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 25G | iSCSI 10G | iSCSI 10G BASE-T | |
|---|---|---|---|---|---|
| Model number | DW-F900-4HF32R | DW-F900-2HE25R | DW-F900-2HS10S | DW-F900-2HS10B | |
| Number of PCBs | 1 | 1 | 1 | 1 | |
| Host interface | FCP | iSCSI (optical) | iSCSI (optical) | iSCSI (copper) | |
| Data transfer rate (MB/s) | 16 Gbps: 400/800/1,600 32 Gbps: 800/1,600/3,200 |
1,000/2,500 | 1,000 | 100/1,000 | |
| Number of options installed( ): DKB slot used | 2/4/6/ | 2/4/6 | 2/4/6 | 2/4/6 | |
| Number of ports per PCB | 4 | 2 | 2 | 2 | |
| Number of ports per storage system( ): DKB slot used | 8/16/24 | 4/8/12 | 4/8/12 | 4/8/12 | |
| Maximum cable length | Short wave1 | 400 m/190 m/125 m/100 m | 400 m/100 m | 550 m | - |
| Long wave | 10 km | - | - | - | |
| Copper | - | - | - | 50m (cat 6a) | |
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