LCS group devices

The LCS device driver requires two I/O subchannels for each LCS interface, a read subchannel and a write subchannel. The corresponding bus IDs must be configured for control unit type 3088.

Figure 1. I/O subchannel interface
This graphic shows a network interface mapping to a device for the LCS device driver. Two subchannels connect this device to an OSA-Express adapter.

The device bus-IDs that correspond to the subchannel pair are grouped as one LCS group device. The following rules apply for the device bus-IDs:

read
must be even.
write
must be the device bus-ID of the read subchannel plus one.