Date: Sat, 18 Dec 2021 16:51:34 -0800 From: bob prohaska <fbsd@www.zefox.net> To: MJ <mafsys1234@gmail.com> Cc: freebsd-arm@freebsd.org Subject: Re: Dealing with slow USB disks, was: Re: Saving environment variables in u-boot Message-ID: <20211219005134.GA12292@www.zefox.net> In-Reply-To: <6105a8a6-e760-2183-72fd-92e5a60aa8df@gmail.com> References: <20211216180704.GA4173@www.zefox.net> <214132DD-A095-4349-BB81-B79CB8CF6B0C@yahoo.com> <20211217013613.GA4452@www.zefox.net> <E2F6D50B-694A-4108-BD84-C85BC96AD832@yahoo.com> <20211218005946.GA7670@www.zefox.net> <5C44D0E6-2FF1-4EEB-B21A-83333D6FCF46@yahoo.com> <9D416106-660F-40BB-98D2-1354B53D2FEF@yahoo.com> <EC6CC83C-BC0A-4A12-866A-9FA24083FF7E@yahoo.com> <20211218223543.GA9484@www.zefox.net> <6105a8a6-e760-2183-72fd-92e5a60aa8df@gmail.com>
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On Sun, Dec 19, 2021 at 10:56:04AM +1100, MJ wrote: > > > > My suggestion: Have you tried directly connecting the USB into the RPI4? > I've had previous run-ins with RPI3B and powered hubs where it seems to be > very slow to enumerate the hub and therefore the devices attached. > The same disk and enclosure boot without issue on the Pi4, so I've little doubt it'd work. I tried removing the USB hub and plugging the disk straight into the Pi3, expecting it to fail on low voltage. To my surprise it warm-booted ok, but the disk still doesn't enumerate. Five tries at usb reset finally revealed the disk, run bootcmd_usb0 brought the disk and FreeBSD up without visible hiccups. The serial console output has been added to http://www.zefox.net/~fbsd/slow_usb_notes. Five usb resets _isn't_ an improvement, but at least it now seems the trouble isn't the hub. Thanks for the suggestion! bob prohaska
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