So i have an mp3 player that i can only get working through a 256 mb card, altough it bugs frequently. I was wondering if there is any tool to set all the bits to 0 on the card, because right now it says its 61% full when i empty it (probably didnt erase a directory or it got damaged or something) and i would like to try to fix that. Is there any other way to get this working? like a mkfs.vfat tool or something like that? I think the wipe (setting all bits to 0) would probably also solve this. Really getting sick of this music player. Thanks.

If you install 'dosfstools', you'll have mkfs.vfat at your hands. Setting all bits to zero would make the device unusable until re-partitioning and reformatting.

K, thanks for the dosfstools. Isn't there a way to set only the data bits to 0? Like where the files go and that stuff (sorry bout my non-technical FS talk, but havent really worked with them in detail yet). And even if there is one that makes me have to re-partition and re-format, what is the app? Thanks.

Well, reformatting is the mkfs.vfat included in dosfstools. It's probably your best bet. Or you could simply try 'rm -rf /mnt/MOUNTPOINTFORMP3PLAYER', with the proper mountpoint, of course.

ill play around with that, ill probably end up borking it soo bad ill have to redo the FS at a school windows computer again, really want to get a good mp3 player.

just use 'mkfs.vfat /dev/sda1' or the appropriate device.