[PATCH 3/5] Add support for whole-disk formatting.

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Whole-disk formats are recognized but cannot be edited in any way.
---
 booty/bootloaderInfo.py        |    6 ++-
 iw/bootloader_main_gui.py      |   10 ++-
 iw/partition_dialog_gui.py     |    6 +-
 iw/partition_gui.py            |  119 ++++++++++++++++++++-------------------
 iw/partition_ui_helpers_gui.py |    2 +-
 iw/raid_dialog_gui.py          |    4 +-
 storage/__init__.py            |   26 ++++++++-
 storage/devices.py             |   69 ++++++++++-------------
 storage/devicetree.py          |   49 +++++++++-------
 storage/partitioning.py        |   10 ++--
 textw/partition_text.py        |    2 +-
 11 files changed, 166 insertions(+), 137 deletions(-)

diff --git a/booty/bootloaderInfo.py b/booty/bootloaderInfo.py
index deddb4d..1878393 100644
--- a/booty/bootloaderInfo.py
+++ b/booty/bootloaderInfo.py
@@ -475,7 +475,11 @@ class bootloaderInfo(object):
         f.write("\n")
 
     def updateDriveList(self, sortedList=[]):
-        self._drivelist = map(lambda x: x.name, self.storage.disks)
+        # bootloader is unusual in that we only want to look at disks that
+        # have disklabels -- no partitioned md or unpartitioned disks
+        disks = self.storage.disks
+        partitioned = self.storage.partitioned
+        self._drivelist = [d.name for d in disks if d in partitioned]
         self._drivelist.sort(isys.compareDrives)
 
         # If we're given a sort order, make sure the drives listed in it
diff --git a/iw/bootloader_main_gui.py b/iw/bootloader_main_gui.py
index 213083a..5f2fec5 100644
--- a/iw/bootloader_main_gui.py
+++ b/iw/bootloader_main_gui.py
@@ -136,7 +136,10 @@ class MainBootloaderWindow(InstallWindow):
             lbl = dxml.get_widget("bd%dLabel" %(i,))
             combo.show()
             lbl.show()
-            m = __genStore(combo, anaconda.id.storage.disks, self.driveorder[i - 1])
+            partitioned = anaconda.id.storage.partitioned
+            disks = anaconda.id.storage.disks
+            bl_disks = [d.name for d in disks if d in partitioned]
+            m = __genStore(combo, bl_disks, self.driveorder[i - 1])
 
         dxml.get_widget("bd1Combo").connect("changed", __driveChange, dxml, choices)
         __driveChange(dxml.get_widget("bd1Combo"), dxml, choices)
@@ -190,10 +193,11 @@ class MainBootloaderWindow(InstallWindow):
         self.bl = anaconda.id.bootloader
         self.intf = anaconda.intf
 
-        disks = anaconda.id.storage.disks
         self.driveorder = self.bl.drivelist
         if len(self.driveorder) == 0:
-            self.driveorder = [d.name for d in disks]
+            partitioned = anaconda.id.storage.partitioned
+            disks = anaconda.id.storage.disks
+            self.driveorder = [d.name for d in disks if d in partitioned]
 
         if self.bl.getPassword():
             self.usePass = 1
diff --git a/iw/partition_dialog_gui.py b/iw/partition_dialog_gui.py
index c9781e0..7f76c86 100644
--- a/iw/partition_dialog_gui.py
+++ b/iw/partition_dialog_gui.py
@@ -164,14 +164,14 @@ class PartitionEditor:
 
                     iter = model.iter_next(iter)
 
-                if len(allowdrives) == len(self.storage.disks):
+                if len(allowdrives) == len(self.storage.partitioned):
                     allowdrives = None
 
                 size = self.sizespin.get_value_as_int()
                 disks = []
                 if allowdrives:
                     for drive in allowdrives:
-                        for disk in self.storage.disks:
+                        for disk in self.storage.partitioned:
                             if disk.name == drive:
                                 disks.append(disk)
 
