HP XP7 Storage - Manual (Page 191)

OFF. Protection mode is enabled for the host that has Data Retention and ON command
device.
Examples for configuration and protected volumes
Case (1): Two Hosts ( Figure 60 (page 191) ). In protect mode Ora2 are rejected to operate the
paired volume, because of Unknown for Grp4 on HOST2.
Case (2): One Host ( Figure 61 (page 191) ). In protect mode Ora1 and Ora2 are rejected to operate
the paired volume, because of Unknown for Grp2 and Grp4 on HOST1. If HOST1 has a protection
OFF command device, then Ora1 and Ora2 are permitted to operate the paired volume.
NOTE: The Data Protection Facility is implemented by only RAID Manager. RAID Manager needs
to know the protection attribute for the command device whether should be permitted the operation
for paired volume. If HORCM has protection ON command device at its time, then HORCM checks
a permission for a paired volume.
Figure 60 Example for the two-host configuration
Figure 61 Example for the one-host configuration
Data Protection facility 191