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<think>
Alright, I need to classify the given bug report from QEMU into one of the provided categories: mistranslation, assembly, other, device, graphic, socket, network, KVM, boot, vnc, debug, files, permissions, performance, kernel, peripherals, hypervisor.
The bug report is about a qcow2 image becoming logically corrupt after a host crash. The user describes that the image appears as zeroes but still contains data. They mention that qemu-img check doesn't find any issues and converting to raw results in a zero-filled image, which they believe shouldn't happen because the storage backend didn't restart.
Looking at the categories:
- **mistranslation** relates to incorrect mapping from source to target architecture, which doesn't fit here.
- **assembly** is about assembly lowering; not relevant.
- **device**, **graphic**, **socket**, **network**, **KVM**, **boot**, **vnc**, **debug**, **files**, **permissions**, **performance**, **kernel**, **peripherals**, and **hypervisor** are other options.
The issue pertains to how QEMU handles qcow2 images during a crash. Since qcow2 is a disk image format, this falls under the broader category of file handling or storage issues. However, the categories provided don't include "storage" explicitly.
Looking at the list again, **files** might be the closest fit because it relates to how files are managed and stored. Alternatively, since the issue is about logical corruption in the image format after a crash, which could involve the hypervisor's handling of storage devices, perhaps **hypervisor** would be appropriate. But "hypervisor" typically refers more to the management of virtual machines rather than file systems.
Considering that the problem is with the qcow2 image and how QEMU handles it during a host crash, it's likely related to the way QEMU manages storage images as part of its hypervisor functions. Therefore, **hypervisor** might be the best fit.
But another angle is that this could be a bug in how files are written or checked, so **files** could also make sense. However, since qcow2 is a disk image format used by QEMU/KVM, which is part of the hypervisor's functionality, it's more about the hypervisor layer.
Wait, but the problem isn't directly about KVM but about the storage images managed by QEMU as part of KVM. So maybe **hypervisor** is appropriate because it's an issue within the virtualization layer.
Alternatively, perhaps **other** since none of the specific categories perfectly fit this scenario, but given that qcow2 relates to how disk images are handled in QEMU/KVM, which falls under hypervisor functions.
</think>
The bug report deals with the corruption of a qcow2 image after a host crash. The issue is related to how QEMU handles storage images as part of its hypervisor functionality. Therefore, the appropriate category is **hypervisor**.
hypervisor
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