Service
Backplane Assembly
Figure 38. SCSI Bus Reset Switch Default SettingsService
Table 23. SCSI Bus Reset Switch Functions
| Switch 1: | Switch 2: | Switch 3: | Switch 4: |
| Bus B | Bus B | Bus A | Bus A |
| Power Detect | Module Detect | Power Detect | Module Detect |
|
|
|
|
|
Switch | SCSI bus B is reset if | SCSI bus B is reset if | SCSI bus A is reset if | SCSI bus A is reset if |
Enabled | one of these events | a storage module is | one of these events | a storage module is |
(Up, Default): | occurs: | inserted or removed. | occurs: | inserted or removed. |
| ∙ The power switch is |
| ∙ The power switch is |
|
| cycled. |
| cycled. |
|
| ∙ Both power cords |
| ∙ Both power cords |
|
| are unplugged. |
| are unplugged. |
|
| ∙ The input voltage |
| ∙ The input voltage |
|
| limits are exceeded on |
| limits are exceeded on |
|
| both power supplies. |
| both power supplies. |
|
| ∙ Both power supplies |
| ∙ Both power supplies |
|
| shut down. |
| shut down. |
|
|
|
|
|
|
Switch | SCSI bus B is not | SCSI bus B is not | SCSI bus A is not | SCSI bus A is not |
Disabled | reset if one of the | reset if a storage | reset if one of the | reset if a storage |
(Down): | above events occurs. | module is inserted or | above events occurs. | module is inserted or |
|
| removed. |
| removed. |
|
|
|
|
|
102