Disk ioctls

Solaris disk drivers need to support a minimum set of ioctl commands specific to Solaris disk drivers. These I/O controls are specified in the dkio(7) manual page. Disk I/O controls transfer disk information to or from the device driver. A Solaris disk device is one that is supported by disk utility commands such as format(1M) and newfs(1M). Table 11–1 lists the mandatory Sun disk I/O controls.

Table 11–1 Mandatory Solaris Disk ioctls

ioctl	Description
DKIOCINFO	Returns information describing the disk controller
DKIOCGAPART	Returns a disk's partition map
DKIOCSAPART	Sets a disk's partition map
DKIOCGGEOM	Returns a disk's geometry
DKIOCSGEOM	Sets a disk's geometry
DKIOCGVTOC	Returns a disk's Volume Table of Contents
DKIOCSVTOC	Sets a disk's Volume Table of Contents