Western Digital Ultrastar ScaleUp SE4U102 User Manual page 273

4. Management
User Guide
4.9 Partially Populated Enclosures
Figure 255: Inserting a 3.5in HDD Assembly
Step 6 : Lower the drive until the spring-loaded posts on the carrier contact the top edges of the drive
slot. This is an intermediate position; the drive assembly will be fully seated later on.
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