Fujitsu Eternus DX410 S2, Cli User'S Manual

Page: 379 / 756

Chapter 4 Function/System Settings and Display
4.2 Advanced Copy Management
ETERNUS CLI User’s Guide
Copyright 2015 FUJITSU LIMITED P2X0-1030-09ENZ0
379
4.2.1 Outline
is a function that, to the server, appears to copy a volume (the copy source) in an ETERNUS DX Disk
storage system to a different volume (the copy destination) in the same ETERNUS DX Disk storage system at a
specific point in time. Only a logical copy is performed initially, following which the records
changes as the data is updated.
Access to changed areas is then referenced via the record, while access to the unchanged areas is
transparently passed back to the original data (in the copy source area).
The expected amount of updates must be considered when deciding the size of the copy destination area.
By its nature, is best used for the temporary backup to tape of file server files and other low
modification rate data, as provision against operating failures and software errors.
4.2.2 Preparations for the Advanced Copy Function
4.2.2.1 Basic Settings
■ License registration
Register a license for using the Advanced Copy function.
If a license is not registered, the Advanced Copy function cannot be used.
[Example]
Registering a license key "1928569802345721"
■ License registration status check
Check the status of the Advanced Copy license registration.
[Example]
Allows generational
management of data
updates (providing
diff history information)
In actually, only the
changes to original data
are copied and kept
Seen by server to have
the same capacity as
the original volume
CLI> set advanced-copy-license -key 1928569802345721
CLI> show advanced-copy-license