If you execute the pdcopy command in updatable mode, you must place the RDAREA to be backed up on backup-hold (-b u or -b wu).

Table 7-3 lists and describes the four types of backup-hold.

Table 7-3 Types of backup-hold

Backup-hold type	Explanation
Referencing-permitted backup-hold	During backup-hold, RDAREAs that have been backed up and held can be referenced; an updating attempt will result in an SQL error (-920).
Referencing-permitted backup-hold (update WAIT mode)	During backup-hold, RDAREAs that have been backed up and held can be referenced; an updating attempt goes onto lock-release wait status until the backup-hold is released.
Updatable backup-hold	During backup-hold, RDAREAs that have been backed up and held can be referenced and updated. Even while an updating transaction is being executed, an RDAREA is placed immediately on updatable backup-hold status without placing the pdhold command on wait status.
Updatable backup-hold (WAIT mode)	During backup hold, RDAREAs that have been backed up and held can be referenced and updated. If an updating transaction is being executed, the pdhold command is kept waiting until the transaction terminates.

For details about how to make a backup using the backup shutdown, see the HiRDB Version 8 System Operation Guide.

Reference note

Reference-possible backup hold and reference-possible backup hold (update WAIT mode) are also referred to as committing a database.