kernel backup on 7.0

["James López (BLuEGoD)"]

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Ivan Voras escribió:
| Jeremy Chadwick wrote:
|> On Thu, Mar 06, 2008 at 01:58:08PM +0100, Ivan Voras wrote:
|>> James López (BLuEGoD) wrote:
|>>
|>>> Not exactly.. What I mean is that I want to reinstall FreeBSD due to
|>>> some accidentally deleted files and a behavior on sendfile :S
|>>> So I would like to know if I can backup /boot and the overwrite it once
|>>> I have freebsd installed again...
|>> Yes. If you don't change FreeBSD versions or hardware, this will work.

In my case I have FreeBSD 7.0 and I will reinstall the same version :)

Thanks for all :)

|> Clarification: it _might_ work.
|>
|> You need to keep in mind that the kernel/modules he's backing up will
|> very likely *not* match all the binaries he has on his disks, library
|> calls, possibly system calls, etc. etc...  This is why building world
|> includes both all the binaries *as well* as the kernel.
|
| I agree, but I think this is covered by "not changing FreeBSD versions" :)
|
|> The reason I point this out is, when certain things in kernel-land
|> change which certain programs rely upon (but haven't been recompiled to
|> be aware of that change), odd things can happen.  The most "famous" of
|> the bunch is when top(1) or ps(1) start failing in bizarre ways.
|>
|> Thus, my point: it *probably* will work, but DO NOT assume that it will.
|
| To be even more precise, it will probably (with very high certainty)
| work for two FreeBSD versions x1.y1 and x2.y2 if x1 == x2 and y1 <= y2.
| It will probably also work for any combination of y1 and y2 as long as
| x1 == x2. It will probably fail if x1 != x2.
|


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