From: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
To: Lei Yang <lya755@ece.northwestern.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: loopback on block device
Date: Thu, 28 Oct 2004 01:31:29 +0100 [thread overview]
Message-ID: <20041028003129.GL24336@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <417FE922.7080009@ece.northwestern.edu>
On Wed, Oct 27, 2004 at 01:29:54PM -0500, Lei Yang wrote:
> >Here is a question for loopback device. As far as I understand, the
> >loopback device is used to mount files as if they were block devices.
> >
> >Then Why I could do "losetup -e XOR /dev/loop0 /dev/ram0" ? Notice
> >that ram0 is not mounted anywhere and does not have a filesystem on
> >it. I've tried that command and there seems to be no error. I got
> >confused and looked into loop.c, it seems to me that a loopback device
> >should be associated with a "backing file", why would it work on a
> >block device anyway?
Because block device is a file.
next prev parent reply other threads:[~2004-10-28 0:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-27 18:20 loopback on block device Lei Yang
2004-10-27 18:29 ` Lei Yang
2004-10-28 0:31 ` Al Viro [this message]
2004-10-27 18:58 ` linux-os
2004-10-27 19:42 ` Lei Yang
2004-10-28 9:48 ` Helge Hafting
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