Dell SC180 Owner's Manual page 26

Figure 17. Opening the Drawer
1. Drawer latches (2 per drawer)
CAUTION: If the SC180 operates for too long (depending on altitude) with drive drawers
open, the enclosure can overheat. Overheating can cause potential drive failure and data loss
and could invalidate the warranty.
3. Using the lit LED, find the failed DDIC.
4. Press the release button to unlatch the DDIC.
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2. Drawer (2 per chassis)
Replacing SC180 Expansion Enclosure Components