The following table lists the device characteristic constants:
| Constant | Meaning |
| IOCAP_ATOMIC | |
| IOCAP_ATOMIC512 | |
| IOCAP_ATOMIC1K | |
| IOCAP_ATOMIC2K | |
| IOCAP_ATOMIC4K | |
| IOCAP_ATOMIC8K | |
| IOCAP_ATOMIC16K | |
| IOCAP_ATOMIC32K | |
| IOCAP_ATOMIC64K | |
| IOCAP_SAFE_APPEND | |
| IOCAP_SEQUENTIAL | |
| IOCAP_UNDELETABLE_WHEN_OPEN | |
| IOCAP_POWERSAFE_OVERWRITE |