3-12
Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
Chapter 3 Maintaining the Server
Installing or Replacing Server Components
Replacing Hard Drives or Solid State Drives
This section includes the following topics:
• Drive Population Guidelines, page 3-12
• Drive Replacement Procedure, page 3-13
Drive Population Guidelines
The server can operate with one or two drive bay modules. Each drive bay module can hold up to eight
2.5-inch drives for a total of 16 drives. Figure 3-6 shows the drive bay modules and the drive bay
numbering.
Figure 3-6 Drive Bay Modules and Drive Bay Numbering
Observe these drive population guidelines for optimum performance:
• When populating drives in a drive bay module, add drives in empty slots from left to right.
• If your server has two drive bay modules, populate all eight bays in module 1 before you populate
the module 2 bays.
• Keep an empty drive blanking tray in any unused slots to ensure proper airflow.
• You can mix hard drives and SSDs in the same server. However, you cannot configure a logical
volume (virtual drive) that contains a mix of hard drives and SSDs. When you create a logical
volume, it must contain all hard drives or all SSDs.
1 Drive bay module 1 2 Drive bay module 2
1 2
HDD13
HDD14
HDD15
HDD16
HDD9
HDD10
HDD11
HDD12
HDD5
HDD6
HDD7
HDD8
HDD1
HDD2
HDD3
HDD4
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