Ohai gives this as an example output:

```json
{
  "ram0": {
    "size": "131072",
    "removable": "0"
  },
  "ram1": {
    "size": "131072",
    "removable": "0"
  },
  "ram2": {
    "size": "131072",
    "removable": "0"
  },
  "ram3": {
    "size": "131072",
    "removable": "0"
  },
  "ram4": {
    "size": "131072",
    "removable": "0"
  },
  "ram5": {
    "size": "131072",
    "removable": "0"
  },
  "ram6": {
    "size": "131072",
    "removable": "0"
  },
  "ram7": {
    "size": "131072",
    "removable": "0"
  },
  "ram8": {
    "size": "131072",
    "removable": "0"
  },
  "ram9": {
    "size": "131072",
    "removable": "0"
  },
  "ram10": {
    "size": "131072",
    "removable": "0"
  },
  "ram11": {
    "size": "131072",
    "removable": "0"
  },
  "ram12": {
    "size": "131072",
    "removable": "0"
  },
  "ram13": {
    "size": "131072",
    "removable": "0"
  },
  "ram14": {
    "size": "131072",
    "removable": "0"
  },
  "ram15": {
    "size": "131072",
    "removable": "0"
  },
  "loop0": {
    "size": "0",
    "removable": "0"
  },
  "loop1": {
    "size": "0",
    "removable": "0"
  },
  "loop2": {
    "size": "0",
    "removable": "0"
  },
  "loop3": {
    "size": "0",
    "removable": "0"
  },
  "loop4": {
    "size": "0",
    "removable": "0"
  },
  "loop5": {
    "size": "0",
    "removable": "0"
  },
  "loop6": {
    "size": "0",
    "removable": "0"
  },
  "loop7": {
    "size": "0",
    "removable": "0"
  },
  "vda": {
    "size": "52428800",
    "removable": "0",
    "vendor": "0x1af4"
  },
  "vdb": {
    "size": "52428800",
    "removable": "0",
    "vendor": "0x1af4"
  },
  "dm-0": {
    "size": "36962304",
    "removable": "0"
  },
  "dm-1": {
    "size": "2088960",
    "removable": "0"
  }
}
```

My thinking was that although this regex is pretty liberal, the use of it is optional and the user can always submit a patch to improve its flexibility. For now I'm happy to scratch my own itch. :)