IBM Storwize V7000 Unified Problem Determination Manual page 248

To replace the drive assembly or blank carrier, perform the following steps:
Procedure
1. Read the safety information to which "Preparing to remove and replace parts"
on page 210 refers.
2. Unlock the assembly by squeezing together the tabs on the side.
Figure 47. Unlocking the 3.5" drive
3. Open the handle to the full extension.
Figure 48. Removing the 3.5" drive
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Storwize V7000 Unified: Problem Determination Guide 2073-720