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      "composites": [],
      "content": "graph LR\nIO((I/O request)) --> SR(sync read queue)\nIO --> SW(sync write queue)\nIO --> AR(async read queue)\nIO --> AW(async write queue)\nIO --> SCRUB(scrub queue)\nIO --> TRIM(trim queue)\nSR --> DISKQ(disk queue)\nSW --> DISKQ\nAR --> DISKQ\nAW --> DISKQ\nSCRUB --> DISKQ\nTRIM --> DISKQ\nDISKQ --> DISK((disk))\n",
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