@@ -403,7 +403,7 @@ class PartitionEditor:
             maintable.attach(lbl, 0, 1, row, row + 1)
 
             req_disk_names = [d.name for d in self.origrequest.req_disks]
-            self.driveview = createAllowedDrivesList(self.storage.disks,
+            self.driveview = createAllowedDrivesList(self.storage.partitioned,
                                                      req_disk_names,
                                                      disallowDrives=[self.anaconda.updateSrc])
             lbl.set_mnemonic_widget(self.driveview)
diff --git a/iw/partition_gui.py b/iw/partition_gui.py
index 04c9988..a17fd70 100644
--- a/iw/partition_gui.py
+++ b/iw/partition_gui.py
@@ -1017,62 +1017,66 @@ class PartitionWindow(InstallWindow):
             parent = self.tree.append(drvparent)
 
             self.tree[parent]['PyObject'] = disk
-            part = disk.format.firstPartition
-            extendedParent = None
-            while part:
-                if part.type & parted.PARTITION_METADATA:
-                    part = part.nextPartition()
-                    continue
-
-                partName = devicePathToName(part.getDeviceNodeName())
-                device = self.storage.devicetree.getDeviceByName(partName)
-                if not device and not part.type & parted.PARTITION_FREESPACE:
-                    log.debug("can't find partition %s in device"
-                                       " tree" % partName)
-
-                # ignore the tiny < 1 MB free space partitions (#119479)
-                if part.getSize(unit="MB") <= 1.0 and \
-                   part.type & parted.PARTITION_FREESPACE:
-                    if not part.active or not device.bootable:
+            if disk.partitioned:
+                part = disk.format.firstPartition
+                extendedParent = None
+                while part:
+                    if part.type & parted.PARTITION_METADATA:
                         part = part.nextPartition()
                         continue
 
-                if device and device.isExtended:
-                    if extendedParent:
-                        raise RuntimeError, ("can't handle more than "
-                                             "one extended partition per disk")
-                    extendedParent = self.tree.append(parent)
-                    iter = extendedParent
-                elif device and device.isLogical:
-                    if not extendedParent:
-                        raise RuntimeError, ("crossed logical partition "
-                                             "before extended")
-                    iter = self.tree.append(extendedParent)
-                else:
-                    iter = self.tree.append(parent)
-
-                if device and not device.isExtended:
-                    self.addDevice(device, iter)
-                else:
-                    # either extended or freespace
-                    if part.type & parted.PARTITION_FREESPACE:
-                        devstring = _("Free")
-                        ptype = ""
+                    partName = devicePathToName(part.getDeviceNodeName())
+                    device = self.storage.devicetree.getDeviceByName(partName)
+                    if not device and not part.type & parted.PARTITION_FREESPACE:
+                        log.debug("can't find partition %s in device"
+                                           " tree" % partName)
+
+                    # ignore the tiny < 1 MB free space partitions (#119479)
+                    if part.getSize(unit="MB") <= 1.0 and \
+                       part.type & parted.PARTITION_FREESPACE:
+                        if not part.active or not device.bootable:
+                            part = part.nextPartition()
+                            continue
+
+                    if device and device.isExtended:
+                        if extendedParent:
+                            raise RuntimeError, ("can't handle more than "
+                                                 "one extended partition per disk")
+                        extendedParent = self.tree.append(parent)
+                        iter = extendedParent
+                    elif device and device.isLogical:
+                        if not extendedParent:
+                            raise RuntimeError, ("crossed logical partition "
+                                                 "before extended")
+                        iter = self.tree.append(extendedParent)
                     else:
-                        devstring = device.name
-                        ptype = _("Extended")
-
-                    self.tree[iter]['Device'] = devstring
-                    self.tree[iter]['Type'] = ptype
-                    size = part.getSize(unit="MB")
-                    if size < 1.0:
-                        sizestr = "< 1"
+                        iter = self.tree.append(parent)
+
+                    if device and not device.isExtended:
+                        self.addDevice(device, iter)
                     else:
-                        sizestr = "%Ld" % (size)
-                    self.tree[iter]['Size (MB)'] = sizestr
-                    self.tree[iter]['PyObject'] = device
+                        # either extended or freespace
+                        if part.type & parted.PARTITION_FREESPACE:
+                            devstring = _("Free")
+                            ptype = ""
+                        else:
+                            devstring = device.name
+                            ptype = _("Extended")
+
+                        self.tree[iter]['Device'] = devstring
+                        self.tree[iter]['Type'] = ptype
+                        size = part.getSize(unit="MB")
+                        if size < 1.0:
+                            sizestr = "< 1"
+                        else:
+                            sizestr = "%Ld" % (size)
+                        self.tree[iter]['Size (MB)'] = sizestr
+                        self.tree[iter]['PyObject'] = device
 
