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Suspending System Operation
2-7
The Power icon either flashes or is not displayed when system operation is
suspended, depending on how your system is configured. At this point, programs
that were running are stopped, active data is saved, and the system enters one of
two different low-power states, or suspend modes, as explained in the following.
2. Observe the Power icon in the Status display to determine which suspend mode
your system is using. (Note that the Battery Gauge icon is visible in the Status
display.)
• Power icon is blinking: Suspend-to-RAM mode
In this mode, active data is saved by maintaining power to RAM while most
other system components are powered off. A fully charged battery pack can
maintain data in RAM for approximately 3 days; a partially charged battery
pack will maintain data in RAM for proportionately less time.
• Power icon is not displayed: Suspend-to-Disk mode
In this mode, active data is stored on the hard disk drive and power usage is
reduced to the same level used in the Fully Off state. You can leave the
Power switch in the On position or you can turn off the Power switch when
the system is in Suspend-to-Disk mode. If you turn off the Power switch, the
Battery Gauge icon is not visible in the Status display. In this mode, there is
no danger of losing data if battery power is lost; however, a fully charged
battery pack will discharge to the critically low level after about 30 days in
the Fully Off state.
If you have successfully performed this procedure, system operation is now
suspended. Refer to “Resuming System Operation” later in this chapter to resume
system operation. Also, note the following with regard to suspending system
operation:
• You can remove the battery pack while the system is in Suspend-to-RAM mode in
order to install a charged battery pack. To prevent losing unsaved data, wait until
system operation is suspended before you remove the battery pack.
• Your system may be configured to suspend operation automatically after a period
of inactivity.
• Your system may be configured to enter Suspend-to-Disk mode automatically
after a period of time in Suspend-to-RAM mode.
Caution
Do not turn off the Power switch while the system is in Suspend-to-RAM
mode. Doing so will cause your unsaved data to be lost.