db2ACS_DB2ID is a set of data that can not be known at snapshot backup object creation time, but which must be maintained in the object repository.
/* ==========================================================================
* The PostObjectInfo is a set of data that can not be known at object
* creation time, but which must be maintained in the object repository. This
* is an optional field on the Verify() call, which may be NULL if there are
* no post-operation updates to be made.
* ========================================================================== */
typedef struct db2ACS_PostObjectInfo
{
/* The first active log will only be valid when creating a backup or
* snapshot object. It will indicate the file number and chain id of the
* first log required for recovery using this object.
* ----------------------------------------------------------------------- */
db2ACS_LogDetails firstActiveLog;
} db2ACS_PostObjectInfo;
db2ACS_LogDetails contains information that identifies a particular database log file.