-                part = part.nextPartition()
+                    part = part.nextPartition()
+            else:
+                # whole-disk formatting
+                self.addDevice(disk, parent)
 
             # Insert a '\n' when device string is too long.  Usually when it
             # contains '/dev/mapper'.  First column should be around 20 chars.
@@ -1116,7 +1120,7 @@ class PartitionWindow(InstallWindow):
 
             # Display a create dialog.
             stripe_dev = disp_stripe.obj
-            if isinstance(stripe_dev, storage.DiskDevice):
+            if stripe_dev.partitioned:
                 tempformat = self.storage.defaultFSType
                 device = self.storage.newPartition(fmt_type=tempformat, size=200)
                 self.editPartition(device, isNew = True)
@@ -1145,7 +1149,7 @@ class PartitionWindow(InstallWindow):
             # FIXME: This code might repeat itself.  might be a good idea to
             # put it in a function.
             curr_parent = self.tree[iparent]["PyObject"]
-            if isinstance(curr_parent, storage.DiskDevice):
+            if curr_parent.partitioned:
                 tempformat = self.storage.defaultFSType
                 device = self.storage.newPartition(fmt_type=tempformat, size=200)
                 self.editPartition(device, isNew = True)
@@ -1187,7 +1191,7 @@ class PartitionWindow(InstallWindow):
         if not device:
             # This is free space.
             parent = self.tree[iparent]["PyObject"]
-            if isinstance(parent, storage.DiskDevice):
+            if parent.partitioned:
                 if not isinstance(self.stripeGraph, DiskStripeGraph):
                     self.stripeGraph.shutDown()
                     self.stripeGraph = DiskStripeGraph(self.storage,
@@ -1203,7 +1207,7 @@ class PartitionWindow(InstallWindow):
                             dcCB = self.barviewActivateCB)
                 self.stripeGraph.setDisplayed(parent)
 
-        elif isinstance(device, storage.DiskDevice):
+        elif device.partitioned:
             if not isinstance(self.stripeGraph, DiskStripeGraph):
                 self.stripeGraph.shutDown()
                 self.stripeGraph = DiskStripeGraph(self.storage,
@@ -1273,7 +1277,7 @@ class PartitionWindow(InstallWindow):
             devices. This will need some work when that time comes.
         """
         device = self.tree.getCurrentDevice()
-        if device.format.type == "disklabel":
+        if device.partitioned:
             if doClearPartitionedDevice(self.intf,
                                         self.storage,
                                         device):
@@ -1281,8 +1285,7 @@ class PartitionWindow(InstallWindow):
         elif doDeleteDevice(self.intf,
                             self.storage,
                             device):
-            if isinstance(device, storage.devices.DiskDevice) or \
-               isinstance(device, storage.devices.PartitionDevice):
+            if isinstance(device, storage.devices.PartitionDevice):
                 justRedraw = False
             else:
                 justRedraw = True
@@ -1327,7 +1330,7 @@ class PartitionWindow(InstallWindow):
 
         # FIXME: Why do I need availraidparts to clone?
         activate_create_raid_clone = False
-        if (len(self.storage.disks) > 1
+        if (len(self.storage.partitioned) > 1
                 and availraidparts > 0):
             activate_create_raid_clone = True
 
diff --git a/iw/partition_ui_helpers_gui.py b/iw/partition_ui_helpers_gui.py
index 39b2561..ee6d0ac 100644
--- a/iw/partition_ui_helpers_gui.py
+++ b/iw/partition_ui_helpers_gui.py
@@ -420,7 +420,7 @@ def createPreExistFSOptionSection(origrequest, maintable, row, mountCombo,
 # do tests we just want in UI for now, not kickstart
 def doUIRAIDLVMChecks(request, storage):
     fstype = request.format.name
-    numdrives = len(storage.disks)
+    numdrives = len(storage.partitioned)
     
