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Chapter 9. Configuration planning 185
Minimal host application outages.
The disadvantages of remote copy technologies are:
The same storage device types are required. For example, in a Metro Mirror configuration
you need ESS 800 mirroring to a DS8000 (or an IBM approved configuration), but cannot
have a non-IBM disk system mirroring to a DS8000.
Physical volume ID (PVID) and device name are not maintained if not under LVM.
9.5.5 Migration services and appliances
The following IBM migration services and appliances are available:
IBM Piper Services Offering
IBM SAN Volume Controller
These data migration services and appliances provide smooth, risk-averse data migration to
your DS8000. The advantages of these migration methods are:
Facilitated by custom migration tools.
Minimal customer involvement by IT staff, except planning.
Minimal disruption or outages to IT operations.
Online migrations can occur while continuing IT operations.
Tunable migration rate to eliminate impact to applications.
Transparent to application servers.
High throughput tool minimizes migration duration.
Delivered by team experienced with many migrations.
Maintains data integrity during migration.
Can fall back to the original data and storage device.
Large number of operating systems and storage systems supported.
The disadvantages of migration appliances are:
Cost of migration appliance or service.
Application disruption to install and remove appliance.
See Appendix C, “Service and support offerings” on page 407 for storage services offerings.
9.5.6 z/OS data migration methods
Figure 9-15 on page 186 lists a number of data migration methods available to migrate data
from existing disk systems to the DS8000 in a zSeries environment.