![]() ![]() This separation allows you to use any kind of drive “backing” (file, memory, iSCSI target, etc.) with any kind of guest-visible device (virtio-blk, virtualized SATA, etc.). The guest part (called the device) is the virtio-blk PCI device. For storage devices, the host part (called the drive) is properties like the image file, format, caching/AIO settings, etc. ![]() The QEMU monitor has changed quite a bit over the years, apparently! This article will explain how to hot-remove and hot-add virtio-blk drives using QEMU 3.1 (the version in Debian Buster).īefore we begin, keep in mind that QEMU separates the concept of devices into two halves: the host part, and the guest part. Many of the articles that cover hot-swapping disks on QEMU or QEMU-KVM either assume you’re using virt-manager/virtsh, cover USB disks and not virtio, or are for an old version of QEMU.
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