A user RDAREA should not be placed on the same disk as a system log file. When this rule is observed, input/output operations on HiRDB files that constitute system log files and on user RDAREAs can be distributed to multiple disks when a synchronization point dump is collected, thereby reducing the amount of time required for synchronization point dump processing.
A user RDAREA should not be placed on the same disk as a system RDAREA.
If you have partitioned a table by row, place the RDAREAs storing the row-partitioned table on separate disks. Figure 9-8 shows an example of user RDAREA placement.
Figure 9-8 Example of user RDAREA placement (HiRDB/Single Server)