IBM DS8900F, Введение и руководство по планированию, Страница: 60 / 172

Figure 4. Remote Pair FlashCopy
Note: The storage system supports Incremental FlashCopy and Metro Global Mirror Incremental Resync
on the same volume.
Safeguarded Copy
The Safeguarded Copy feature creates safeguarded backups that are not accessible by the host system
and protects these backups from corruption that can occur in the production environment. You can define
a Safeguarded Copy schedule to create multiple backups on a regular basis, such as hourly or daily. You
can also restore a backup to the source volume or to a different volume. A backup contains the same
metadata as the safeguarded source volume.
Safeguarded Copy can create backups with more frequency and capacity in comparison to FlashCopy
volumes. The creation of safeguarded backups also impacts performance less than the multiple target
volumes that are created by FlashCopy.
With backups that are outside of the production environment, you can use the backups to restore your
environment back to a specified point in time. You can also extract and restore specific data from the
backup or use the backup to diagnose production issues.
You cannot delete a safeguarded source volume before the safeguarded backups are deleted. The
maximum size of a backup is 16 TB.
Copy Services Manager (available on the Hardware Management Console) is required to facilitate the use
and management of Safeguarded Copy functions.
Remote mirror and copy
The remote mirror and copy feature is a flexible data mirroring technology that allows replication between
a source volume and a target volume on one or two disk storage systems. You can also issue remote
mirror and copy operations to a group of source volumes on one logical subsystem (LSS) and a group of
target volumes on another LSS. (An LSS is a logical grouping of up to 256 logical volumes for which the
volumes must have the same disk format, either count key data or fixed block.)
Remote mirror and copy is an optional feature that provides data backup and disaster recovery.
Note: You must use Fibre Channel host adapters with remote mirror and copy functions. To see a current
list of environments, configurations, networks, and products that support remote mirror and copy
functions, click Interoperability Matrix at the following location IBM System Storage Interoperation
Center (SSIC) website (www.ibm.com/systems/support/storage/config/ssic).
46 IBM DS8900F: DS8900F Introduction and Planning Guide