chmod -R 777 usb-storage Errors

Ehartwig · 09-06-2004, 10:39 PM

I am using RedHat 9.0 and Have successfully mounted my USB thumb drive. I am now unable to add or remove files from the drive.

I have tried:

Code:

chmod -R 777 /mnt/usb-storage/

(as root)

but it gives me the error:

Code:

chmod: changing permissions of `usb-storage/' (requested: 0777, actual: 0755): Operation not permitted

Then it goes to list the same error for the files on the device.

Am I doing something wrong or how can i solve this problem?

quatsch · 09-06-2004, 10:44 PM

the filesystem on that thing probably doesn't support permissions. You have to specify the permission at mounttime. If you are mounting it manually, try something like

mount -o umask=0 /dev/usb /mnt/usb

(of course, change the dev and mount point to suit your needs)

stevie_velvet · 09-08-2004, 11:45 AM

in terms of write-protect or write-enable on USB ~ a numebr of drives support physical switches whcih should be used

Ehartwig · 09-08-2004, 03:55 PM

I am unable to run that code, it says device is already mounted. When I try to unmount the usb it says device is busy. How can I go about fixing this?

quatsch · 09-08-2004, 08:47 PM

Make sure nothing is reading data from the drive. Also, it says device busy if you are somewhere in the filesystem of the drive, e.g. you are in a terminal window and your current directory is on the drive.

You can also try
mount -o remount, umask=0 /dev/usb /dev/usb-storage

Ehartwig · 09-09-2004, 05:27 PM

It seems to work now, somewhat. When copy a file to it, kde displays and error saying

Code:

Could not change permissions for:

The file still shows up on the usb device even though I recieve that error and the file is still on the usb drive when i plug it into another computer. It works, I'm just now woundering how i can fix the error message.

Tinkster · 09-09-2004, 05:37 PM

You can't - the filesystem is most likely FAT of
some sort, and knows nothing about linux permissions
as quatsch already pointed out.

Cheers,
Tink