 ##     if fstype and fstype.getName() == "physical volume (LVM)":
 ## 	if request.grow:
diff --git a/iw/raid_dialog_gui.py b/iw/raid_dialog_gui.py
index 8431e71..086c562 100644
--- a/iw/raid_dialog_gui.py
+++ b/iw/raid_dialog_gui.py
@@ -812,7 +812,7 @@ class RaidCloneDialog:
         lbl = gtk.Label(_("Source Drive:"))
         lbl.set_alignment(0.0, 0.0)
         box.pack_start(lbl, padding=5)
-        (sw, self.sourceView) = self.createDriveList(storage.disks)
+        (sw, self.sourceView) = self.createDriveList(storage.partitioned)
         selection = self.sourceView.get_selection()
         selection.set_mode(gtk.SELECTION_SINGLE)
         box.pack_start(sw, padding=5)
@@ -820,7 +820,7 @@ class RaidCloneDialog:
         lbl = gtk.Label(_("Target Drive(s):"))
         lbl.set_alignment(0.0, 0.0)
         box.pack_start(lbl, padding=5)
-        (sw, self.targetView) = self.createDriveList(storage.disks)
+        (sw, self.targetView) = self.createDriveList(storage.partitioned)
         selection = self.targetView.get_selection()
         selection.set_mode(gtk.SELECTION_MULTIPLE)
         box.pack_start(sw, padding=5)
diff --git a/storage/__init__.py b/storage/__init__.py
index ea89633..05478f5 100644
--- a/storage/__init__.py
+++ b/storage/__init__.py
@@ -386,7 +386,7 @@ class Storage(object):
         """
         disks = []
         for device in self.devicetree.devices:
-            if isinstance(device, DiskDevice):
+            if device.isDisk:
                 if not device.mediaPresent:
                     log.info("Skipping disk: %s: No media present" % device.name)
                     continue
@@ -395,6 +395,30 @@ class Storage(object):
         return disks
 
     @property
+    def partitioned(self):
+        """ A list of the partitioned devices in the device tree.
+
+            Ignored devices are not included, nor disks with no media present.
+
+            This is based on the current state of the device tree and
+            does not necessarily reflect the actual on-disk state of the
+            system's disks.
+        """
+        partitioned = []
+        for device in self.devicetree.devices:
+            if not device.partitioned:
+                continue
+
+            if not device.mediaPresent:
+                log.info("Skipping device: %s: No media present" % device.name)
+                continue
+
+            partitioned.append(device)
+
+        partitioned.sort(key=lambda d: d.name)
+        return partitioned
+
+    @property
     def partitions(self):
         """ A list of the partitions in the device tree.
 
diff --git a/storage/devices.py b/storage/devices.py
index b4a518e..3d10ebc 100644
--- a/storage/devices.py
+++ b/storage/devices.py
@@ -418,6 +418,8 @@ class StorageDevice(Device):
     _devDir = "/dev"
     sysfsBlockDir = "class/block"
     _resizable = False
+    partitionable = False
+    isDisk = False
 
     def __init__(self, device, format=None,
                  size=None, major=None, minor=None,
@@ -710,9 +712,15 @@ class StorageDevice(Device):
                 os.access(remfile, os.R_OK) and
                 open(remfile).readline().strip() == "1")
 
+    @property
+    def partitioned(self):
+        return self.format.type == "disklabel"
+
 class DiskDevice(StorageDevice):
     """ A disk """
     _type = "disk"
+    partitionable = True
+    isDisk = True
 
     def __init__(self, device, format=None,
                  size=None, major=None, minor=None, sysfsPath='', \
@@ -2195,12 +2203,9 @@ class LVMLogicalVolumeDevice(DMDevice):
 
 
 class MDRaidArrayDevice(StorageDevice):
-    """ An mdraid (Linux RAID) device.
-
-        Since this is derived from StorageDevice, not DiskDevice, it
-        can NOT be used to represent a partitionable device.
-    """
+    """ An mdraid (Linux RAID) device. """
     _type = "mdarray"
+    partitionable = True
 
     def __init__(self, name, level=None, major=None, minor=None, size=None,
                  memberDevices=None, totalDevices=None, bitmap=False,
@@ -2643,29 +2648,28 @@ class MDRaidArrayDevice(StorageDevice):
         # real work, but it isn't our place to do it from here.
         self.exists = False
 
