IBM FlashSystem 820 and IBM FlashSystem 720

 IBM FlashSystem 820 and IBM FlashSystem 720 at a glance*
Series IBM FlashSystem 820 IBM FlashSystem 720
Model 9831-AE2 9831-AE2
Flash type eMLC SLC
  10 TB 20 TB 5 TB 10 TB
Usable capacity (terabyte [TB]/ tebibyte [TiB]) 12.4 TB/11.3 TiB 24.7 TB/22.5 TiB 6.2 TB/5.6 TiB 12.4 TB/11.3 TiB
Usable capacity RAID 5 (TB/TiB) 10.3 TB/9.4 TiB 20.6 TB/18.8 TiB 5.2 TB/4.7 TiB 10.3 TB/9.4 TiB
Raw maximum capacity (TB/TiB) 16.5 TB/30 TiB 33 TB/30 TiB 8.3 TB/7.5 TiB 16.5 TB/30 TiB
Minimum latency
Write 25 µs 25 µs
Read 110 µs 100 µs
Read (from host) 160 µs 145 µs
Maximum IOPS 4KB
100% read 525k 525k
Mixed 70/30% read/write 430k 450k
100% write 280k 400k
Maximum bandwidth 256 KB
Read 3.3 GB/s (Fibre Channel)
5 GB/s (InfiniBand)
3.3 GB/s (Fibre Channel)
5 GB/s (InfiniBand)
Write 2.8 GB/s (Fibre Channel)
2.8 GB/s (InfiniBand)
3.3 GB/s (Fibre Channel)
4 GB/s (InfiniBand)
Power 300 Watts 350 Watts
Cooling 1023 BTU/hr. 1194 BTU/hr.
Reliability High-availability hardware configuration
  Two-dimensional flash RAID Hot-swappable flash modulesRedundant interfaces Redundant, hot-swappable power supplies
Redundant management control ports
N+1 batteries
2n fans
Supported RAID levels 0, 5
Connectivity options 4 x 8 Gb/s Fibre Channel
4 x 40 Gb/s QDR InfiniBand
Client operating system support For a current list of platforms supported, please visit the IBM System Storage Interoperation Centre (SSIC)
Maximum volume support (LUNs) 1,024
Management interfaces Web, SSH, Telnet
Enclosure dimensions (H x W x D) 1U x 432 mm x 638 mm (1U x 17 in. x 25 in.)
Weight 13.3 kg / 29.3 lb
Environmental requirements 10°C – 35°C (50°F – 95°F) operating temperature at -30.5 m – 300 m (-100 ft – 984.25 ft) altitude-10°C – 50°C (14°F – 122°F) non-operational20% – 80% RH operating10% – 90% RH non-operational 0.1g rms operational vibration0.8g rms operational shock3.5g 3ms half-sine pulse vertical non-operational
Regulatory compliance Safety: IEC/EN 60950, CB Certificate, UL60950-1 CAN/CSA-C22.2 No.60950-1, CE Mark
Emissions Class A: EN55022/CISPR 22, FCC Part 15 Class A, ICES-003 Issue 4 Class A

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