Dell PowerEdge R940 EMC Installation and Service Manual - Page 32
Drive specifications, Hard drives, Ports and connectors specifications, USB ports, NIC ports
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Drive specifications Hard drives The PowerEdge R940 system supports SAS, SATA, Nearline SAS, NVMe hard drives or SSDs. Table 23. Supported drive options for the PowerEdge R940 system System Description Eight drives system Up to eight 2.5-inch (SAS, SATA or Nearline SAS) front accessible drives in slots 0 through 7 Twenty four drives system Up to twenty four 2.5-inch (SAS, SATA or Nearline SAS) front accessible drives in slots 0 through 23 Twenty four drives system Up to twenty SAS + 4 NVMe SAS/SATA drives in slots 0 to 19 + slots 20 to 23 Twenty four drives system Up to sixteen SAS + 8 NVMe SAS/SATA drives in slots 0 to 15 + slots 16 to 23 Ports and connectors specifications USB ports The PowerEdge R940 system supports: • Two USB 3.0-compliant ports on the front panel • Two USB 3.0-compliant ports on the back panel • One USB 3.0-compliant internal port An optional USB memory key installed inside your system can be used as a boot device, security key, or mass storage device. To boot from the USB memory key, configure the USB memory key with a boot image and then specify the USB memory key in the boot sequence in System Setup. NIC ports The PowerEdge R940 system supports up to four NDC ports on the back panel, which are available in the following configurations: • Four RJ-45 ports that support 10 Mbps, 100 Mbps, and 1000 Mbps • Four RJ-45 ports that support 100 M, 1 G and 10 Gbps • Four RJ-45 ports, where two ports support maximum of 10 G and the other two ports maximum of 1 G • Two RJ-45 ports that support up to 1 Gbps and 2 SFP+ ports that support up to 10 Gbps • Four SFP+ ports that support up to 10 Gbps • Two SFP28 ports that support up to 25 Gbps NOTE: The NDC slot is not hot-pluggable. Serial port The PowerEdge R940 system supports one serial port on the back panel, which is a 9-pin connector, Data Terminal Equipment (DTE), 16550-compliant. 32 PowerEdge R940 technical specifications