-
-class PartitionableMDRaidArrayDevice(MDRaidArrayDevice, DiskDevice):
-    """ A partitionable mdraid (Linux RAID) device.
-
-        Since this is derived from DiskDevice, not StorageDevice, it
-        can be used to represent a partitionable device.
-    """
-    _type = "partitionable mdarray"
-
     @property
     def mediaPresent(self):
-        # Even if stopped/deactivated we still want to show up in storage.disks
-        return True
+        present = None
+        if self.partitioned:
+            # Even if stopped/deactivated we still want to show up in
+            # storage.disks
+            present = True
+        else:
+            present = self.partedDevice is not None
+
+        return present
 
     @property
     def model(self):
         return "RAID%d Array" % self.level
 
-class DMRaidArrayDevice(DiskDevice):
+class DMRaidArrayDevice(DMDevice):
     """ A dmraid (device-mapper RAID) device """
     _type = "dm-raid array"
     _packages = ["dmraid"]
-    _devDir = "/dev/mapper"
+    partitionable = True
+    isDisk = True
 
     def __init__(self, name, raidSet=None, format=None,
                  size=None, major=None, minor=None, parents=None,
@@ -2777,11 +2781,12 @@ def generateMultipathDeviceName():
     number = _multipathDeviceNameGenerator.get()
     return "mpath%s" % (number, )
 
-class MultipathDevice(DiskDevice):
+class MultipathDevice(DMDevice):
     """ A multipath device """
     _type = "dm-multipath"
     _packages = ["device-mapper-multipath"]
-    _devDir = "/dev/mapper"
+    partitionable = True
+    isDisk = True
 
     def __init__(self, name, info, format=None, size=None,
                  parents=None, sysfsPath=''):
@@ -2881,26 +2886,6 @@ class MultipathDevice(DiskDevice):
         self._isUp = False
         self._pyBlockMultiPath = None
 
-    def updateSysfsPath(self):
-        """ Update this device's sysfs path. """
-        log_method_call(self, self.name, status=self.status)
-        if not self.exists:
-            raise DeviceError("device has not been created", self.name)
-
-        if self.status:
-            dm_node = self.getDMNode()
-            path = os.path.join("/sys", self.sysfsBlockDir, dm_node)
-            self.sysfsPath = os.path.realpath(path)[4:]
-        else:
-            self.sysfsPath = ''
-
-    def getDMNode(self):
-        """ Return the dm-X (eg: dm-0) device node for this device. """
-        log_method_call(self, self.name, status=self.status)
-        if not self.exists:
-            raise DeviceError("device has not been created", self.name)
-
-        return dm.dm_node_from_name(self.name)
 
 class NoDevice(StorageDevice):
     """ A nodev device for nodev filesystems like tmpfs. """
@@ -3089,6 +3074,8 @@ class iScsiDiskDevice(DiskDevice, NetworkStorageDevice):
     """ An iSCSI disk. """
     _type = "iscsi"
     _packages = ["iscsi-initiator-utils", "dracut-network"]
+    partitionable = True
+    isDisk = True
 
     def __init__(self, device, **kwargs):
         self.node = kwargs.pop("node")
@@ -3121,6 +3108,8 @@ class FcoeDiskDevice(DiskDevice, NetworkStorageDevice):
     """ An FCoE disk. """
     _type = "fcoe"
     _packages = ["fcoe-utils", "dracut-network"]
+    partitionable = True
+    isDisk = True
 
