Lenovo ThinkSystem SR645 - Page 114

Rules you need to follow when installing or replacing a PCIe adapter.
• Slot priority for most PCIe adapters:
– One processor installed: Slot 1, slot 2
– Two processors installed: Slot 1, slot 3, slot 2
• Slot priority exceptions:
– CFF RAID/HBA adapters are always installed on slot 5.
– P2200 GPU is always installed on slot 2.
– The following two Mellanox ConnectX-6 adapters are always installed on slot 1:
– Mellanox ConnectX-6 HDR IB/200GbE Single Port x16 PCIe Adapter
– Mellanox HDR Auxiliary x16 PCIe 3.0 Connection Card
• Gen 3 riser cards only support Gen 3 adapters.
• Gen 4 riser cards support both Gen 3 and Gen 4 adapters.
• Gen 3 and Gen 4 SFF RAID adapters are available on the following server models when one processor is
installed.
– Server models with 8 x 2.5-inch front drive bays (SAS/SATA)
– Server models with 4 x 2.5-inch front drive bays (SAS/SATA)
– Server models with 4 x 3.5-inch front drive bays (SAS/SATA)
• Gen 3 and Gen 4 internal SFF RAID adapters are available on the following server models when two
processors are installed.
– Server models with 10 x 2.5-inch front drive bays (6 SAS/SATA +4 AnyBay, 10 AnyBay, or 10 NVMe)
– Server models with 4 x 3.5-inch front drive bays (AnyBay)
– Server models with 2 x 2.5-inch rear drive bays (SAS/SATA)
• Gen 4 internal CFF RAID/HBA adapters are available on the following server models and when two
processors are installed.
– Server models with 8 x 2.5-inch front drive bays (SAS/SATA)
– Server models with 10 x 2.5-inch front drive bays (6 SAS/SATA +4 AnyBay, 10 AnyBay, or 10 NVMe)
– Server models with 4 x 3.5-inch front drive bays (AnyBay)
– Server models with 2 x 2.5-inch rear drive bays (SAS/SATA)
• One super capacitor module is required for each 930/940 series internal RAID adapter. Locations and
quantities of RAID super capacitors vary by models:
Table 27. Super capacitor installation rules
Server
model
Max.
qty.
Installa-
tion
priority
With standard heat
sinks
With performance
heat sinks
Cable
Server
models with
2.5'' chassis
3
Super cap
1---> 2---
>3
– Super cap 1 on front
chassis
– Super cap 2 and 3 on
front chassis
Super cap 1 on front
chassis
– Long cable: not for
CFF RAID/HBA
– Short cable: for CFF
RAID/HBA
Server
models with
3.5'' chassis
2
Super cap 1 and 2 on
front chassis
Super cap 1 in an low-
profile riser cage
Long cable
104 ThinkSystem SR645 Maintenance Manual