Thanks for your reply, I found the the following thing interesting on its own:

On 4/7/05, Nikita Danilov <[EMAIL PROTECTED]> wrote:
> Consider tools like LILO that want stable block numbers for certain
> files. In reiserfs (both v3 and v4) there is an ioctl that disables
> relocation for a given file. Besides, I do not think ->bmap() is useless
> even when block numbers are volatile, for one thing it allows user level
> to track how file is laid out (for example, to measure fragmentation).

I tried to google out what behaviour lilo requires filesystems to
exhibit without much success... is that information available
somnewhere I din't look? Is that simple enought to be explained here?

TIA

Martin
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