tldr/pages/osx/dd.md
2016-01-08 09:38:59 +01:00

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# dd
> Convert and copy a file.
- Make a bootable usb drive from an isohybrid file (such like archlinux-xxx.iso):
`dd if={{file.iso}} of=/dev/{{usb_drive}}`
- Clone a drive to another drive with 4MB block and ignore error:
`dd if=/dev/{{source_drive}} of=/dev/{{dest_drive}} bs=4m conv=noerror`
- Generating a file of 100 random bytes by using kernel random driver:
`dd if=/dev/urandom of={{random_file}} bs=100 count=1`
- Benchmark the write performance of a disk:
`dd if=/dev/zero of={{file_1GB}} bs=1024 count=1000000`