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<title>UDisks Reference Manual: The /org/freedesktop/UDisks2/block_devices/* objects</title>
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<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="ref-dbus-block-devices"></a>The /org/freedesktop/UDisks2/block_devices/* objects</h2></div></div></div>
<p>
Objects with object paths starting with
<code class="literal">/org/freedesktop/UDisks2/block_devices/</code>
all represent <a class="ulink" href="http://en.wikipedia.org/wiki/Block_device#Block_devices" target="_top">block devices</a>.
Such objects implement the
<a class="link" href="gdbus-org.freedesktop.UDisks2.Block.html#gdbus-interface-org-freedesktop-UDisks2-Block.top_of_page">org.freedesktop.UDisks2.Block</a>
D-Bus interface and may optionally implement other D-Bus interfaces such as
<a class="link" href="gdbus-org.freedesktop.UDisks2.Filesystem.html#gdbus-interface-org-freedesktop-UDisks2-Filesystem.top_of_page">org.freedesktop.UDisks2.Filesystem</a>,
<a class="link" href="gdbus-org.freedesktop.UDisks2.Partition.html#gdbus-interface-org-freedesktop-UDisks2-Partition.top_of_page">org.freedesktop.UDisks2.Partition</a> or
<a class="link" href="gdbus-org.freedesktop.UDisks2.Loop.html#gdbus-interface-org-freedesktop-UDisks2-Loop.top_of_page">org.freedesktop.UDisks2.Loop</a> depending on the block device in question.
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<p>
Note that interfaces may be added and removed at
run-time. For example, if a block device is full of zeroes
(or, at least, have zeroes in the known metadata areas), it
will not intially implement the <a class="link" href="gdbus-org.freedesktop.UDisks2.Filesystem.html#gdbus-interface-org-freedesktop-UDisks2-Filesystem.top_of_page">org.freedesktop.UDisks2.Filesystem</a>
interface; however, if a filesystem is later created on the device
(using, say, the
<span class="citerefentry"><span class="refentrytitle">mkfs</span>(8)</span>
command) and the filesystem is recognized by the OS (specifically, recognized by
<span class="citerefentry"><span class="refentrytitle">udev</span>(7)</span> and its device probers), the object will gain the interface. If the device is later zeroed or formatted for use as e.g. swap-space, it will lose the
<a class="link" href="gdbus-org.freedesktop.UDisks2.Filesystem.html#gdbus-interface-org-freedesktop-UDisks2-Filesystem.top_of_page">org.freedesktop.UDisks2.Filesystem</a>
interface.
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