08-17-2007
Famous last words...
Quote:
Don't count those that are in storage or you rarely use, count the ones that are powered on most, if not all, of the day (and night).
Sigh... I have been meaning to power off my old workstation... Well the "count the ones that are powered on most" clause appears after the "Don't count those....you rarely use" clause. The second cause must countermand the first cause. So my unused but powered-up workstation should be counted. I think...
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YouTube
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LEARN ABOUT MINIX
removable-media
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(4) 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(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO
power.conf(4), pm(7D), attach(9E), detach(9E), ddi_prop_create(9F)
Writing Device Drivers
SunOS 5.10 15 Jun 2001 removable-media(9P)