HP Xw6400 Software RAID in Linux Workstations - Page 1

Software RAID in Linux Workstations Mini-White Paper Introduction...3 RAID Basics ...3 RAID Overview ...3 Software RAID in Linux ...3 Performance and Bottlenecks ...4 RAID Levels ...4 RAID-Linear: Concatenating Disks...4 RAID-0: Striping ...4 RAID-1: Mirroring...5 RAID-2: Error Checking and Correction 6 RAID-3: Byte-Level Striping with Parity Disk 6 RAID-4: Block-Level Striping with Parity Disk 6 RAID-5: Block-Level Striping with Distributed Parity 6 Additional RAID Levels...7 RAID Configuration Strategies ...7 Performance ...7 Capacity versus Fault-Tolerance ...7 Cost ...7 RAID Performance Considerations ...8 Configuring Red Hat Enterprise Linux with Software RAID 8 Manual Setup of Software RAID Data Partitions 11 Manual Configuration Examples...12 RAID-0 ...12 RAID-1 ...12 RAID-5 ...13 RAID-10 ...13 Disk Failure and Recovery...14 Spare Disks and Disk Failure ...14 Multiple Disk Failure ...15 Additional Configuration Information 15