Flash Modules - IBM FlashSystem 840 Product Manual

InfiniBand interface card
IBM FlashSystem 840 supports four two-port InfiniBand 40 Gbps cards. A total of eight ports of 40 Gbps
InfiniBand connections are supported per IBM FlashSystem 840.
IBM FlashSystem 840 InfiniBand cards each have two 4X QDR ports. The InfiniBand card ports can
connect to Quad Data Rate (QDR), Double Data Rate (DDR), or Single Data Rate (SDR) InfiniBand HCAs
by using the SCSI RDMA Protocol (SRP). IBM FlashSystem 840 InfiniBand interfaces support SCSI
RDMA Protocol (SRP) only.
Table 4 lists the supported InfiniBand interface card.
Table 4. Supported InfiniBand interface card
Item
QDR IB 4 Port Host Interface Card

Flash modules

FlashSystem 840 provides configurable flash module capacity. All modules are hot-swappable.
FlashSystem 840 can be populated with up to 12 flash modules in increments of 2, 4, 6, 8,10, or 12.
These modules can be either 1 TB, 2 TB, or 4 TB and cannot be intermixed. Capacity can be upgraded by
purchasing the AF1B (1 TB), AF10 (2 TB), or AF11 (4 TB) flash module feature codes as MES upgrades.
Here are the upgrade paths:
Using AF1B (1 TB)
o RAID 0: Start with 2 TB and grow to 4 TB, 6 TB, 8 TB, 10 TB or 12 TB.
o RAID 5: Start with 2 TB and grow to 4 TB, 6 TB, 8 TB, 10 TB.
Using AF10 (2 TB)
o RAID 0: Start with 4 TB and grow to 8 TB, 16 TB, or 24 TB.
o RAID 5: Start with 4 TB and grow to 12 TB or 20 TB.
Using AF11 (4 TB)
o RAID 0: Start with 32 TB and grow to 48 TB.
o RAID 5: Start with 8 TB and grow to 24 TB or 40 TB.
IBM FlashSystem 840 Product Guide
Feature code
AF16
Ports
Eight ports of 40 Gbps QDR
InfiniBand
9