Lenovo 5041A2U User Manual page 19

Figure 5. Drive bay locations
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Bay 1 - Optical drive bay (with an optical drive installed)
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Bay 2 - Slim card reader drive bay
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Bay 3 - Primary SATA hard disk drive bay (with a 3.5-inch SATA hard disk drive installed)
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Bay 4 - Secondary SATA hard disk drive bay
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Chapter 1 Product overview
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