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Media size

4.7Gb DVD - Actual capacity: 4.377Gb

What is the

actual storage capacity of a dvd disc

A disc with a 25GB capacity is the equivalent of 23.28 gigabytes

Normally rated at 50GB, in practice they can record about 46.57GB of

data

What is the

maximum capacity of a blu ray disc

Generate ISO image from directory

genisoimage -U -R -allow-lowercase -allow-multidot -o mydvd.iso "$1"

Alternative is mkisofs

-U

Allows "untranslated" filenames, completely violating the ISO9660 standards described above. Enables the following flags: -d -l -N -allow-leading-dots -relaxed-filenames -allow-lowercase -allow-multidot -no-iso-translate. Allows more than one `.' character in the filename, as well as mixed-case filenames. This is useful on HP-UX, where the built-in cdfs filesystem does not recognize any extensions. Use with extreme caution.

-R

Generate SUSP and RR records using the Rock Ridge protocol to further describe the files on the ISO9660 filesystem.

[Wikipedia - ISO 9660](https://en.wikipedia.org/wiki/ISO_9660#SUSP "Wikipedia - ISO 9660")

Corrected command

genisoimage -R -o mydvd.iso "$1"

Burning data to a DVD or Blu-ray

Note:

Make sure that the medium is not mounted when you begin to write to

it. Mounting may happen automatically if the medium contains a readable

file system. In the best case, it will prevent the burn programs from

using the burner device. In the worst case, there will be misburns

because read operations disturbed the drive. So if in doubt, do:

umount /dev/sr0

growisofs has a small bug with blank BD-R media. It issues an error

message after the burning is complete. Programs like k3b then believe

the whole burn run failed. To prevent this, either format the blank BD-R

by dvd+rw-format /dev/sr0 before submitting it to growisofs or use

growisofs option

-use-the-force-luke=spare:none

Archwiki - Optical disk

burning

Burning an ISO image to

CD, DVD, or BD

To

burn a readily prepared ISO image file isoimage.iso onto an optical

medium, run for CD:

cdrecord -v -sao dev=/dev/sr0 isoimage.iso

and for DVD or BD:

growisofs -dvd-compat -Z /dev/sr0=isoimage.iso

for CD, DVD, BD:

xorriso -as cdrecord -v dev=/dev/sr0 -dao isoimage.iso

Other reading

Archwiki - Optical disk

drive

Archwiki - Optical disk

drive

Debian - Gensisoimage man

page

Debian - Gensisoimage man

page

Debian wiki -

genisoimage and xorrisofs

Debian wiki