HP StorageWorks MSA 2/8 HP StorageWorks Fabric OS V3.1.x/4.1.x Reference Guide - Page 778

Fabric OS Commands where: >>> is a cable or internal loopback -> is a routing table entry The connections between pairs of M->M ports are chosen to exercise the connections between as many ASICs as possible subject to the availability of pairs of M->M ports. In mode 1 with SPLB mode disabled the spinsilk command only circulates frames within each single port and none of the ASIC to ASIC connections are tested. This mode should only be used for fault isolation. ■ 2 for external loopback mode. The external loopback test creates a test loop between two ports on different ASICs and also tests the Serializer Deserializer functionality. ■ 5 for internal loopback mode. The internal loopback test creates a test loop between two ports on a single ASIC. See the setSplbmode command for more information on how the loopback mode setting changes the execution of this command. GBIC/SFP Mode (sfpmode): V3.1.x If the spinSilk command is executed with SFP mode activated, only ports containing SFPs are tested. To activate SFP mode, execute the following command prior to executing the spinSilk command: switch:admin> setgbicmode 1 The state of the SFP mode is saved in non-volatile memory and remains active over a reboot until it is disabled as follows: switch:admin> setgbicmode 0 An example mode of operation would be to disable the switch, set the SFP mode to 1, and execute spinsilk which would limit its testing to ports which are using SFPs, and all SFP ports that are properly cable loopbacked. Because this test includes the SFPs and the fiber cable in its test path, use the results from this test in conjunction with the results of the portloopbacktest can be used to determine those switch components that are not functioning properly. 778 Fabric OS Version 3.1.x/4.1.x Reference Guide