From:    Steve Litt <slitt@???>

Date:    Sat, 29 Nov 2025 21:58:28 -0500

> ... Ext4 or btrfs etc is good enough for me.
> ...
> Let's say your boot drive is a single partition on an NVMe. You
> install your OS on that, as THE single partition.

Good tutorial. Thanks! Stored in the SteveLitt file here.

(1) Often the orginal system is on /dev/sda. For blunder avoidance,
will translate "/dev/sda" to "/dev/sd<somethingElse>" before messing
with commands.

(2)
> The real beauty is when you add a few other directories, which
> used to be mountpoints. Instead of you having to guess how much
> they'll hold, you can just symlink them to corresponding directories
> under /bindmounts, and you'll have former mountpoints that are now
> completely expandable and shrinkable.

Good.

Suppose you add another device, /dev/sdb. You can't have a directory
spanning /dev/sda and /dev/sdb. Correct?

All I know about overlayfs is from Wikipedia.
https://en.wikipedia.org/wiki/OverlayFS
Reaches a result similar to yours? Allows a directory to span
multiple devices? Another gadget to try when there's time to spare.
=8~/

> ... thoroughly test it out on a VM guest before doing it for real.

Certainly. Probably on a test machine where I can wreck havok.

Thx!                                  ... P.

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