
Figure 6-5.  SAS Backplane Board Components: 2.5-inch  x8 Option
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 | back | 
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| 1 | drive 0 (SASDRV0) | 2 | drive 2 (SASDRV2) | 3 | drive 3 (SASDRV3) | 
| 4 | drive 5 (SASDRV5) | 5 | drive 6 (SASDRV5) | 6 | drive 7 (SASDRV4) | 
| 7 | drive 4 (SASDRV5) | 8 | drive 1 (SASDRV5) | 9 | optical drive power (CD_PWR) | 
| 10 | secondary SAS (SAS_B) | 11 | primary SAS (SAS_A) | 12 | backplane power (BP_PWR) |