The server supports up to sixteen, drives (depending on the drive backplane configuration) per 4-socket
system. The following types of drives are supported:
– l.8-inch hot-swap Serial Attached SCSI (SAS) solid state drives (SSD)
– 2.5-inch hot-swap Serial Attached SCSI (SAS) hard disk drives (HDD) and solid state drives (SSD)
– 2.5-inch hot-swap Non-Volatile Memory express (NVMe) PCIe solid state drives (SSD)
• PCI expansion slots (depending on the model):
The server provides up to twelve PCIe adapter slots (with two I/O books installed), as listed below:
– The base system provides the following slots:
– Two x16 full-height slots, Gen3, 16 lanes wired (PCIe Gen3, x16)
– One x16 full-height slot, Gen3, 8 lanes wired (PCIe Gen3, x16 (8, 4, 1)
– Two x16 low-profile host bus adapter slots in the Storage book, Gen3, 8 lanes wired each (PCIe
Gen3, x16 (8, 4, 1)
– One x8 Gen3 dedicated ML adapter slot, 8 lanes wired (non-standard PCIe connector)
– The optional half-length I/O book provides the following slots:
– One x16 full-height slot, Gen3, 16 lanes wired (PCIe Gen3, x16)
– Two x8 full-height slots, Gen3, 8 lanes wired each (PCIe Gen3, x8)
– The optional full-length I/O book provides the following slots:
– Two x16 full-height slots, Gen3, 16 lanes wired each (PCI3 Gen3, x16)
– One x8 full-height slot, Gen2, 4 lanes wired (PCIe Gen3, x8 (4, 1)
Note: The optional also supports full-length, full height and low-profile PCIe adapters.
• Power supply:
The server supports up to four of the following power supplies:
– 1400-watt ac input power supplies
– 900-watt ac input power supplies
– 750-watt -48 volt to -60 volt dc input power supplies
In addition, consider the following information:
– A base model (4-socket node) comes standard with one 900-watt or one 1400-watt power supply
(depending on the model).
– Maximum of four 900-watt (110 or 220 V ac auto-sensing) or four 1400-watt ac (110 or 220 V ac auto-
sensing) hot-swap power supplies for supported power supply configurations per 4-socket node.
– Four 1400-watt hot-swap power supplies fed from a 220 V ac input source provides N+N redundancy
support for a full configuration per 4-socket node.
– Four 750-watt hot-swap power supplies fed from a -48 volt to -60 volt dc input source provides N+N
redundancy support for limited configurations per 4-socket node.
– Four 900-watt or four 1400-watt hot-swap power supplies fed from a 110 V input source provides N+N
redundancy support for limited configurations per 4-socket node.
• Hot-swap fans:
The server supports up to 10 fan packs with dual-motor, counter-rotating, speed-controlled hot-swap
fans (two fans in each fan pack for a total of 20 fans).
• RAID controllers:
The following RAID adapter options are available for the server:
Chapter 1. The Lenovo System x3850 X6 and x3950 X6 Type 6241 server 7
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