Harmonic MediaGrid Installation And Configuration Manual page 22

Chapter 1 System Overview and Requirements
About the Capacity Optimized RAID Configuration
In the capacity optimized RAID configuration, the disk drives are configured in a Dual Parity (DP)
RAID array, ensuring that the system can continue to function despite the failure of any two disk
drives. This configuration optimizes storage capacity at the cost of bandwidth. A capacity
optimized RAID set typically uses a 6+2 configuration.
NOTE: In the ContentStore 5840, capacity optimized RAID sets use a 5+2 configuration.
About the Performance Optimized RAID Configuration
In a system configured for performance optimized RAID, each RAID set has a single redundant
disk drive, and each enclosure has N total number of hot spares. This configuration optimizes
bandwidth at the cost of storage capacity.
IMPORTANT: If using SystemManager to create RAID sets, make sure that all ContentServers and
ContentStores in a stack are configured with the same RAID geometry.
Table 1–1: RAID Configurations for the ContentServer 4000 and ContentStore 4240
# Drives
24
24
24
24
24
24
Table 1–2: RAID Configurations for the ContentServer 3000 and ContentStore 3160
# Drives
16
16
16
16
16
16
16
16
16
16
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RAID Sets Capacity per Drive
3 x (6+2) 2 TB
3 x (6+2) 4 TB
3 x (6+2) 6 TB
7 x (2+1) +3 2 TB
7 x (2+1) +3 4 TB
7 x (2+1) +3 6 TB
RAID Sets Capacity per Drive
2 x (6+2) 1 TB
2 x (6+2) 2 TB
2 x (6+2) 3 TB
2 x (6+2) 4 TB
2 x (6+2) 6 TB
5 x (2+1) +1 1 TB
5 x (2+1) +1 2 TB
5 x (2+1) +1 3 TB
5 x (2+1) +1 4 TB
5 x (2+1) +1 6 TB
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Supported RAID Configurations
Storage Capacity
36 TB
72 TB
108 TB
28 TB
56 TB
84 TB
Storage Capacity
1 2 TB
24 TB
36 TB
48 TB
72 TB
10 TB
20 TB
30 TB
40 TB
60 TB
Harmonic MediaGrid Release 4.1