# All About ISO's

## Create ISO from DVD

Get the info of the cd/dvd you're copying.

```shell
isoinfo -d -i /dev/sr0 | grep -i -E 'block size|volume size'
```

Sample Output:

```shell
Logical block size is: 2048
Volume size is: 2264834
```

We use the Logical block size for the `bs=` variable and Volume size for the COUNT=

use DD to copy the DVD to an iso:

```shell
dd if=/dev/sr0 of=/mnt/incoming/test.iso bs=2048 count=2264834
```

Sample Output:

```shell
2264834+0 records in
2264834+0 records out
4638380032 bytes (4.6 GB, 4.3 GiB) copied, 373.405 s, 12.4 MB/s
```

### Test the image against the actual DVD

Get checksum of DVD and newly created image

Image

```shell
md5sum /mnt/incoming/test.iso
```

Sample Output:

```shell
d3a2cdd58b8c9ade05786526a4a8eae2 /mnt/incoming/test.iso
```

DVD

```shell
md5sum /dev/sr0
```

Sample Output:

```shell
d3a2cdd58b8c9ade05786526a4a8eae2 /dev/sr0
```

## Create ISO from files/directories

Examples

```shell
mkisofs -J -l -R -V "eBooks" -iso-level 4 -o /tmp/eBooks.iso ~/ownCloud/calibre-library/

mkisofs -allow-lowercase -R -V "eBooks" -iso-level 4 -o /tmp/eBooks.iso /mnt/calibre-library
```

## Mount ISO Image

```shell
mount -o loop -t iso9660 /tmp/CalibreLibrary2018.iso /tmp/OldLibrary
```