Table 91. Comparison of data migration options (continued)
Type Example Advantages Disadvantages
UNIX or
Windows
Commands
cpio, cplv, dd, tar, backup
restore; copy, scopy,
xcopy, drag and drop
Common, easy to
use, tested
Length of service
interruption varies;
scripting prone to
errors and more
testing
Remote Copy Synchronous Mirror
(Metro Mirror);
Asynchronous Mirroring
(Global Mirror and
Global Copy)
Operating system
independent
Like storage device
types needed
Third-party
software
packages
Data Migration (XoSoft);
Backup /Restore (Tivoli
®
,
Legato, Veritas)
Some have little
application service
interruption,
standard utilities
Cost of software;
some have high
application service
interruption
Third-party
migration
appliances
IBM SAN Volume
Controller, DataCore
SANsymphony
Multiple
heterogeneous
storage venders
supported; migration
cycles that are
offloaded to
appliance
Cost of migration
appliance / service,
application
disruption to install
/ remove appliance
Chapter 8. Data migration 181
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