I have a ton of recovered partitions, almost all have completely shed the front core.
Thats ezactly what the partition is supposed to do.
Then I want no part of them. I want a bullet to leave... Like someone said of ladies of ill-repute, "I don't pay them for sex, I pay them to leave!"
The vent is important to my way of thinking and in my experience; and confirmed by doc friends in reference to making stuff die fast. Might not be needed every time, but often enough to make it mandatory feature...
art