PowerStore Calculator
NVMe-only sizing for Dell EMC PowerStore: estimate RAID-protected usable and effective capacity.
1. Appliance & drive configuration
Max for PowerStore 9200T: 93 drives
Single = tolerate 1 drive failure per resiliency set, Double = tolerate 2 drive failures per resiliency set.
2. Data reduction assumption
Typical values for PowerStore are around 2:1 – 3:1, but this is workload-dependent.
Ratio
2.0:1
Capacity summary
Raw capacity (all NVMe)
73.4 TiB
Usable after RAID & virtual spares
62.1 TiB
Effective logical capacity (with 2.0:1 data reduction)
124.2 TiB
Tolerance levelDouble Drive Failure
Selected width16+2 (16 data / 2 parity)
Resiliency sets (max 50 drives)1
Virtual spare drives (1 per set)1
Drives used for RAID stripes20
RAID efficiency (data / total)88.9%
Executive summary
- Configuration: PowerStore 9200T, 21× NVMe TLC 3.84 TB
- Usable NVMe capacity ≈ 62.1 TiB.
- With data reduction 2.0:1, effective logical capacity ≈ 124.2 TiB.
- Layout: 1 resiliency set(s), width 16+2, virtual spares: 1.
- Numbers are approximate and intended for initial sizing and presentations, not final design.