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List:       freebsd-hackers
Subject:    Re: Panic not dumping to USB.
From:       Hans Petter Selasky <hps () selasky ! org>
Date:       2016-08-12 22:08:36
Message-ID: 47d14884-29dc-e5df-9d78-2c09e6c3dc0e () selasky ! org
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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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