I am trying to write a shell script to unmount/mount all external drive on OS X.
My disk list is as follows:
$ diskutil list
/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_CoreStorage 499.4 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
/dev/disk1
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD *496.3 GB disk1
Logical Volume on disk0s2
AE949253-803C-49DC-93EA-7DFC74C2EAA2
Unencrypted
/dev/disk2
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS Time Machine 999.9 GB disk2s2
/dev/disk3
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *750.2 GB disk3
1: EFI EFI 209.7 MB disk3s1
2: Microsoft Basic Data USB HD 4 749.9 GB disk3s2
/dev/disk4
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.1 GB disk4
1: EFI EFI 209.7 MB disk4s1
2: Microsoft Basic Data Backup 499.9 GB disk4s2
/dev/disk5
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk5
1: EFI EFI 209.7 MB disk5s1
2: Apple_HFS USB HD 1 999.9 GB disk5s2
/dev/disk6
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *4.0 TB disk6
1: EFI EFI 209.7 MB disk6s1
2: Apple_HFS USB HD 2 4.0 TB disk6s2
/dev/disk8
#: TYPE NAME SIZE IDENTIFIER
0: Apple_partition_scheme *122.9 GB disk8
1: Apple_partition_map 32.3 KB disk8s1
2: Apple_Driver43 28.7 KB disk8s2
3: Apple_Driver43 28.7 KB disk8s3
4: Apple_Driver_ATA 28.7 KB disk8s4
5: Apple_Driver_ATA 28.7 KB disk8s5
6: Apple_FWDriver 262.1 KB disk8s6
7: Apple_Driver_IOKit 262.1 KB disk8s7
8: Apple_Patches 262.1 KB disk8s8
9: Apple_HFS Windows 122.9 GB disk8s9
So, I write a script like:
#!/bin/sh
diskutil list | grep -oE 'disk[0-9]s2' | while read i
do
Prtl=`diskutil info ${i} | grep Protocol | cut -d ' ' -f 21`
if [ ${Prtl} = USB ]; then
diskutil unmount ${i}
fi
done
I'd like to know the followings:
1.Is there a way to identify external drive without using diskutil info? The reason is diskutil info starts up sleeping drive, my script is very slow.
2.Are there any much more smart way? I have Googled so much, but I can't find a way which I want. Hope to help me...
You could try using system_profiler with different data types. I don't think it wakes up the drives. system_profiler SPUSBDataType will give you all USB devices and their mount points, and system_profiler SPFireWireDataType does the same for FireWire devices. system_profiler -listDataTypes will give you all data types. Once you parse out the mount points, you can unmount those drives.
It's not perfectly portable across different systems to just do USB then FireWire then Thunderbolt because there could be different connections. To try everything, you could do system_profiler (which lists all data) then search for anything following "Mount Point:" and unmount whatever is after that.
This is an example of the data it prints out for a USB drive:
1394A/USB2.0/eSATA combo drive:
Product ID: 0x000a
Vendor ID: 0x0928 (Oxford Semiconductor Ltd.)
Version: 0.00
Serial Number: 2009100700000936
Speed: Up to 480 Mb/sec
Manufacturer: PI-208
Location ID: 0xfd500000 / 3
Current Available (mA): 500
Current Required (mA): 0
Capacity: 1 TB (1,000,204,886,016 bytes)
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk5
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Not Supported
Volumes:
disk5s1:
Capacity: 209.7 MB (209,715,200 bytes)
BSD Name: disk5s1
Content: EFI
Clone:
Capacity: 650.2 GB (650,200,002,560 bytes)
Available: 101.49 GB (101,489,717,248 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk5s2
Mount Point: /Volumes/Clone
Content: Apple_HFS
Volume UUID: F42D6E05-C72C-386A-86AD-635A818E1FE3
LocalBackup:
Capacity: 339.53 GB (339,526,688,768 bytes)
Available: 53.88 GB (53,881,970,688 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk5s3
Mount Point: /Volumes/LocalBackup
Content: Apple_HFS
Volume UUID: 04974080-CB76-3CC3-BC37-274241D1BC0F
Yosemite:
Capacity: 9.35 GB (9,350,000,640 bytes)
Available: 9.31 GB (9,311,920,128 bytes)
Writable: Yes
File System: Journaled HFS+
BSD Name: disk5s4
Mount Point: /Volumes/Yosemite
Content: Apple_HFS
Volume UUID: AE809679-3C2A-3BE4-950F-551663791CE3