Date: Thu, 15 Jul 2010 08:22:11 -0700 From: James Armstrong <jamescarmstrong@gmail.com> To: Hans Petter Selasky <hselasky@c2i.net> Cc: freebsd-usb@freebsd.org Subject: Re: Unable to boot off USB Drive Message-ID: <AANLkTinzJFsl81yyXoN-5Gbrh9OdHiT2cuAsSWalvvqw@mail.gmail.com> In-Reply-To: <201007151717.00355.hselasky@c2i.net> References: <AANLkTimY9E6dlW0SWM6WM3OxvFnBJ2U85aRwAyecrQYU@mail.gmail.com> <201007151717.00355.hselasky@c2i.net>
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On Thu, Jul 15, 2010 at 08:17, Hans Petter Selasky <hselasky@c2i.net> wrote: > On Thursday 15 July 2010 15:49:37 James Armstrong wrote: > > We're trying to boot a machine off a USB drive, and it looks like we're > > getting a race condition. After going through post, we get the message > > "FAILED TO MOUNT ROOT" and we enter the mountroot command screen, but > > amidst that screen, we also get the post message identifying the disk, > > with the notation that it has a 40.00000MB transfer speed. > > > > At the mountroot prompt, entering "ufs:/dev/da0s1a" properly boots. > > > > It looks to me like the system is trying to mount root before the USB > > drivers finish identifying all the devices, including the disk from which > > we are booting. > > > > Have any of you seen this? Any suggestions on how we can correct this? > > (As an interim, we're going to move the boot to a SATA drive, but we want > > to use all the SATA ports for other purposes, so this means we're > > sacrificing a SATA device.) > > > > Try to set this tunable to 5000, for example. > > kern.cam.boot_delay: 0 > > > This was one of the first things we tried (set at 10000). No joy.
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