Ubuntu: Unable to stop TOSHIBA TransMemory


I have a USB,when I choose safety remove, occur this error message.How to solve the problem?

Unable to stop TOSHIBA TransMemory

Error detaching: helper exited with exit code 1: Detaching device /dev/sdb  USB device: /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2)  SYNCHRONIZE CACHE: synchronize cache(10):  Fixed format, current;  Sense key: Key=9   Additional sense: Logical unit not ready, cause not reportable    Info fld=0x0 [0]   FAILED: No such file or directory  (Continuing despite SYNCHRONIZE CACHE failure.)  STOP UNIT: start stop unit: transport: Host_status=0x07 [DID_ERROR]  Driver_status=0x00 [DRIVER_OK, SUGGEST_OK]  

FAILED: No such file or directory


Maybe you could try manually unmounting the usb drive from the terminal.


First you will need to know the mount point or the device. You have a few options but in your case I think the first will tell you what you need to know.

1.To see information about currently mounted systems, simply run:


2.To see a list of your USB devices (the vendor and device ID's), run:


3.To see all attached storage devices and their partitions, run:

sudo fdisk -l  


Unmounting is done through the "umount" command, which can be given a device or a mount point

sudo umount /dev/sdb1  


sudo umount /media/external  

Would both unmount the filesystem on /dev/sdb1 if it is mounted on /media/external.

Remember that a filesystem cannot be in use when it is unmounted, otherwise umount will give an error. If you know it is safe to unmount a filesystem you can use:

sudo umount -l /mountpoint  

To do a "lazy" unmount

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