REMOVABLE-MEDIA(9P) Kernel Properties for Drivers REMOVABLE-MEDIA(9P)

NAME

removable-media - removable media device property

DESCRIPTION

A device that supports removable media--such as CDROM, JAZZ, and ZIP
drives--and that supports power management and expects automatic
mounting of the device via the volume manager should export the
boolean (zero length) property removable-media. This property enables
the system to make the power state of the device dependent on the
power state of the frame buffer and monitor. See the power.conf(5)
discussion of the device-dependency-property entry for more
information.


Devices that behave like removable devices (such as PC ATA cards,
where the controller and media both are removed at the same time)
should also export this property.

EXAMPLES

Example 1 removable-media Entry


An example of a removable-media entry from the .conf file of a driver
is shown below.


# This entry keeps removable media from being powered down unless
# the console framebuffer and monitor are powered down
#
removable-media=1;

Example 2: Implementation in attach()

Below is an example of how the entry above would be implemented in
the attach(9E) function of the driver.


xxattach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
...
if (ddi_prop_create(DDI_DEV_T_NONE, dip, DDI_PROP_CANSLEEP,
"removable-media", NULL, 0)) != DDI_PROP_SUCCESS)
goto failed;
...
}

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface stability | Committed |
+--------------------+-----------------+

SEE ALSO

pm(4D), power.conf(5), attach(9E), detach(9E), ddi_prop_create(9F)


Writing Device Drivers

June 15, 2001 REMOVABLE-MEDIA(9P)