Unmount Mass Storage USB Device from the Command Line in Linux

Posted by Casey on Super User See other posts from Super User or by Casey
Published on 2010-06-03T11:07:20Z Indexed on 2010/06/03 11:14 UTC
Read the original article Hit count: 366

Filed under:

linux

|

scsi

|

sdparm

|

usb-mass-storage

|

unmount

I've searched high and low, and can't figure this one out. I have a older Olympus Camera (2001 or so). When I plug in the USB connection, I get the following log output:

$ dmesg | grep sd
[20047.625076] sd 21:0:0:0: Attached scsi generic sg7 type 0
[20047.627922] sd 21:0:0:0: [sdg] Attached SCSI removable disk

Secondly, the drive is not mounted in the FS, but when I run gphoto2 I get the following error:

$ gphoto2 --list-config

*** Error ***              
An error occurred in the io-library ('Could not lock the device'): Camera is already in use.
*** Error (-60: 'Could not lock the device') ***

What command will unmount the drive. For example in Nautilus, I can right click and select "Safely Remove Device". After doing that, the /dev/sg7 and /dev/sdg devices are removed.

Some things I've tried already are sdparm and sg3_utils, however I am unfamiliar with them, so it's possible I just didn't find the right command.

© Super User or respective owner

Related posts about linux

apt-get install and update fail

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I've got a problem with apt-get update and apt-get install ... commands . every time update or installing fails and errors are : Get:1 http://dl.google.com stable Release.gpg [198B] Ign http://dl.google.com/linux/chrome/deb/ stable/main Translation-en_US Get:2 http://dl… >>> More
kernel module compiling error

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
sh@ubuntu:/home/ccpp/helloworld$ make gcc-4.6 -O2 -DMODULE -D_KERNEL_ -W -Wall -Wstrict-prototypes -Wmissing-prototypes -isystem /lib/modules/`uname -r`/build/include -c -o hello-1.o hello-1.c hello-1.c:4:0: warning: "MODULE" redefined [enabled by default] <command-line>:0:0: note: this is… >>> More
Build-Essentials installation failing

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I am having trouble accessing the several critical header files that show to be a part of the build process. The "Ubuntu Software Center" shows "Build Essentials" as installed: Next I did the following two commands, which did not improve the problem: ~$ sudo apt-get install build-essential [sudo]… >>> More
Updating Debian kernel

as seen on Super User - Search for 'Super User'
I'm trying to update my Debian machine to 2.6.32-46 (which is the new stable). However, after doing apt-get update my apt-cache search linux-image shows me: linux-headers-2.6.32-5-486 - Header files for Linux 2.6.32-5-486 linux-headers-2.6.32-5-686-bigmem - Header files for Linux 2.6.32-5-686-bigmem linux-headers-2… >>> More
Serial connection over a single USB cable (Windows to linux, or linux to linux)

as seen on Server Fault - Search for 'Server Fault'
I'm helping out with a project for an embedded device that only has USB and no serial. This device is running Linux. These days, when we need to connect to a serial port on a device we typically use a USB to serial adapter (on something like a phone system or a load balancing device, etc). I would… >>> More

Related posts about scsi

RHEL 5 SCSI ADPATEC

as seen on Stack Overflow - Search for 'Stack Overflow'
HI I have RHEL 5 box . and adpatec scsi card connected to it . I can see the adaptor under dsmeg | grep -i scsi dmesg | grep -i scsi SCSI subsystem initialized scsi0 : SCSI emulation for USB Mass Storage devices Type: CD-ROM ANSI SCSI revision: 00 scsi 0:0:0:0:… >>> More
an old scanner (SCSI connectivity) problem with windows xp

as seen on Super User - Search for 'Super User'
i have an old scanner mirascan 640p that uses SCSI connectivity , it works only with windows 9x but doesn't work with xp and above , i found that xp not supporting SCSI by default so a tried "Advanced SCSI Programming Interface" (ASPI) http://www.adaptec.com/en-US/downloads/ but it doesn't… >>> More
Understanding Linux SCSI queue depths

as seen on Server Fault - Search for 'Server Fault'
I'm experimenting with the effects of different SCSI queue depth values on a Dell server running CentOS Linux 5.4 (x86_64). The server has two QLogic QLE2560 FC HBAs connected via multipathing to a storage system. The storage system has allocated two LUNs to the server, each connected through four… >>> More
Can I use a SCSI Ultra 320 drive instead of SAS

as seen on Super User - Search for 'Super User'
Hello, I have a bricked SCSI hard drive that I need to replace. It has a SAS interface Model ST373455SS Can I replace it with this one Model ST373455LC that has an Ultra320 interface? >>> More
Can't find created directory on zfs

as seen on Server Fault - Search for 'Server Fault'
I'm using openSUSE 13.1. I created a new directory on a zpool zfs create zpgd0/iSCSI -o compression=lz4 -o atime=off but I'm not looking on that... So I do it again but I'm getting... zfs create zpgd0/iSCSI -o compression=lz4 -o atime=off cannot create 'zpgd0/iSCSI': dataset already exists adding… >>> More