Failsafe States; Full Copy Mode; Home - HP 418800-B21 - StorageWorks Modular Smart Array 70 Storage Enclosure User Manual

• When any virtual disk in the DR group pair becomes unavailable, host writes, logging, and
remote replication are stopped.
• Disabled
• While all components in the DR group pair function normally, host writes, logging, and
remote replication continue normally.
• If any remote copy (virtual disk) in the DR group pair becomes unavailable, all host writes
to the source DR group and logging continue, but remote replication to the destination DR
group is automatically stoped. Host writes are stored in the source DR group log until remote
replication is re-established.
• If a source virtual disk becomes unavailable, host writes to the virtual disk are automatically
stopped. Remote replication to the remote copy is also automatically stopped. Host writes,
logging, and remote replication to other virtual disks in the source and destination DR groups
continue normally.
Default setting and user control
When you create a DR group pair, you can choose to initially enable or disable the feature. The setting
can be changed after the DR group pair is created.
In some older versions of storage management software, failsafe on unavailable member is called failsafe
mode. See also

Failsafe states

The failsafe state for a DR group pair indicates the state of host I/O, logging, and remote replication
functions. Values are:
• Locked. A locked failsafe state for a DR group pair indicates that host writes, logging, and remote
replication have been automatically stopped due to a problem.
• Unlocked. An unlocked failsafe state for a DR group pair indicates that host writes, logging,
and remote replication are occurring normally.
Failsafe states are related to settings for
failsafe on unavailable

Full copy mode

Full copy mode is when data in a DR group pair is copied directly from the source group virtual disk to the
destination group, without using any data in the log disk. Typically, this is an automatic event that happens
when remote replication is resumed and the DR group log disk is full. See
Force full copy
In a forced full copy:
• All virtual disks in the source DR group are copied; you cannot copy individual disks.
• All host write-transactions in the DR group log are deleted.
Even when supported by the controller software, the force full copy feature is not available if conditions in
the DR group pair are not appropriate.
Controller software versions
Implementation of this feature is controller software dependent. See
controller software features - remote

Home

When designated as home, the DR group is the preferred source in the DR group pair. Values are:
102 DR Groups
failsafe states, remote replication guidelines
member.
replication.
and failsafe on
failsafe on link-down/power-up
link-down/power-up.
and
default maximum log size.