https://bugs.kde.org/show_bug.cgi?id=399885

--- Comment #6 from Stefan Brüns <stefan.bru...@rwth-aachen.de> ---
More importantly, external drives do not provide a stable ID. This is 2-part:

1. The device-id changes (may change) when a device is unmounted and later
mounted again. This is mostly an issue for external drives, e.g. USB. The
kernel uses the bus number to create the device id, so this typically works for
SATA drives (unless you change the port or add an additional controller).

2. The inode may change. For ext4, btrfs this is not an issue, but for network
mounts it is (the inode is stable as long as a drive stays mounted, but may be
different on next mount). NTFS optionally provides unique IDs for file objects,
but I am not sure how ntfs-3g creates the inode numbers.

For (1.), this can only be solved by having separate "namespaces" for each
drive/filesystem, and using some different method to identify the drive (LABEL,
UUID, ...). For the home partition, "same device as where the DB is stored"
suffices.

This is significantly more work than just changing some config parameters.

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