src/windows/common/WslClient.cpp:1226

• The unconditional retry normalizes the disk argument via filesystem::GetFullPath(), which only works for real filesystem paths. If the user passes a non-filesystem disk identifier (e.g. passthrough paths like "\.\PHYSICALDRIVE…") and DetachDisk returns ERROR_FILE_NOT_FOUND, GetFullPath will throw (often ERROR_INVALID_NAME), changing the user-visible failure from ERROR_FILE_NOT_FOUND to a different error. Consider making normalization best-effort (catch/ignore GetFullPath failures and fall back to the original HRESULT), or gate the retry to VHD/filesystem-style paths only.

    // Retry with the normalized path to handle relative paths and \\?\ prefix mismatches.
    if (result == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND))
    {
        // retry dismounting with the absolute path
        const auto absoluteDisk = wsl::windows::common::filesystem::GetFullPath(filesystem::UnquotePath(disk).c_str());
        value = service.DetachDisk(absoluteDisk.c_str());

src/windows/common/WslClient.cpp:1226

• This retry normalizes the path via filesystem::GetFullPath(), which requires opening the path and will throw if the VHD path can’t be accessed (missing, ACL changed, etc.). Since this codepath is intended to recover from a registry path-string mismatch (\\?\\ vs non-prefixed), consider normalizing without requiring the file to exist (e.g., compute an absolute path with Win32 path APIs and/or try both a non-prefixed and a \\?\\-prefixed variant) or at least guard the retry so normalization failures don’t replace the original detach failure semantics.

    // Retry with the normalized path to handle relative paths and \\?\ prefix mismatches.
    if (result == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND))
    {
        // retry dismounting with the absolute path
        const auto absoluteDisk = wsl::windows::common::filesystem::GetFullPath(filesystem::UnquotePath(disk).c_str());
        value = service.DetachDisk(absoluteDisk.c_str());