Determine the Available Existing Storage Capacity

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You must first determine how much existing storage capacity is available before deciding how to carve that storage up for the disk groups for each cluster that you create.

The number and capacity of the drives installed in the Exadata Storage Servers vary, depending on the type of drives that are installed:

X7-2L Exadata Storage Server:
- 8 x 6.4 TB Extreme Flash drives
- 12 x 10 TB High Capacity drives
X6-2L Exadata Storage Server:
- 8 x 3.2 TB Extreme Flash drives
- 12 x 8 TB High Capacity drives
X5-2L Exadata Storage Server:
- 8 x 1.6 TB Extreme Flash drives
- 12 x 8 TB High Capacity drives

In addition, the total capacity that you have available depends on the level of redundancy that you want to set for the ASM disk groups (normal redundancy or high redundancy).

The following tables provide capacity information for the types of Exadata Storage Servers.

Table 1 X7-2L Single Storage Server Capacities

Capacity Type	8 x 6.4 TB Extreme Flash Drives	12 x 10 TB High Capacity Drives
Raw disk capacity	51.2 TB	120 TB
Usable mirrored capacity (ASM normal redundancy)	20 TB	50 TB
Usable triple mirrored capacity (ASM high redundancy)	17.2 TB	37.5 TB

Table 2 X6-2L Single Storage Server Capacities

Capacity Type	8 x 3.2 TB Extreme Flash Drives	12 x 8 TB High Capacity Drives
Raw disk capacity	25.6 TB	96 TB
Usable mirrored capacity (ASM normal redundancy)	10 TB	40 TB
Usable triple mirrored capacity (ASM high redundancy)	8.6 TB	30 TB

Table 3 X5-2L Single Storage Server Capacities

Capacity Type	8 x 1.6 TB Extreme Flash Drives	12 x 8 TB High Capacity Drives
Raw disk capacity	12.8 TB	96 TB
Usable mirrored capacity (ASM normal redundancy)	5 TB	40 TB
Usable triple mirrored capacity (ASM high redundancy)	4.3 TB	30 TB