HPUX : Types of RAID

Types of RAID

Overview

Types of RAID

Procedures

•RAID 0:Striping •RAID 1:Mirroring •RAID 1+0: Mirroring+Striping •RAID 3:Striping with parity •RAID 5:Striping with distributed parity •RAID 5DP:Striping with redundant distributed parity Array Benefits Disk arrays offer several advantages over traditional diskstorage: •Improved scalability: Many disk arrays provide hundredsof terabytes of diskspace. •Improved data availability: Disk arrays have multiple redundant components to ensure that data remains available even when a disk, controller, or power supply fails. When disks do fail, the array management software makes it very easy to replace the failed component without causing downtime. •Improved performance:Disk arrays provide a variety of striping options to ensure load balancing across multiple disks. Most diskarrays include very large caches, too, so I/O requestscan be serviced with very low latency. •Improved flexibility:Disk arrays make it very easy to make additional space available when necessary, andre-allocate space that isunderutilized. •Improved manageabilityToday’s arrays include sophisticated management software to simplify monitoring, performance tuning, and troubleshooting.

Keywords

RAID , ARRAY