Use the Netinstall tool to push the RouterOS package to the machine. This allows you to install the "Full" version without needing a physical optical drive. Summary Checklist for a Successful Install
Use physdiskwrite.exe on a Windows machine to write the .img file directly to the drive 1.2.1.
Insert this hard drive/CF card into the final router hardware. Summary Checklist for Troubleshooting Primary Solution Change CD-ROM controller from SCSI/SATA to IDE . Physical PC Switch BIOS to Legacy/CSM Mode . Physical/Virtual Use Install Image (.img) + physdiskwrite instead of ISO. All Ensure the ISO/Image is not corrupted (verify MD5).
This occurs because the MikroTik installer (based on a minimal Linux environment) sometimes misidentifies the boot device or fails to properly mount the installation source. Instead of a generic “installation source not found” message, the legacy code reports the absence of a CD-ROM. fatal error no cd rom found mikrotik full
MikroTik provides , a tool that sends the RouterOS image via Ethernet (PXE-like). This also bypasses the CD-ROM error because it does not use optical media.
Panic began to set in as John realized the gravity of the situation. The office relied heavily on the internet for daily operations, and without it, they would be unable to function. The phone system, email, and even the coffee machine (which was connected to the network for maintenance purposes) would all be down.
Method 4: Fixing Virtual Environments (VMware, VirtualBox, Proxmox) Use the Netinstall tool to push the RouterOS
If you have a Compact Flash (CF) card or a small IDE/SATA hard drive, you can use a test machine to write the image directly.
: In hypervisors like VMware, VirtualBox, or Proxmox, using the wrong virtual storage controller type (like SCSI or SATA instead of IDE) prevents the installer from reading the ISO data.
The error typically occurs when the MikroTik RouterOS installer boots but cannot find the media it was launched from to continue the installation . This most often happens when using modern SATA CD-ROMs, USB CD-ROMs, or incorrectly formatted USB flash drives. Core Solutions Insert this hard drive/CF card into the final
Modern UEFI settings can prevent the installer from correctly identifying the boot media as a CD device.
Netinstall is the most reliable method for x86 installations and recovery: "FATAL ERROR: no CD-ROM found" during installation
It then tries to mount /dev/cdrom to /cdrom and look for the packages directory. If you have access to the boot console (e.g., via Ctrl+Alt+F2 during boot), you could manually create a symlink from your USB device to /dev/cdrom , but this is complex and not recommended.
Ensure your virtual CD-ROM drive is attached to an IDE Controller , not SATA or SCSI. RouterOS looks for /dev/hda or /dev/cdrom via IDE.