Compaq ProLiant 1000 User Guide: Online Storage Controller Recovery Option - Page 63

Cross Connection

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5-2 Configuration Errors to Avoid It is important to understand that the Online Storage Controller Recovery Utility detects cabling errors when the Verify function is used to test all OSCRO controller pairs. If you are having a problem, run the Verify function. Cross Connection In the example shown in Figure 5-1, the cables are cross connected, that is, the external connector from the active SMART-2 controller is attached to the same ProLiant Storage System/F or /U as the internal connector of the standby SMART-2 controller. The Online Storage Controller Recovery Utility may not detect this error, and it may not manifest any problems until the switch occurs from the active controller to the standby controller. When the active controller fails with the cables this way, the system will not be able to locate the disks because their logical SCSI port numbers will change.

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5-2
Configuration Errors to Avoid
It is important to understand that the Online Storage Controller Recovery
Utility detects cabling errors when the
Verify
function is used to test all OSCRO
controller pairs.
If you are having a problem, run the
Verify
function.
Cross Connection
In the example shown in Figure 5-1, the cables are cross connected, that is, the
external connector from the active SMART-2 controller is attached to the same
ProLiant Storage System/F or /U as the internal connector of the standby
SMART-2 controller. The Online Storage Controller Recovery Utility may not
detect this error, and it may not manifest any problems until the switch occurs
from the active controller to the standby controller. When the active controller
fails with the cables this way, the system will not be able to locate the disks
because their logical SCSI port numbers will change.