| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | hdio | 7i | 374 |
| opensolaris | hdio | 7i | 366 |
| sunos | hdio | 7i | 351 |
| redhat | hdio | 7i | 340 |
| centos | hdio | 7i | 333 |
| php | hdio | 7i | 327 |
| hpux | hdio | 7i | 321 |
| minix | hdio | 7i | 318 |
| xfree86 | hdio | 7i | 317 |
| mojave | hdio | 7i | 316 |
| debian | hdio | 7i | 305 |
| osx | hdio | 7i | 303 |
| opendarwin | hdio | 7i | 286 |
| v7 | hdio | 7i | 285 |
| suse | hdio | 7i | 274 |
| freebsd | hdio | 7i | 240 |
| bsd | hdio | 7i | 232 |
| plan9 | hdio | 7i | 214 |
| posix | hdio | 7i | 212 |