Acer Altos G5450 Series - Manual (Page 61)

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Installing an additional hard drive
The Altos G5450 HDD cage models supports both SATA2 and SAS hard
drives in different capacities.
Note: If you intend to install a SAS hard drive model, you first
need to install the add-on SAS controller card option. For related
instructions, go to page 60.
To install a hot-plug hard drive:
1 If necessary, unlock the front bezel, then pull it open.
2 Remove the HDD dummy cover from the cage.
3 Prepare the blank HDD carrier for installation.
(1) Remove the four screws that secures the blank frame.
You will use these screws to secure the hard disk later.
(2) Detach the plastic frame from the HDD carrier.