Date: Sat, 13 Aug 2016 00:08:36 +0200 From: Hans Petter Selasky <hps@selasky.org> To: cem@freebsd.org, Zaphod Beeblebrox <zbeeble@gmail.com> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Panic not dumping to USB. Message-ID: <47d14884-29dc-e5df-9d78-2c09e6c3dc0e@selasky.org> In-Reply-To: <CAG6CVpXq=4viO5yVrnrcu2pZ0hGak05Tq2h3ABuxKGNyvOaL7A@mail.gmail.com> References: <CACpH0MeyEG1eG=ivndFFXnXNh2NocmG1xybqcFamr8McW_2UHQ@mail.gmail.com> <CAG6CVpXq=4viO5yVrnrcu2pZ0hGak05Tq2h3ABuxKGNyvOaL7A@mail.gmail.com>
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On 08/12/16 20:34, Conrad Meyer wrote: > Hi Zaphod, > > I don't think USB disks support polled I/O, which is needed for dump > devices. As far as I know only classic disk devices (ATA, SCSI) work. > USB supports polled mode for USB disks, but the disk must be attached prior to panic. --HPS
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