Dynamic Disk Pool (Ddp) Technology - Quantum DXi6900 User Manual

Chapter 1: System Description
Supported RAID Configurations
Figure 15: DXi6900-S Node RAID Sets
1 - SDD Slot 0
2 - SDD Slot 1
3 - SDD Slot 2
4 - SDD Slot 3

Dynamic Disk Pool (DDP) Technology

Dynamic Disk Pool (DDP) technology is a new alternative to traditional RAID configuration. DDP distributes
data, parity information, and spare capacity across a pool of drives, providing the following benefits:
Faster drive recovery
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Easier storage expansion
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Dynamic re-balancing of data across drives
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Better data availability
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The DXi6900 Array modules (RBODs) and Expansion modules (EBODs) use Dynamic Disk Pool
technology for data storage (see
module are configured in a single DDP pool.
The Dynamic Disk Pool does not include a physical hot spare. However, enough disk space is reserved to
provide the equivalent of a hot spare. And similar to RAID 6, a DDP pool can tolerate up to two drive faults.
Quantum DXi6900 User's Guide
1
3
2
5 - SDD Slot 4
6 - SDD Slot 5
7 - SDD Slot 6
8 - SDD Slot 7
Figure 16 on the next
5 7 9
4 6 8
9 - SDD Slot 8
10 - SDD Slot 9
11 - SDD Slot 10
12 - SDD Slot 11
page). All hard disk drives in an Array or Expansion
11 13
10 12
13 - SDD Slot 12
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