What I meant to say was that a filesystem that requires a user-mode component can not be the boot filesystem.
I agree with you. The problem with the filesystem proposed in the recent mail is that it depends on a _secondary_ and tertiary usermode component - which itself requires the FS to be loaded already. Maybe it would be possible to have a monolithic usermode (DB) FS-driver booting the system if the loader boots like -> kernel + hal + usermode-FS.
However, the "DB filesystem" described so far would require: -> kernel + hal + Usermode[MySQL + Tcl + ... + FS].
How can you load MySQL and Tcl without the (whatever-mode) FS?
Consequence: it's not bootable! (okay, maybe coLinux could run there ;-)
Just my two cents,
Oliver