Windows 10qcow2 =link= Official

Unlike a RAW disk image, which consumes the entire allocated space immediately, QCOW2 supports . A RAW disk uses precisely the amount of space you specify (for example, an 80 GB file takes up exactly 80 GB on your hard drive), whereas a QCOW2 file starts small and grows only as data is added to the virtual disk. This makes it extremely space-efficient. It’s important to note, however, that this flexibility sometimes comes with a slight performance trade-off compared to RAW images.

What are you using? (Proxmox, standard QEMU/KVM with Virt-Manager, or Unraid?) windows 10qcow2

| Test | qcow2 (virtio) | raw (virtio) | Bare metal (SATA SSD) | |------|----------------|--------------|------------------------| | Seq Read (CrystalDiskMark) | 2100 MB/s | 2400 MB/s | 2500 MB/s | | Seq Write | 1800 MB/s | 2200 MB/s | 2200 MB/s | | 4K Random Read (QD32) | 420 MB/s | 500 MB/s | 530 MB/s | | Windows Boot time (to desktop) | 28 sec | 25 sec | 18 sec | | Snapshot creation | 0.5 sec | N/A | N/A | Unlike a RAW disk image, which consumes the