![](/images/new-backgrounds/1193999/193999261x1.webp)
Figure 5-3. Back View of the Backplane
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| 5 | 6 | 7 |
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| 13 | 12 | 11 | 10 | 9 |
1 | system fan board connector | 2 | backplane power connector for | ||
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| power supply 1 |
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3 | SGPIO connector for system board 4 | 4 | SGPIO connector for system board 3 | ||
5 | SGPIO connector for system board 2 | 6 | CPLD JTAG connector |
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7 | SGPIO connector for system board 1 | 8 | backplane jumper |
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9SATA2 hard drive connectors 1, 2, and 3 for system board 1 (from top to bottom)
11SATA2 hard drive connectors 1, 2, and 3 for system board 3 (from top to bottom)
13backplane power connector for power supply 2
10SATA2 hard drive connectors 1, 2, and 3 for system board 2 (from top to bottom)
12SATA2 hard drive connectors 1, 2, and 3 for system board 4 (from top to bottom)
Jumpers and Connectors