     def __init__(self, device, **kwargs):
         self.nic = kwargs.pop("nic")
diff --git a/storage/devicetree.py b/storage/devicetree.py
index b528ab2..23a8e57 100644
--- a/storage/devicetree.py
+++ b/storage/devicetree.py
@@ -567,10 +567,10 @@ class DeviceTree(object):
                     else:
                         ret = cmp(a2.device.name, a1.device.name)
                 elif isinstance(a1.device, PartitionDevice) and \
-                     not isinstance(a2.device, DiskDevice):
+                     a2.device.partitioned:
                     ret = 1
                 elif isinstance(a2.device, PartitionDevice) and \
-                     not isinstance(a1.device, DiskDevice):
+                     a1.device.partitioned:
                     ret = -1
                 else:
                     ret = 0
@@ -610,13 +610,13 @@ class DeviceTree(object):
                      isinstance(a2.device, PartitionDevice):
                     ret = cmp(a1.device.name, a2.device.name)
                 elif isinstance(a1.device, PartitionDevice) and \
-                     not isinstance(a2.device, DiskDevice):
+                     a2.device.partitioned:
                     if a1.isGrow():
                         ret = -1
                     else:
                         ret = 1
                 elif isinstance(a2.device, PartitionDevice) and \
-                     not isinstance(a1.device, DiskDevice):
+                     a1.device.partitioned:
                     if a2.isGrow():
                         ret = 1
                     else:
@@ -650,10 +650,10 @@ class DeviceTree(object):
                     else:
                         ret = cmp(a1.device.name, a2.device.name)
                 elif isinstance(a1.device, PartitionDevice) and \
-                     not isinstance(a2.device, DiskDevice):
+                     a2.device.partitioned:
                     ret = -1
                 elif isinstance(a2.device, PartitionDevice) and \
-                     not isinstance(a1.device, DiskDevice):
+                     a1.device.partitioned:
                     ret = 1
                 else:
                     ret = 0
@@ -681,7 +681,7 @@ class DeviceTree(object):
 
         log.debug("resetting parted disks...")
         for device in self.devices:
-            if device.format.type == "disklabel":
+            if device.partitioned:
                 device.format.resetPartedDisk()
 
         # reget parted.Partition for remaining preexisting devices
@@ -1184,7 +1184,7 @@ class DeviceTree(object):
             kwargs["identifier"] = udev_device_get_fcoe_identifier(info)
             log.debug("%s is an fcoe disk" % name)
         elif udev_device_get_md_container(info):
-            diskType = PartitionableMDRaidArrayDevice
+            diskType = MDRaidArrayDevice
             parentName = devicePathToName(udev_device_get_md_container(info))
             kwargs["parents"] = [ self.getDeviceByName(parentName) ]
             kwargs["level"]  = udev_device_get_md_level(info)
@@ -1250,7 +1250,7 @@ class DeviceTree(object):
         # The first step is to either look up or create the device
         #
         if udev_device_is_multipath_member(info):
-            device = StorageDevice(name,
+            device = DiskDevice(name,
                             major=udev_device_get_major(info),
                             minor=udev_device_get_minor(info),
                             sysfsPath=sysfs_path, exists=True,
@@ -1282,14 +1282,9 @@ class DeviceTree(object):
             if device is None:
                 device = self.addUdevOpticalDevice(info)
         elif udev_device_is_biosraid(info) and udev_device_is_disk(info):
-            # This is special handling to avoid the "unrecognized disklabel"
-            # code since biosraid member disks won't have a disklabel. We
-            # use a StorageDevice because DiskDevices need disklabels.
-            # Quite lame, but it doesn't matter much since we won't use
-            # the StorageDevice instances for anything.
             log.debug("%s is part of a biosraid" % name)
             if device is None:
-                device = StorageDevice(name,
+                device = DiskDevice(name,
                                 major=udev_device_get_major(info),
                                 minor=udev_device_get_minor(info),
                                 sysfsPath=sysfs_path, exists=True)
@@ -1311,23 +1306,28 @@ class DeviceTree(object):
         if device and device.name in self.protectedDevNames:
             device.protected = True
 
-        # Don't try to do format handling on drives without media
-        if device and not device.mediaPresent:
+        # Don't try to do format handling on drives without media or
+        # if we didn't end up with a device somehow.
+        if not device or not device.mediaPresent:
             return
 
         # Now, if the device is a disk, see if there is a usable disklabel.
         # If not, see if the user would like to create one.
-        # XXX this is the bit that forces disklabels on disks. Lame.
-        if isinstance(device, DiskDevice):
+        if device.partitionable:
             self.handleUdevDiskLabelFormat(info, device)
-            return
+            if device.partitioned or self.isIgnored(info):
+                # If the device has a disklabel, or the user chose not to
+                # create one, we are finished with this device. Otherwise
+                # it must have some non-disklabel formatting, in which case
+                # we fall through to handle that.
+                return
 
