
Longevity
See also: Optical_disc_recording_technologies#Longevity
According to a study published in 2008 by the Preservation Research and Testing Division of the U.S. Library of Congress, most recordable CD products have a higher probability of greater longevity compared to recordable DVD products.
References
^ osta.org
^ CD-R and DVD-R RW Longevity Research
Categories: DVDHidden categories: All articles with unsourced statements | Articles with unsourced statements from October 2007
