USB mount delay

[Lowell Gilbert]

Anselm Strauss <amsibamsi at gmail.com> writes:

> I have the problem that on my ALIX system USB is first powered up when
> the FreeBSD kernel is loading. When local filesystems are mounted the
> USB disk is not yet ready and booting fails giving me a shell prompt.
> Shortly after I see the kernel message for the recognized /dev/da0 USB
> disk, mount it manually and booting can continue. Unfortunately I have
> to do this manual step every time I boot. The root filesystem is not
> mounted from USB. The USB disk has non-system relevant data.
>
> Is there any way to either tell the kernel to wait some time before
> mounting local filesystems from USB disks, or to mount filesystems later
> during boot?
>
> I already tried the following sysctl variables in /boot/loader.conf with
> values of 3000-5000 ms, they did not help:
>
> kern.cam.scsi_delay: Delay to allow devices to settle after a SCSI bus
> reset (ms)
> hw.usb.ss_delay: USB status stage delay in ms
> hw.usb.pr_recovery_delay: USB port reset recovery delay in ms
>
> hw.usb.no_boot_wait is set to 0.

Why don't you just have devfs mount the disk when the disk does finally
show up?  It sounds like you don't actually need that USB disk for
booting.  You might need to use glabel to make sure only that one disk
is mounted automatically.

-- 
Lowell Gilbert, embedded/networking software engineer, Boston area
		http://be-well.ilk.org/~lowell/