Lenovo ThinkStation P720 Hardware Maintenance Manual page 114

The storage drive in the front-access storage enclosure can be hot-swappable. When both of the following
requirements are met, you can remove or install the drive without even turning off your computer.
• The SATA cable of the front-access storage enclosure is connected to the eSATA connector on the
system board. To verify the cable connection, see "Preparing your computer and removing the computer
cover" on page 103 and "Parts on the system board" on page 38 for more information.
• The operating system of your computer does not reside on the storage drive installed in the front-access
storage enclosure.
Attention: If any of the above requirements are not met, do not remove or install the storage drive when the
computer is turned on. Otherwise, data on the storage drive might get damaged.
3.5-inch storage drive
To remove or install a 3.5-inch storage drive, do the following:
1. Before removing an old 3.5-inch storage drive, safely eject the old storage drive from the operating
system first. For more information, see the Windows help system.
2. Unlock the enclosure cover with the provided key as shown. Press the notch
cover.
Figure 16. Opening the front-access storage enclosure cover
3. Press the pit on the bracket cover, and then grasp the tilted cover to pull the bracket out of the front-
access storage enclosure.
Figure 17. Removing the bracket from the front-access storage enclosure
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P720 Hardware Maintenance Manual
a to open the enclosure