Front-end modules

Virtual Storage Platform E590 and E790 Hardware Reference Guide

Part Number

The front-end modules (FEMs), also called channel boards (CHBs), control the transfer of data between the host and cache memory. The storage system supports Fibre Channel (FC) and iSCSI front-end modules (FEMs) for attachment to host servers. The front-end module LEDs indicate the operating status of the module.

Specification Fibre 32-Gbps Ready iSCSI 10G iSCSI 10G BASE-T
Model number DW-F900-4HF32R DW-F900-2HS10S DW-F900-2HS10B
Number of PCBs 1 1 1
Host interface FCP iSCSI (optical) iSCSI (copper)
Data transfer rate (MB/s) 16 Gbps: 400/800/1,600

32 Gbps: 800/1,600/3,200

1,000 100/1,000
Number of options installed( ): DKB slot used 2/4/6/ 2/4/6 2/4/6
Number of ports per PCB 4 2 2
Number of ports per storage system( ): DKB slot used 8/16/24 4/8/12 4/8/12
Maximum cable length Short wave1 400 m/190 m/125 m/100 m 550 m -
Long wave 10 km - -
Copper - - 50m (cat 6a)
  1. When 50/125-mm laser optimized multi-mode Fibre cable (OM3 or OM4) is used. When using other cable types, contact customer support.