IBM RS6000 Service Guide - Page 162
Finding the Physical Location of a Device, Finding the Device When Service Aids Are Available,
View all IBM RS6000 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 162 highlights
Finding the Physical Location of a Device The physical location of a device (for example, a disk drive module or an SSA adapter) cannot be reported directly by the using system because of the way in which the SSA interface works. The address of an SSA device is related to the position of that device on the SSA loop. The address can, therefore, change if the configuration is changed. Finding the Device When Service Aids Are Available To help you to find the correct physical disk drive, the SSA service aids include an identify function. This function, when selected, causes the check light of the selected disk drive module to flash. For more details, see "SSA Service Aids" on page 3-64. Some devices (for example, adapters) do not have check lights. To find such a device, you can either use the identify function to identify devices that are next to the SSA adapter on the SSA link, or use the procedure described in "Finding the Device When No Service Aids Are Available." Finding the Device When No Service Aids Are Available When no service aids are available, you must find the device by using the port (P) and SSA-address (AA) values that are provided by some service request numbers (SRNs). Examples of these SRNs are 43nnn, 44nnn, and 45nnn, where nnn represents the PAA values. The port (P) value can be a number from 0 to 3, which indicates the port connector on the SSA adapter: 0 = Connector A1 1 = Connector A2 2 = Connector B1 3 = Connector B2 The AA value is the decimal SSA-address value. It indicates the position of the device that you are trying to find (counted along the SSA link). Use the port value to locate the relevant connector on the SSA adapter, then follow the SSA cable to the first disk drive module or adapter in the same SSA loop. Do not include dummy disk drive modules. 3-90 Service Guide