I am trying to use pyparted to automatically format and mount a MicroSD card when it is inserted into an embedded linux system. I basically copied the make_one_primary_partition.py example script, but it does not seem to detect the size of my MicroSD card correctly. Here is the output from my script:
DEBUG - created parted.Device instance --
model: path: /dev/mmcblk1 type: 5
sectorSize: 512 physicalSectorSize: 512
length: 2 openCount: 0 readOnly: False
externalMode: False dirty: False bootDirty: False
host: 127 did: 0 busy: False
hardwareGeometry: (0, 4, 32) biosGeometry: (0, 4, 32)
PedDevice: <_ped.Device object at 0x7f93dfedc0>
DEBUG - created parted.Disk instance --
type: msdos primaryPartitionCount: 0
lastPartitionNumber: -1 maxPrimaryPartitionCount: 4
partitions: []
device: <parted.device.Device object at 0x7f93dbd520>
PedDisk: <_ped.Disk object at 0x7f93dc2980>
DEBUG - created parted.Geometry instance --
start: 0 end: 1 length: 2
device: <parted.device.Device object at 0x7f93dbd700> PedGeometry: <_ped.Geometry object at 0x7f93dbd490>
DEBUG - created parted.FileSystem instance --
type: fat32 geometry: <parted.geometry.Geometry object at 0x7f93dbd6a0> checked: False
PedFileSystem: <_ped.FileSystem object at 0x7f93dc29c0>
DEBUG - created parted.Partition instance --
disk: <parted.disk.Disk object at 0x7f93dbd3a0> fileSystem: <parted.filesystem.FileSystem object at 0x7f93dbd790>
number: -1 path: /dev/mmcblk1p-1 type: 0
name: None active: True busy: False
geometry: <parted.geometry.Geometry object at 0x7f93dbd6a0> PedPartition: <_ped.Partition object at 0x7f93dd76d0>
Traceback (most recent call last):
File "/usr/bin/sdcard-formatter", line 11, in <module>
load_entry_point('disk-formatter==1.0', 'console_scripts', 'sdcard-formatter')()
File "/usr/lib/python3.8/site-packages/disk_formatter/sdcard_formatter.py", line 88, in main
mount_sdcard(args.devnode)
File "/usr/lib/python3.8/site-packages/disk_formatter/sdcard_formatter.py", line 43, in mount_sdcard
if not disk.partition():
File "/usr/lib/python3.8/site-packages/disk_formatter/disk_formatter.py", line 106, in partition
disk.addPartition(
File "/usr/lib/python3.8/site-packages/parted/decorators.py", line 42, in new
ret = fn(*args, **kwds)
File "/usr/lib/python3.8/site-packages/parted/disk.py", line 244, in addPartition
result = self.__disk.add_partition(partition.getPedPartition(),
_ped.PartitionException: Unable to satisfy all constraints on the partition.
The code for the function that is failing:
def partition(self):
"""
Create a partition table on the block device.
"""
self.logger.info("creating primary partition")
device = parted.getDevice(self.path)
self.logger.debug("created %s", device)
if self.filesystem is Filesystem.EXT4:
disk = parted.freshDisk(device, "gpt")
elif self.filesystem is Filesystem.FAT32:
disk = parted.freshDisk(device, "msdos")
self.logger.debug("created %s", disk)
disk.commit()
geometry = disk.getFreeSpaceRegions()[-1]
self.logger.debug("created %s", geometry)
filesystem = parted.FileSystem(
type=self.filesystem.name.lower(), geometry=geometry
)
self.logger.debug("created %s", filesystem)
partition = parted.Partition(
disk=disk, type=parted.PARTITION_NORMAL, fs=filesystem, geometry=geometry
)
self.logger.debug("created %s", partition)
disk.addPartition(
partition=partition, constraint=device.optimalAlignedConstraint
)
disk.commit()
if not self._wait_for_partition():
return False
# create filesystem
try:
subprocess.run(
f"mkfs.{self.filesystem.name.lower()} {self.partition_path}".split(),
check=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
encoding="UTF-8",
)
self.logger.debug(
"Created %s fs on %s", self.filesystem.name.lower(), self.partition_path
)
return True
except subprocess.CalledProcessError as error:
self.logger.error(
"mkfs.%s failed: %s", self.filesystem.name.lower(), error.stderr
)
return False
I am using PyParted commit 481510c10866851844b19f3d2ffcdaa37efc0cf8 (3.11.3) and parted 3.3.
I am trying to use pyparted to automatically format and mount a MicroSD card when it is inserted into an embedded linux system. I basically copied the
make_one_primary_partition.py
example script, but it does not seem to detect the size of my MicroSD card correctly. Here is the output from my script:The code for the function that is failing:
I am using PyParted commit
481510c10866851844b19f3d2ffcdaa37efc0cf8
(3.11.3) and parted 3.3.