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<think>
Okay, so I need to classify this bug report in QEMU into one of the given categories. Let's look at the details provided.
The user reported that when using a raw disk (like \\.\PhysicalDrive1) on a Windows host, the Qemu guest fails to write files. They provided the command line and an analysis. The issue arises because FlushFileBuffers returns -EIO with GetLastError() as ERROR_INVALID_FUNCTION, suggesting it doesn't support raw devices.
Looking at the code snippet from block/raw-win32.c, lines 95-97 show that aio_worker calls FlushFileBuffers on a handle, which fails for raw disks. The user suggests ignoring this error since writes seem fine without flushing.
Possible categories are: mistranslation, assembly, other, device, graphic, socket, network, KVM, boot, vnc, debug, files, permissions, performance, kernel, peripherals, hypervisor.
The problem is related to file operations on a raw disk. The issue occurs when attempting to flush buffers, which isn't supported for raw devices, leading to write failures. This seems to be an issue with how QEMU handles I/O operations on raw disks, specifically the flushing mechanism.
"Files" category makes sense here because it's about file I/O and handling of disk writes. Alternatively, "device" could also apply since it's related to a storage device, but "files" is more specific to the operation being performed.
</think>
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