Specifications

14 en | RAID Functions: Introduction SCSI to SATA RAID Subsystem | Administrator’s Manual
F.01U.027.802 | V1 | 2006.11 Bosch Security Systems
1.3.6 RAID3
Disk Striping with Dedicated Parity Disk
RAID3 performs Block Striping with Dedicated Parity. One drive member is dedicated to stor-
ing the parity data. When a drive member fails, the controller can recover/regenerate the lost
data of the failed drive by comparing and re-calculating data on the remaining drives.
Fig. 1.7 FRAID3
1.3.7 RAID5
Striping with Interspersed Parity
RAID5 is similar to RAID3 but the parity data is not stored in a dedicated hard drive. Parity
information is interspersed across the drive array. In the event of a drive failure, the controller
can recover/regenerate the lost data of the failed drive by comparing and re-calculating data
on the remaining drives.
Fig. 1.8 RAID5
RAID (0+1)
Minimum Disks Required 3
Capacity N-1
Redundancy Yes
RAID5
Minimum Disks Required 3
Capacity N-1
Redundancy Yes