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The "FATAL ERROR: no CD-ROM found" error typically occurs when installing MikroTik RouterOS x86 from an ISO file on modern hardware or virtual machines that do not use legacy IDE interfaces. Direct Fixes for "No CD-ROM Found"

MikroTik is a popular brand of network equipment, including routers, switches, and wireless access points. During the installation or upgrade process, some MikroTik devices may encounter a "Fatal Error: No CD-ROM found" error. This error typically occurs when the device is unable to detect a CD-ROM drive, which is required for the installation or upgrade process.

Example: Using Netinstall (concise steps)

  1. Download Netinstall and RouterOS package for x86 from MikroTik.
  2. Set Windows host IP to 192.168.88.2/24, disable firewall.
  3. Run Netinstall, choose the RouterOS package and target interface.
  4. Boot target machine; press the key to start PXE/boot from network (or use special Netinstall boot floppy/ISO).
  5. Netinstall detects the machine and installs RouterOS over the network.

Understanding the Error: Why Does MikroTik Want a CD-ROM?

To fix a problem, you must first understand its origin. The "Fatal Error: No CD-ROM found" is a legacy artifact. The standard MikroTik NetInstall CD image (the .iso file) was designed in an era when IDE optical drives were universal.

The RouterOS installation process is generally straightforward, but encountering the "Fatal Error: No CD-ROM Found" message can bring your network deployment to a grinding halt. This error typically occurs when the MikroTik installer cannot communicate with the storage media or the installation ISO. Whether you are installing on a physical x86 machine, a vintage RouterBoard, or a virtualized environment, here is how to resolve the issue. Understanding the Root Cause

He dug through a dusty drawer and found a grey CD-ROM drive salvaged from a 1999 Compaq desktop. His hands shook as he jury-rigged the PATA cable to a power adapter, balancing the drive on top of the router like a hat on a coffin.

andreipop June 27, 2021, 7:50pm 14. It is actualy 16 years old. And seems like the isue was never solved. Semms like nobody cares. MikroTik community forum

  1. The user attempted Rufus DD mode – error persisted due to UEFI BIOS limitations.
  2. Switched to Netinstall using a second laptop.
  3. Connected the thin client via Ethernet to the laptop.
  4. Used Netinstall to push the full npk package bundle.
  5. Installation completed in 4 minutes. The thin client now runs as a full-featured router with wireless, BGP, and Docker support.

: Remove existing CD-ROM and Hard Disk entries from SATA controllers and re-add them under an IDE Controller