IOS read diagnostic parameters
- Description:
- Advances in fiber optic technology allow enterprises to move to faster link speeds in their I/O
topology. But faster link speeds are more sensitive to optical signal degradation, as might occur
because of twisted or damaged cables, dirty optics, or improperly seated or misaligned connectors.
When link errors occur, it can be difficult to determine the source of the problem. For instance, is
it a transceiver, connector, or fiber issue, and at which point in the link?
The input/output supervisor (IOS) component of z/OS® now provides information to help clients and support personnel to diagnose and resolve issues with fibre channel links. The diagnostic information can help distinguish between errors that occur because of dirty connections and those that occur because of faulty optics.
With this support, IOS provides the following new functions:- A new LINKINFO parameter on the DISPLAY M=DEV command to display fiber optic link information, which eliminates the need to collect this information from individual channels, switches, and control units in a disruptive manner (such as by connecting a light meter)
- New health checks for IBM® Health Checker for z/OS to monitor mismatched link speeds for a control unit and inadequate buffer credits for the path
- SMF record type 124 subtype 1, which contains optical link information
- Release introduced:
- z/OS V2R1 with APAR OA49089 and supporting processor, DASD, and switch hardware
- Reference information:
