The following table lists the points to consider when designing paired volumes that store update-copy target files.

Table 2-6 Points to consider when designing paired volumes

Item	Points to consider
Association with HiRDB file system areas	Allocate a single paired volume to each HiRDB file system area (do not use LVM to create a single logical volume (LV) from multiple paired volumes and store HiRDB file system areas on that LV).
Capacity	The capacity of a paired volume must be equal to or greater than the capacity of the associated HiRDB file system area.
Total count	Number of HiRDB file system areas to be update-copied + reserve count

Note

HiRDB does not check whether these conditions are satisfied. If these conditions are not satisfied, correct operation of HiRDB cannot be guaranteed.