Fmtsysrom Access

# Erase mtd partition (e.g., firmware region)
flash_erase /dev/mtd2 0 0
What it is

When it’s used

Typical effects

Common invocations

Precautions

If device won’t boot after fmtsysrom

Notes

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| Error | Likely Cause | Fix |
|-------|--------------|-----|
| Device busy | System is using PROM | Boot from another medium (install CD) |
| Checksum mismatch after -w | Bad image or failed write | Re-verify image, try again |
| Permission denied | Not root | sudo or su - |
| Invalid image size | Wrong file for this hardware | Obtain correct PROM version | fmtsysrom
dd if=firmware.squashfs of=/dev/mtdblock2 bs=64k