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Features and Benefits of HSG80 ACS 8.6P Data Replication Manager
7
Zoning—Zoning allows a switched fabric to be partitioned into multiple zones. It limits a
controller to a specified zone or zones and limits the number of controllers a server can see. This
feature increases the number of servers allowed per SAN and enables the administrator to
dedicate a zone for a specific function such as backup. This feature also allows the consolidation
of local area SANs into one larger wide area SAN and, therefore, sharing of the storage
infrastructure.
Clone and snapshot—SANworks DRM supports cloning of RAID 0, RAID 1, and RAID 0+1
storagesets at either the initiator or target site. A clone is a physical point-in-time copy of the
data. DRM also supports the creation of snapshot copies of any storageset at the target site. A
snapshot is a virtual point-in-time copy of the data. Clone and snapshot are functions that
minimize the downtime required for system backups and data migration activities. These
capabilities ensure business continuance by allowing parallel processing and are designed for
customers who cannot disrupt their computing operations for management activities.
Non remote copy set—Logical storage units that are created on a storage array and are not part
of a remote copy set are referred to as a non remote copy set storage. Remote copy sets and non
remote copy sets are logical storage units that can exist on the same subsystem at both the
initiator and target sites. This provides added LUN support and configuration flexibility. Non
remote copy sets may be different at the initiator and target sites. Also, the creation of non remote
copy sets maximizes the use of existing infrastructure and supports snapshot or cloning
operations.
Bootless failover of data (noncluster quorum, nonsystem disks) for Tru64, OpenVMS, and
Windows 2000—At failover initiation, the bootless failover and failback procedures allow the
surviving server to dynamically recognize the new LUNs (failed over remote copy sets,
snapshots, or clones) without rebooting the server.
Wavelength Division Multiplexing and Dense Wavelength Division Multiplexing
technology—DRM supports WDM and Dense Wavelength Division Multiplexing (DWDM)
optical networks. These network connections provide multiple high bandwidth connectivity of
enterprise-level SANs over a metropolitan area network (MAN) through private or public fiber
optic networks. The use of WDM-based technology allows the intersite infrastructure to expand
without investment in new cable. For example, the existing fiber may support only a single
intersite link, but adding WDM at each site allows the same cable to be used for dual Fibre
Channel links in addition to the WAN connection between those same sites.
High availability with no single point of failure—DRM configurations ensure highly available
data to host applications by having no single point of failure (NSPOF) in their hardware and
software components. Dual host bus adapters (HBAs), Fibre Channel links, switches, and storage
subsystems provide redundancy in hardware components. Secure Path software or similar
multipath driver support in the operating system provides HBA-failover support from server to
storage, which provides system redundancy from a software perspective. SANworks Secure Path
supports AIX, NetWare, Solaris, Windows 2000, and Windows NT operating systems. Secure
Path is not needed for OpenVMS and Tru64 because multipath failover is supplied with these
operating systems.
Active/active bi-directional—The bi-directional DRM solution addresses the growing need to
ensure continuous availability of applications that are critical to daily business operations. DRM
is the first storage solution to enable two sites connected by switched Fibre Channel to use each
other to maintain synchronized copies of online data, maximizing resource utilization while
enabling business continuance, even in the event of disaster.
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