Mitsubishi Nrvz800mcd Boot Disk Full -

Unlike a personal computer where you can simply delete old movies, the boot disk on an industrial CNC unit has specific usage patterns. The primary causes include:

Use vendor shell equivalents; these are typical Linux commands:

df -h
df -i
du -sh /var/* /tmp/* /recordings/*
lsof | grep deleted
truncate -s 0 /var/log/huge.log
rm -rf /tmp/*

Do not run commands unless you understand their effect. mitsubishi nrvz800mcd boot disk full

Operators often upload large CAD/CAM files (G-code) directly to the internal memory rather than running them from a USB or network drive. Forgotten, large programs remain on the boot disk indefinitely.

  • Check disk usage:
  • Identify large files/directories:
  • Check mounted filesystems:
  • Inspect running processes:
  • Examine log rotation and cron:
  • Check for corrupted filesystems:
  • Check for firmware-specific counters:

    • Assuming console/SSH access and Linux-like environment: Unlike a personal computer where you can simply

  • Remove or move old recordings:
  • Restart daemons: systemctl restart recorder.service (vendor-specific)
  • Reboot if necessary: reboot
  • Verify free space and resume normal operation.

    • Adjust steps to vendor CLI/GUI commands if system doesn't expose standard Linux shell.

    Hibernation can use 1–3 GB of space.

    Once in the maintenance menu:

    The Mitsubishi NRV-Z800MCD is a multichannel digital video recorder (DVR) / network video recorder (NVR) appliance used for IP/analog camera recording. A common operational issue is the system reporting or behaving as if the "boot disk" or system disk is full. This can cause failed boot, degraded performance, inability to write logs, failure to record, or inconsistent uptime. This write-up explains causes, diagnostics, short- and long-term remediation, prevention, and recommended maintenance procedures. Do not run commands unless you understand their effect