31
10
I'm on Mac OS X, have a DVD in the DVD-drive and can look at it in the Finder. I'd like to try to create an iso of it by using the dd command. But to do that I need to know what device to use as an input. How can I find what device my DVD-drive is?
Svish
Posted 2010-02-28T11:19:27.727
Reputation: 27 731
35
Put a disk into the drive, wait until OS X mounts it, and then type the following command in the Terminal:
$ mount
[⋮]
/dev/disk2 on /Volumes/MyDisk (cd9660, local, nodev, nosuid, read-only, noowners)
In my case, the drive is located at /dev/disk2.
You can use drutil as well.
# drutil status
Vendor Product Rev
MATSHITA DVD-R UJ-857D KBVB
Type: DVD+RW Name: /dev/disk2
[⋮]
viam0Zah
Posted 2010-02-28T11:19:27.727
Reputation: 1 909
9
Finally found a way. Not sure if it is the best, but it works anyways:
df -h
c",)
Svish
Posted 2010-02-28T11:19:27.727
Reputation: 27 731
It's also a working solution, since df displaying the free disk space on mounted file systems showing their device name as well. – viam0Zah – 2010-02-28T14:03:31.117
Yeah, that's what I suddenly discovered. My first thinking was that I could try to match it up with the size, but then discovered that it stood right there which was which :p – Svish – 2010-02-28T15:10:14.487
3
Start Utilites, Disk Util. Click the drive or partition on the left, then the blue i/info icon in the toolbar. The disk identifier is the name to be used after /dev/
Nicholaz
Posted 2010-02-28T11:19:27.727
Reputation: 1 479
For me, the disk identifier is the volume label (MyDisk), which is the same as the mount point under /mnt, and not the device name under /dev, which is /dev/disk2. – viam0Zah – 2010-02-28T14:01:25.847
+1 because it solved my problem, which was trying to eject a DVD I'd unmounted. – David Moles – 2012-07-03T14:15:50.150
this is the best answer because in my case I can't mount my device. – Felipe – 2013-02-18T21:50:20.340
2
Just embodied the diskutil incantation and awk in a script to recite CD device names:
May be handy for future reuse; I'm about to use it in my CD ripping kit.
Code:
#!/bin/sh
#
# Scan the output of diskutil and report the CD devices.
# - Cameron Simpson <cs@zip.com.au> 31mar2016
#
set -ue
diskutil list \
| awk '/^\// { device=$1 }
$1 == "0:" && $2 == "CD_partition_scheme" { print device }
'
Source code: https://bitbucket.org/cameron_simpson/css/src/tip/bin/osx-cd-device
Cameron Simpson
Posted 2010-02-28T11:19:27.727
Reputation: 21
1
You can find the path of a disk using a built-in tool on macOS.
DUAL BOOT in my case.
The path will be /dev/disk2s1, based on the value of that row.
haykam
Posted 2010-02-28T11:19:27.727
Reputation: 115
Device is listed on the first window, no need to press Info – Matt Sephton – 2018-10-11T13:51:10.037
1
thankfully, OS X has several options. in System Profiler, choose Serial-ATA, then in the device tree frame choose your device. it shows up as BSD Name.
df is fine but it displays with the partition (volume mounted as) info, rather than the device itself. e.g. a drive shows up as /dev/disk0s2 where the device itself is disk0; s2 is the volume mounted on / ..for most applications this is usable
diskutil list displays all devices and partitions
Moda
Posted 2010-02-28T11:19:27.727
Reputation: 126
0
You can check for devices which have no free space on them (will be the case with burned CDs / DVDs):
df -h | grep Volumes | grep "100%" | rev | cut -d '/' -f1 | rev
adam
Posted 2010-02-28T11:19:27.727
Reputation: 1
what are the chances for me to find you here! :D – Zhe Li – 2015-06-21T19:41:48.383