An IPL after a system crash

If the operator does not enter the CLPA or CVIO system parameters, the operator can "warm start" the system after a system crash. Existing journaled VIO data set pages and PLPA pages are retained. The specified parmlib parameter list (IEASYSxx) cannot include the CVIO or CLPA system parameters. (The specification of one or more IEASYSxx members by the operator at IPL time is described in the next topic, Operator entry of parameters.)

Any definitions of existing page data sets as non-VIO local page data sets are preserved. Also the operator can define a local page data set that previously was used for VIO paging as a non-VIO local page data set. During system operation, the VIO pages on the newly designated non-VIO local page data set will migrate to any local page data set used for VIO paging. An installation can remove a local page data set that was designated on the previous IPL as a non-VIO local paging data set. Removing a local page data set before a "warm start" requires that the local page data set contain no VIO pages. If the local page data set contains VIO pages, the system changes the "warm start" into a "quick start". A local page data set specified as NONVIO can contain VIO pages if one of the following conditions exists:

Directed VIO was turned off while the previous system was active.
A warning message to the operator indicated that VIO pages spilled to a non-VIO data set because no more space was available on those page data sets that were being used for VIO.

For more information about designating non-VIO page data sets, see the NONVIO system parameter in IEASYSxx (system parameter list).