Disk Images: ISO, VHD & DMG Containers
Filesystem snapshots and block-level virtual disk images.
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Format Comparison & Technical Specifications
| Output Format | MIME Type | Specification | Type |
|---|---|---|---|
| ISO 9660 Image | application/x-iso9660-image | ISO-9660-SPEC | Optical Disc Image |
| IMG Raw Disk | application/octet-stream | ISO-9660-SPEC | Raw Binary Sector Image |
| VMDK VMware Virtual Disk | application/x-vmdk | VMDK-SPEC | VMware Virtual Hard Disk |
| VHD Virtual Hard Disk | application/x-vhd | VHD-SPEC | Hyper-V Virtual Hard Disk |
| DMG Apple Disk Image | application/x-apple-diskimage | APPLE-DMG-SPEC | macOS Mountable Disk Image |
Technical Specifications & Codec Breakdown
What an ISO Image Actually Is
An ISO file is not an archive: it is an exact sector-by-sector copy of an optical disc filesystem (ISO 9660). Operating systems can mount an ISO directly as a virtual drive without needing a physical disc drive.
Converting Disk Images for Virtualization
Virtualization hypervisors often prefer specific virtual hard disk formats (like VHD for Hyper-V or RAW/QCOW2 for KVM). Converting disk containers ensures virtual machines boot smoothly across different virtualization platforms.
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