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Folders and Files mysteriously being removed? (clip+)

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gevaerts:

--- Quote from: spiderlance on June 03, 2011, 04:35:41 AM ---does this actually make a difference somehow?

--- End quote ---

Yes. It tends to cause exactly the sort of issues you're seeing.

spiderlance:

--- Quote from: gevaerts on June 03, 2011, 04:38:23 AM ---Yes. It tends to cause exactly the sort of issues you're seeing.

--- End quote ---
alright I'll do it this way and let you know how it goes.

bluebrother:

--- Quote from: spiderlance on June 03, 2011, 04:35:41 AM ---Nope, I just pull the plug when it's done copying. does this actually make a difference somehow?

--- End quote ---

Maybe a bit of explanation here:

The FAT filesystem has some part that are required to get changed frequently (mostly the FAT). Writing such changes to the disk every time will make writes slow, and similar is true for reading. Therefore all major OS cache those parts of the filesystem. Now if you simply unplug the player the OS has no way to write changes done to the cached parts back to the disk since that is gone. Messing up the FAT can cause serious problems. As a result it is really important to unmount a disk (and this does apply to all disks, and is also true -- to some differet degree -- for otherfilesystems). Windows has a "safels remove hardware" icon in the systray for a reason, OS X will also tell you to not do this and the desktop environments on Linux usually have something like that too.

If you already did it wrong the filesystem will contain errors, and you shoupd really check it before doing anything else.

spiderlance:
Okay, I've reformatted the card about 3 times, I've tried safely removing the device and the files I just copied are not the card (yet taking up space??).
Also another thing I noticed; the first copy I did worked fine, BUT, while rockbox showed all the music I copied, the OF only showed about half the files I copied. and it seems like it randomly picked which files to show. this was after a full format on the card and safely removing the device.


--- Quote from: bluebrother on June 03, 2011, 04:49:01 AM ---Maybe a bit of explanation here:

The FAT filesystem has some part that are required to get changed frequently (mostly the FAT). Writing such changes to the disk every time will make writes slow, and similar is true for reading. Therefore all major OS cache those parts of the filesystem. Now if you simply unplug the player the OS has no way to write changes done to the cached parts back to the disk since that is gone. Messing up the FAT can cause serious problems. As a result it is really important to unmount a disk (and this does apply to all disks, and is also true -- to some differet degree -- for otherfilesystems). Windows has a "safels remove hardware" icon in the systray for a reason, OS X will also tell you to not do this and the desktop environments on Linux usually have something like that too.

If you already did it wrong the filesystem will contain errors, and you shoupd really check it before doing anything else.

--- End quote ---

Thanks for clearing that up, would I be able to use NTFS on this card?

GodEater:

--- Quote from: spiderlance on June 03, 2011, 05:28:56 AM ---Thanks for clearing that up, would I be able to use NTFS on this card?

--- End quote ---

1) No you wouldn't - Rockbox doesn't read NTFS.

2) It wouldn't help - you should ALWAYS safely unmount a filesystem before you physically unplug it. Doesn't matter if it's NTFS / FAT / <insert other file system here>

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