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@@ -517,7 +517,7 @@ class ThinVolume(qubes.storage.Volume):
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yield from qubes_lvm_coro(cmd, self.log)
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src_path = src_volume.export()
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cmd = ['dd', 'if=' + src_path, 'of=/dev/' + self._vid_import,
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- 'conv=sparse', 'status=none']
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+ 'conv=sparse', 'status=none', 'bs=128K']
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if not os.access('/dev/' + self._vid_import, os.W_OK) or \
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not os.access(src_path, os.R_OK):
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cmd.insert(0, 'sudo')
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