Skip site navigation (1)Skip section navigation (2)
Date:      Fri, 3 Dec 2010 01:37:43 +0000 (UTC)
From:      Marcin Wisnicki <mwisnicki+freebsd@gmail.com>
To:        freebsd-usb@freebsd.org
Subject:   Re: External usb HDD disconnects, system gets messed up
Message-ID:  <id9hl7$mau$1@dough.gmane.org>
References:  <20101125025526.GA2772@mail> <201011250940.19677.hselasky@c2i.net> <20101126020159.GA2408@mail> <201011260817.47338.hselasky@c2i.net>

next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, 26 Nov 2010 08:17:47 +0100, Hans Petter Selasky wrote:
> 
> I think that the USB part of your USB disk has died or there has been a
> firmware crash. Other OS'es will perform a complete device reset in this
> situation and sometimes that help, but still that is hiding a problem
> about the device. We don't do that on FreeBSD, and that might be the
> reason it does not recover.

Then print a warning. A lot of self-powered 2.5 disks I've used had the 
same problem.

Also, would it be possible to somehow keep the kernel device if physical 
device reappears within few seconds (with i/o temporarily frozen) such 
that existing mount points keep working ?

> 
> Check that your disk has external power supply! Sometimes the power
> supplied on the USB port is not sufficient.

> 
> --HPS





Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?id9hl7$mau$1>