If you are looking at the NAJ-1501 manual for a specific repair, you are likely performing one of these three actions:
Connect both power supply units (PSUs) to separate power circuits for redundancy. Netapp Naj-1501 Manual
Power on the expansion shelves first. Wait two minutes for the drives to spin up completely. Power on the main controller head last to ensure proper topology discovery. Hardware Interface and LED Diagnostics If you are looking at the NAJ-1501 manual
Look for high counts of Invalid Dword , Running Disparity Error , or Loss of DWORD Sync , which generally indicate a degraded physical cable or a failing port connector that requires immediate replacement. Power on the main controller head last to
The NAJ-1501 is not a single, static product but a assigned to a family of disk drive shelves known for their reliability and performance.
Connect your management network to the port (Service Processor) on both controllers.