Chapter 1 System Overview and Requirements
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Harmonic MediaGrid Release 4.1
Supported RAID Configurations
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
Table 1–2: RAID Configurations for the ContentServer 3000 and ContentStore 3160
# Drives
RAID Sets
Capacity per Drive
Storage Capacity
24
3 x (6+2)
2 TB
36 TB
24
3 x (6+2)
4 TB
72 TB
24
3 x (6+2)
6 TB
108 TB
24
7 x (2+1) +3
2 TB
28 TB
24
7 x (2+1) +3
4 TB
56 TB
24
7 x (2+1) +3
6 TB
84 TB
# Drives
RAID Sets
Capacity per Drive
Storage Capacity
16
2 x (6+2)
1 TB
12 TB
16
2 x (6+2)
2 TB
24 TB
16
2 x (6+2)
3 TB
36 TB
16
2 x (6+2)
4 TB
48 TB
16
2 x (6+2)
6 TB
72 TB
16
5 x (2+1) +1
1 TB
10 TB
16
5 x (2+1) +1
2 TB
20 TB
16
5 x (2+1) +1
3 TB
30 TB
16
5 x (2+1) +1
4 TB
40 TB
16
5 x (2+1) +1
6 TB
60 TB
