Lenovo System x3500 M4 Installation And Service Manual page 226

Drive bay 7-0
Drive bay 15-8
Drive bay 23-16
Drive bay 31-24
Figure 125. Install cage in drive bay 16-23
b. Fasten the four screws.
Step 5. Install the 2.5-inch hot-swap hard disk drive backplane (see "Installing the 2.5-inch hard disk drive
backplane" on page 246).
Figure 126. Install backplane for bay 8-15 and 16-23
Step 6. Install the EMC shields that come with the option.
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System x3500 M4 Installation and Service Guide
2.5-inch hard disk drive cage
(installed by default)
2.5-inch hard disk drive cage
that comes with the option
upgrade kit
Install backplane for drive bay 8-15
when you are upgrading the number
of 2.5-inch hard disk drives to 16
Install backplane for drive bay 16-23
when you are upgrading the number
of 2.5-inch hard disk drives to 24