Setting Up and Using Your Computer 25Using RAID with Hard Drive PasswordsIf you are using a hard-drive security option available in system setup (see page 104), you shouldnot use a RAID configuration. Using a RAID configuration requires that the hard drive password becleared to allow data access.RAID Level 1RAID level 1 uses a data-redundancy storage technique known as "mirroring." When data is writtento the primary drive, the data is then duplicated—or mirrored—on the other drive. A RAID level 1configuration sacrifices high-data access rates for its data redundancy advantages.If a drive failure occurs, subsequent read and write operations are directed to the surviving drive. Areplacement drive can then be rebuilt using the data from the surviving drive. Also, because data isduplicated on both drives, two 120-GB RAID level 1 drives collectively have a maximum of 120-GBon which to store data.Configuring Your Computer for RAIDYou may want to configure your computer for RAID at some point, if you did not select a RAIDconfiguration when you purchased your computer. You must have at least two hard drivesinstalled in your computer to set up a RAID configuration. For instructions on how to install ahard drive, see "Hard Drive" on page 79.You can use one of two methods to configure RAID hard drive volumes. One method uses theIntel RAID Option ROM utility and is performed before you install the operating system ontothe hard drive. The second method uses the Intel Matrix Storage Manager, or Intel MatrixStorage Console, and this method is performed after you have installed the operating systemhard drive 1segment 1segment 2segment 3hard drive 2segment 4segment 5segment 6segment 1 duplicatedsegment 2 duplicatedsegment 3 duplicatedsegment 4 duplicatedsegment 5 duplicatedsegment 6 duplicatedserial ATA RAIDconfigured forRAID level 1