How to make boot wait a few seconds more for device response?

[Thomas Mueller]

> I also see ".timeout" checked when parsing input from somewhere. I can't
> tell where exactly it is coming from, though. But I can't see where it
> checks specifically for "vfs.mountroot.timeout".

> Am I misreading it? Or is it not present in 9.2-RELEASE?

> Sorry to be a pain on this, but I'm looking to avoid trouble with a
> machine I'm upgrading remotely. I want to be sure before I pull the
> trigger.

I found it on 9.2-STABLE, default 3 seconds, in src/sys/kern/mountroot.c

uname -a shows

FreeBSD amelia2 9.2-STABLE FreeBSD 9.2-STABLE #19 r256095M: Tue Oct  8 08:57:11 UTC 2013     root at amelia2:/usr/obj/usr/src/sys/SANDY  amd64

I used it on the USB 3.0 stick installation of FreeBSD 10-prerelease, and it mounted the root without further prompting.

Tom