writeprotection for a usbstick

[flo89]

Hi - i am searching for a solution to declare a usb stick as "write protected" - like a cdrom device.
in the moment you are trying to mount - the kernel drops a msg: "volume is writeprotected - mounting read only."

any idea? i do not mean, that you can lock the stick with a switch on the case. It should be a digital/software solution.

yours sincerly,

flo89

edit:\
dmesg output: Here should be a "Write Protect is On"

[costel78]

I don't know if it fit your needs but what about use readonly (ro) option in fstab ?
Something like: /dev/[...] [mountpoint] auto ro 0 0
Of course, this restriction could be avoided using manual mount.
_________________
Sorry for my English. I'm still learning this language.

[flo89]

sure - this is possible.
put i plan to use the stick on different systems and it should be unwriteable everytime.

but thank you for your try

[disi]

I have actual seen sticks with a switch on it to turn on/off write protection.

Which operating systems? If it's all NIX-like you could put on another filesystem like ext2, then set the permissions to only root can write to it? (or ntfs, but that requires the ntfs driver in linux)
_________________
Gentoo on Uptime Project - Larry is a cow

[flo89]

it should protect the mbr too, so the filesystemrights are irrelevant.

is there no flag which i can set with a hex editor or sth. else?

[Jaglover]

I do remember there was a DOS virus which set my harddrive readonly once upon time. Have no clue how it did it, though.
_________________
My Gentoo installation notes.
Please learn how to denote units correctly!

[flo89]

hoho - let's run a 80er virus =)
ok ehm - it does not have to protect the mbr too - it's my fault, sorry.

it could be nice to be able to protect the parition with sth. like fdisk.