[Bug 2106499] Re: Installation fails with 'OSError: [Errno 16] Device or resource busy: '/dev/mmcblk1p3'' (target device contains the installer)

[Olivier Gayot]

Using the probe-data from bug 2107318:

$ jq '.blockdev[] | select(.DEVTYPE | test("disk")) | {DEVNAME, ID_SERIAL, MMC_TYPE}' probe-data.json
{
  "DEVNAME": "/dev/mmcblk0",
  "ID_SERIAL": "0xc64a48e1",
  "MMC_TYPE": "MMC"
}
{
  "DEVNAME": "/dev/mmcblk0boot0",
  "ID_SERIAL": "0xc64a48e1",
  "MMC_TYPE": "MMC"
}
{
  "DEVNAME": "/dev/mmcblk0boot1",
  "ID_SERIAL": "0xc64a48e1",
  "MMC_TYPE": "MMC"
}
{
  "DEVNAME": "/dev/mmcblk1",
  "ID_SERIAL": "0xd4034d01",
  "MMC_TYPE": "SD"
}

The presence of mmcblk0boot* entries might also be something to watch
out for.

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https://bugs.launchpad.net/bugs/2106499

Title:
  Installation fails with 'OSError: [Errno 16] Device or resource busy:
  '/dev/mmcblk1p3'' (target device contains the installer)

Status in subiquity package in Ubuntu:
  New

Bug description:
  I tried to install http://cdimage.ubuntu.com/ubuntu-server/daily-
  live/20250408/plucky-live-server-riscv64.iso on a StarFive VisionFive
  2 board with eMMC. Curtin failed with:

  File "/snap/subiquity/6584/lib/python3.12/site-packages/curtin/block/__init__.py", line 1120, in exclusive_open
              fd = os.open(path, flags)
                   ^^^^^^^^^^^^^^^^^^^^
          OSError: [Errno 16] Device or resource busy: '/dev/mmcblk1p3'

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