[Qemu-devel] [Bug 1767200] [NEW] Kernel Panic Unable to mount root fs on unknown-block(31, 3)

[Qemu-devel] [Bug 1767200] [NEW] Kernel Panic Unable to mount root fs on unknown-block(31, 3)

[nada]

Public bug reported:

Using the latest qemu:
qemu-system-arm.exe -kernel C:\Users\a\Downloads\kernel-qemu-4.4.34-jessie -cpu arm1176 -m 256 -machine versatilepb -cdrom C:\Users\a\Downloads\picore-9.0.3.img

Gives error:
Kernel Panic Unable to mount root fs on unknown-block(31,3)

I have tried different ARMv6 ARMv7 images/kernels with the same result.

** Affects: qemu
     Importance: Undecided
         Status: New

** Attachment added: "VFS Kernel Panic Unable to mount root fs on unknown-block(31,3)"
   https://bugs.launchpad.net/bugs/1767200/+attachment/5127917/+files/Qemu-PANIC-VFS-31-3.JPG

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Title:
  Kernel Panic Unable to mount root fs on unknown-block(31,3)

Status in QEMU:
  New

Bug description:
  Using the latest qemu:
  qemu-system-arm.exe -kernel C:\Users\a\Downloads\kernel-qemu-4.4.34-jessie -cpu arm1176 -m 256 -machine versatilepb -cdrom C:\Users\a\Downloads\picore-9.0.3.img

  Gives error:
  Kernel Panic Unable to mount root fs on unknown-block(31,3)

  I have tried different ARMv6 ARMv7 images/kernels with the same
  result.

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[Qemu-devel] [Bug 1767200] Re: Kernel Panic Unable to mount root fs on unknown-block(31, 3)

[Thomas Huth]

Did it work with a previous version of QEMU? If yes, which version? And
since you're using -kernel ... don't you maybe have to use -initrd here,
too?

** Changed in: qemu
       Status: New => Incomplete

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Title:
  Kernel Panic Unable to mount root fs on unknown-block(31,3)

Status in QEMU:
  Incomplete

Bug description:
  Using the latest qemu:
  qemu-system-arm.exe -kernel C:\Users\a\Downloads\kernel-qemu-4.4.34-jessie -cpu arm1176 -m 256 -machine versatilepb -cdrom C:\Users\a\Downloads\picore-9.0.3.img

  Gives error:
  Kernel Panic Unable to mount root fs on unknown-block(31,3)

  I have tried different ARMv6 ARMv7 images/kernels with the same
  result.

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[Qemu-devel] [Bug 1767200] Re: Kernel Panic Unable to mount root fs on unknown-block(31, 3)

[Peter Maydell]

That's a guest error message, meaning it couldn't mount the root filesystem. This is almost certainly because you're not telling the guest kernel the right argument for where to find its rootfs (which you've provided with -cdrom). Googling suggests that you're getting this kernel from https://github.com/dhruvvyas90/qemu-rpi-kernel -- which has a readme file which tells you what command line options you need to use. Specifically:
 * you need to have 'root=/dev/sda2' in your -append argument
 * you want to use -hda rather than -cdrom

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Title:
  Kernel Panic Unable to mount root fs on unknown-block(31,3)

Status in QEMU:
  Incomplete

Bug description:
  Using the latest qemu:
  qemu-system-arm.exe -kernel C:\Users\a\Downloads\kernel-qemu-4.4.34-jessie -cpu arm1176 -m 256 -machine versatilepb -cdrom C:\Users\a\Downloads\picore-9.0.3.img

  Gives error:
  Kernel Panic Unable to mount root fs on unknown-block(31,3)

  I have tried different ARMv6 ARMv7 images/kernels with the same
  result.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1767200/+subscriptions

[Qemu-devel] [Bug 1767200] Re: Kernel Panic Unable to mount root fs on unknown-block(31, 3)

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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Title:
  Kernel Panic Unable to mount root fs on unknown-block(31,3)

Status in QEMU:
  Expired

Bug description:
  Using the latest qemu:
  qemu-system-arm.exe -kernel C:\Users\a\Downloads\kernel-qemu-4.4.34-jessie -cpu arm1176 -m 256 -machine versatilepb -cdrom C:\Users\a\Downloads\picore-9.0.3.img

  Gives error:
  Kernel Panic Unable to mount root fs on unknown-block(31,3)

  I have tried different ARMv6 ARMv7 images/kernels with the same
  result.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1767200/+subscriptions