Dell Alienware 0JYTRGA00 Owner's Manual

Contents

26 CHAPTER 4: USING YOUR DESKTOPRAID Level 5RAID level 5 uses data parity. RAID level 5 stripes both data and parity informationacross three or more drives. It provides data striping at the byte level and alsostripe error correction information (rotating parity array). This results in excellentperformance and good fault tolerance.If a drive failure occurs, subsequent read and write operations are directed to theother surviving drives. A replacement drive can then be rebuilt using the datafrom the surviving drives. Since data is duplicated on the primary and additionaldrives, four 120 GB collectively have a maximum of 360 GB on which to storedata.A1B1C1DpA2B2CpD1A3BpC2D2ApB3C3D3RAID Level 10A RAID 10 array combines the high data access rate of a RAID level 0 array and thedata protection (redundancy) of a RAID level 1 mirror by striping data across twodrives and mirroring that striped data on a set of two drives.RAID 1+0If a drive failure occurs, subsequent read and write operations are directed to theother surviving drives. A replacement drive can then be rebuilt using the datafrom the surviving drives. Also, because data is duplicated on the primary andadditional drives, four 120 GB collectively have a maximum of 240 GB on whichto store data.