/dev/mtdblock0 filesystem: Unknown or unsupported.

A partition and disk imaging/cloning program

Brought to you by: steven_shiau

/dev/mtdblock0 filesystem: Unknown or unsupported.

Forum: Open Discussion

Creator: hkfriends

Created: 2025-10-16

Updated: 6 days ago

hkfriends - 2025-10-16

HI all

I am testing latest

clonezilla-live-20251015-plucky-amd64.iso

and it come with new error on my SSD nvme
(mtdblock0) is not supported, I don't have this error on old build clonezilla-live-20250929-plucky-amd64. but recent release Oct come with this error

Machine: System Product Name
nvme2n1 (372.6G|INTEL_SSDPFR1Q400GBF|pci-0000_05_00_0-nvme-1|PHAK2211004S400AGN)
nvme2n1p1 (100M|vfat|In_INTEL_SSDPFR1Q400GBF|No_label|pci-0000_05_00_0-nvme-1|PHAK2211004S400AGN)
nvme2n1p2 (16M|No_file_system|In_INTEL_SSDPFR1Q400GBF|No_label|pci-0000_05_00_0-nvme-1|PHAK2211004S400AGN)
nvme2n1p3 (371.5G|ntfs|In_INTEL_SSDPFR1Q400GBF|Intel_P5801X|pci-0000_05_00_0-nvme-1|PHAK2211004S400AGN)
nvme2n1p4 (983.1M|ntfs|In_INTEL_SSDPFR1Q400GBF|Recovery|pci-0000_05_00_0-nvme-1|PHAK2211004S400AGN)
mtdblock0 (32M|No_file_system|In_No_disk_model|No_label|No_ID_path|No_serial_no)

********.
Finished saving /dev/nvme2n1p4 as /home/partimag/2025-10-16-19-img/nvme2n1p4.ntfs-ptcl-img.zst
*******.
Refusing to fsck unknown or unsupported file system on /dev/mtdblock0.
Starting saving /dev/mtdblock0 as /home/partimag/2025-10-16-19-img/mtdblock0.XXX...
/dev/mtdblock0 filesystem: Unknown or unsupported.
*******.
*******.
Use partclone with zstd to save the image.
Image file will not be split.
**********.
If this action fails or hangs, check:
* Is the disk full ?

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Steven Shiau - 2025-10-16

Thanks for your feedback.
So what's the full ocs-sr command you ran?
Please share the log file /var/log/clonezilla.log, too.
Thank you very much.

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- hkfriends - 2025-10-17
  
  Hello Steven
  
  pls see attached 2 files
  
  Info-saved-by-cmd.txt
  
  clonezilla-img
  
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Steven Shiau - 2025-10-17

Thanks for sharing that.
It looks like some of the MTD block device is not well supported by Linux kernel, and it might give some I/O errors. That causes Partclone, even in dd mode, failing to save the device as an image.
We have disabled saving MTD block device by default. It can be enabled in expert mode using "-smtd" in Clonezilla live >= 3.3.0-22 or 20251017-*:
https://clonezilla.org/downloads.php
Please give that a try and let us know the results.

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- hkfriends - 2025-10-17
  
  thanks a lot.. it works well again in this build :)
  
  👍
  1
  
  clonezilla-img
  
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Steven Shiau - 6 days ago

Great. Thanks for confirming that.

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