         # now handle the device's formatting
         self.handleUdevDeviceFormat(info, device)
 
     def handleUdevDiskLabelFormat(self, info, device):
         log_method_call(self, device=device.name)
-        if device.format.type == "disklabel":
+        if device.partitioned:
             # this device is already set up
             log.debug("disklabel format on %s already set up" % device.name)
             return
@@ -1371,6 +1371,11 @@ class DeviceTree(object):
                                device=device.path,
                                exists=not initlabel)
         except InvalidDiskLabelError:
+            # if there is preexisting formatting on the device we will
+            # use it instead of ignoring the device
+            if not self.zeroMbr and \
+               getFormat(udev_device_get_format(info)).type is not None:
+                return
             # if we have a cb function use it. else we ignore the device.
             if initcb is not None and initcb():
                 format = getFormat("disklabel",
@@ -1767,7 +1772,7 @@ class DeviceTree(object):
 
         if shouldClear(device, self.clearPartType,
                        clearPartDisks=self.clearPartDisks):
-            # if this is a partition that will be cleared by clearpart,
+            # if this is a device that will be cleared by clearpart,
             # don't bother with format-specific processing
             return
 
diff --git a/storage/partitioning.py b/storage/partitioning.py
index a23efb3..1bb1567 100644
--- a/storage/partitioning.py
+++ b/storage/partitioning.py
@@ -43,7 +43,7 @@ def _createFreeSpacePartitions(anaconda):
     # get a list of disks that have at least one free space region of at
     # least 100MB
     disks = []
-    for disk in anaconda.id.storage.disks:
+    for disk in anaconda.id.storage.partitioned:
         if anaconda.id.storage.clearPartDisks and \
            (disk.name not in anaconda.id.storage.clearPartDisks):
             continue
@@ -169,7 +169,8 @@ def doAutoPartition(anaconda):
     log.debug("clearPartType: %s" % anaconda.id.storage.clearPartType)
     log.debug("clearPartDisks: %s" % anaconda.id.storage.clearPartDisks)
     log.debug("autoPartitionRequests: %s" % anaconda.id.storage.autoPartitionRequests)
-    log.debug("storage.disks: %s" % anaconda.id.storage.disks)
+    log.debug("storage.disks: %s" % [d.name for d in anaconda.id.storage.disks])
+    log.debug("storage.partitioned: %s" % [d.name for d in anaconda.id.storage.partitioned])
     log.debug("all names: %s" % [d.name for d in anaconda.id.storage.devices])
     if anaconda.dir == DISPATCH_BACK:
         anaconda.id.storage.reset()
@@ -363,9 +364,8 @@ def clearPartitions(storage):
     # now remove any empty extended partitions
     removeEmptyExtendedPartitions(storage)
 
-
 def removeEmptyExtendedPartitions(storage):
-    for disk in storage.disks:
+    for disk in storage.partitioned:
         log.debug("checking whether disk %s has an empty extended" % disk.name)
         extended = disk.format.extendedPartition
         logical_parts = disk.format.logicalPartitions
@@ -733,7 +733,7 @@ def doPartitioning(storage, exclusiveDisks=None):
 
     """
     anaconda = storage.anaconda
-    disks = storage.disks
+    disks = storage.partitioned
     if exclusiveDisks:
         disks = [d for d in disks if d.name in exclusiveDisks]
 
diff --git a/textw/partition_text.py b/textw/partition_text.py
index 81c1f05..a299b94 100644
--- a/textw/partition_text.py
+++ b/textw/partition_text.py
@@ -95,7 +95,7 @@ class PartitionTypeWindow:
             screen.pushHelpLine (_("<Space>,<+>,<-> selection   |   <F2> Add drive   |   <F12> next screen"))
 
             # restore the drive list each time
-            disks = anaconda.id.storage.disks
+            disks = anaconda.id.storage.partitioned
             cleardrives = anaconda.id.storage.clearPartDisks
 
             for disk in disks:
-- 
1.6.5.2

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