Date: 12 Mar 2003 11:39:05 +0100 From: "G. van Dalum" <g.vandalum@student.utwente.nl> To: freebsd-stable@freebsd.org Subject: Re: USB storage devices and booting Message-ID: <1047465545.1615.34.camel@server> In-Reply-To: <200303101424.h2AEOFQp038066@whizzo.transsys.com> References: <200303101424.h2AEOFQp038066@whizzo.transsys.com>
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I tried to attach a usb storage device last week it did not work correctly and i searched the net for a solution as i am a bit of a newbee and i didn't want to ask stupid questions on this or other lists. As i read the discussion on usb devices i thought my problem my be relevant so here it is: when i attach a usb flash storage device to my computer before booting it gets detected all right and i can mount it but reading and writing doesn't work vm_fault: pager read error, pid 1000 (cp) i don't have any scsi devices attached to my system exept the umass device when i detach it and reattach it i get these messages umass0: BBB reset failed, TIMEOUT umass0: BBB bulk-in clear stall failed, TIMEOUT umass0: BBB bulk-out clear stall failed, TIMEOUT i have set sysctl kern.cam.da.no_6_byte=1 why is the usb device detected ok during boot and not after? Guus On Mon, 2003-03-10 at 15:24, Louis A. Mamakos wrote: > While testing a fix to a USB driver a little while ago, I ran into a > weird but explainable situation. Say, for example, you've got a FreeBSD > system with one or more SCSI disks, and with the root partition on > one of those disks. The loader passes along a hint as to which device > the kernel should mount as the root partition, and away we go. > > Now, boot your system with a USB storage device attached. It seems > to get bound as "da0" before the first SCSI drive has a chance to. > This results in surprising behavior when you boot and it can't mount > a root partition off the drive it thought it booted from. > > I suppose I could hardwire the SCSI drives in my kernel configuration, > but that doesn't seem like the right answer. I don't normally boot > with the USB storage thing plugged in, but it's possible that I might > leave one attached and then have the system reboot while it's unattended > and not come back. > > Is there a relative priority between the various drivers as they get > device names allocated from (presumably) the CAM subsystem? > > louie > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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