Sleep Mode; Hibernate Mode; Configuring Power Management Settings; About Raid Configurations - Dell OptiPlex 755 User Manual

Sleep Mode

Sleep mode conserves power by turning off the display and the hard drive after a predetermined period of
inactivity (a time-out). When the computer exits sleep mode, it returns to the same operating state it
was in before entering sleep mode.
To enter sleep mode in Windows Vista, click Start
menu, and then click Sleep.
To exit sleep mode, press a key on the keyboard or move the mouse.

Hibernate Mode

Hibernate mode conserves power by copying system data to a reserved area on the hard drive and then
completely turning off the computer. When the computer exits hibernate mode, it returns to the same
operating state it was in before entering hibernate mode.
To manually enter hibernate mode in Windows Vista, click Start
corner of the Start menu, and then click Hibernate.

Configuring Power Management Settings

You can use the Windows Power Options Properties to configure the power management settings on your
computer.
To access Power Options Properties, click Start
Power Options.

About RAID Configurations

This section provides an overview of the RAID configuration that you may have selected when you
purchased your computer. A number of RAID configurations are available in the computer industry for
different types of uses. Your Dell computer supports RAID level 0 and RAID level 1. A RAID level 0
configuration is recommended for high-performance programs, while RAID level 1 is recommended for
users that desire a high level of data integrity.
NOTE:
RAID levels do not represent a hierarchy. A RAID level 1 configuration is not inherently better or worse than
a RAID level 0 configuration.
®
The Intel RAID controller on your computer can only create a RAID level configuration using two
physical drives. The drives should be the same size to ensure that the larger drive does not contain
unallocated (and therefore unusable) space.
NOTE:
If you purchased your Dell computer with RAID, your computer has been configured with two hard drives
that are the same size.
, click the arrow in the lower-right corner of the Start
, click the arrow in the lower-right
→ Control Panel→ System and Maintenance→
Advanced Features
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