| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | hdio | 7i | 74 |
| sunos | hdio | 7i | 72 |
| opensolaris | hdio | 7i | 70 |
| freebsd | hdio | 7i | 58 |
| redhat | hdio | 7i | 58 |
| php | hdio | 7i | 55 |
| centos | hdio | 7i | 54 |
| hpux | hdio | 7i | 52 |
| xfree86 | hdio | 7i | 51 |
| osx | hdio | 7i | 50 |
| mojave | hdio | 7i | 49 |
| debian | hdio | 7i | 48 |
| suse | hdio | 7i | 43 |
| v7 | hdio | 7i | 41 |
| bsd | hdio | 7i | 37 |
| minix | hdio | 7i | 35 |
| posix | hdio | 7i | 32 |
| plan9 | hdio | 7i | 29 |
| opendarwin | hdio | 7i | 28 |