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Suspending System Operation
2-5
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 paragraphs.
2. Observe the Power icon in the Status display to determine which suspend mode
your system is using.
• 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. The Battery Gauge icon in the
Status display indicates the battery charge level. A fully charged battery pack
can maintain data in RAM for approximately 10 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 Off state. When the system is in
Suspend-to-Disk mode, 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. A fully charged battery pack will discharge to the critically low level
after about 45 days in the 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 or
Suspend-to-Disk modes 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.
• The system uses a small amount of battery power when in Suspend-to-RAM
mode. Eventually, the battery will become fully discharged.
Note: If you will not be using the system for an extended period of time, shut down the
system rather than using Suspend-to-RAM mode.