Disk layout summary
The available disk layouts differ in their support of device formats, the DASD DIAG access method, and the maximum number of partitions.
| Disk layout | ECKD device format | FBA device format | DIAG access method support (z/VM® only) | Maximum number of partitions | Formatting tool |
|---|---|---|---|---|---|
| Compatible disk layout | Yes | No | No | 3 | dasdfmt |
| Linux® disk layout | Yes | No | Yes | 1 | dasdfmt |
| CMS (z/VM only) | Yes | Yes | Yes | 1 | z/VM tools |