Sun Microsystems Sun Blade 100, Service Manual

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D-28 Sun Blade 100 Service Manual • October 2000
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If you have a third-party composite keyboard with PS/2 mouse, and it is the first
one to be probed, it will become the console keyboard/mouse even if the PS/2
mouse is not plugged in.
Note – If another USB mouse is plugged into the system, it will not work because
the second mouse is not configured as the console mouse.
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On a system with multiple USB keyboards, if you unplug the console keyboard,
the next available USB keyboard does not become the console keyboard. The next
hot plugged keyboard will become the console keyboard.
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On a system with more than one USB mouse, if you unplug the console mouse,
the next available USB mouse doesn’t become the console mouse. The next hot
plugged mouse will become the console mouse.
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Only a 2- or 3-button mouse is supported. A wheel-on-wheel mouse acts like a
plain button mouse. A mouse with more than 3 button functions like a 3-button
mouse.
D.2 USB Power Management
USB power management is “leaf” first and then “bottoms-up.” This means that all
leaf devices go into low-power mode first. Following that, the lowest hub goes into
low-power mode first, followed by hubs in the next upper level. This follows all the
way to the top root hub.
Note –
As a rule of thumb, the deeper the USB device tree, the poorer USB power
management becomes.
D.2.1 Storage Devices
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Use
pcfs
(7fs) and
udfs
(7fs) with USB mass storage devices. These file systems
are platform neutral and data can be easily shared between platforms. UFS is also
supported, but requires syncing on panic. The driver currently supports syncing.
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Each mass storage device has a device node called
disk
. Each node receives a
unique controller number. A device with multiple LUNs will get the same
controller number but different
d
number
(/dev/[r]dsk/cXtYdZsN)
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On hot remove mass storage drives,
/dev/[r]dsk
links remain persistent. Type
devfsadm -C
to remove stale links.
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System Checkpoint/Resume will fail if a file system is mounted.