Lenovo ThinkStation P310 Hardware Maintenance Manual page 130

Installing or replacing a hard disk drive in the optical/storage combination enclosure
To install or replace a hard disk drive in the optical/storage combination enclosure, do the following:
1. Slide the enclosure out of the chassis. See "Installing or replacing an optical drive" on page 109.
2. Pinch the two clips toward each other as shown to open the rear cover of the enclosure.
Figure 68. Opening the enclosure from the rear
3. If you are replacing an old hard disk drive, do the following:
a. Slide the hard disk drive out of the rear of the enclosure.
Figure 69. Removing the hard disk drive from the rear
b. Flex two sides of the blue bracket to remove the hard disk drive from the bracket.
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ThinkStation P310 Hardware Maintenance Manual