Lenovo ThinkSystem SR645 - Drive Bay Configurations and Requirements

Supported processors by server model
Server model
Processor
Group C Group B Group A Group D
2
Group Z
120 W 155 W
180 W, 200 W 225 W, 240 W
280 W
4 x 2.5''
√
4
4 x 3.5''
√ √ √ √
3
8 x 2.5''
√ √ √ √
3
10 x 2.5''
√ √ √
1
√
3
1. For the server model, the 200W processors are supported only when:
• No 2.5-inch rear drives are installed
2. Maximum GPU quantity supported:
• When group C, group B, or group A processors are installed, the server supports up to 3 GPUs;
• When group D processors are installed, the server supports up to 2 GPUs.
3. The type of processors are supported only when:
• No 2.5-inch rear drives installed
• No more than two GPUs installed (supported slots: 1, 3)
4. The type of processors are supported only when:
• Performance fans are installed.
• No 2.5-inch or 7mm rear drives are installed
Drive bay configurations and requirements
Understanding the drive bay configurations supported by the server helps you better and the requirements
for hardware configurations.
Depending on models, the server supports:
• Up to ten 2.5-inch or four 3.5-inch SAS/SATA/NVMe front drives
• Up to two 2.5-inch SAS/SATA or two 7mm SAS/SATA rear drives
• Up to two M.2 SATA/NVMe drives
For a list of supported drives, see:
https://static.lenovo.com/us/en/serverproven/index.shtml
Drive bay combinations
The following table shows the supported drive bay combinations for the chassis with 3.5-inch/2.5-inch front
drive bays.
Table 23. 2.5-inch drive bay combinations
No.
Total
drives
Front bays Rear bays
7mm drives M.2 drives
SAS/SATA
AnyBay
NVMe SAS/SATA SATA/NVMe SATA/NVMe
1 4 4
Optional
2a 8 8
Optional Optional
Chapter 4. Hardware replacement procedures 99