Raid Migration - Fujitsu Eternus DX60 User Manual

Chapter 1 Overview
> 1.3 Functions
• SnapOPC+
As updates occur in the source data, SnapOPC+ saves the pre-change for each affected
generation level. Registering standby storage areas in the SDP allows SnapOPC+ copy
sessions to continue even when the amount of update data exceeds the copy destination
capacity.
SnapOPC+ is suitable for the following usages.
-
-
• EC (Equivalent Copy)
EC makes a mirror copy of the copy source to the copy destination beforehand, then
suspends the copy and treats all data as independent data.
When copying is Resumed, only updated data in the copy source is copied to the copy
destination. If the copy destination data has been changed, copy the copy source data again.
EC is suitable for the following usages.
-
-
Purchasing the (optional) Advanced Copy Feature allows full use of all the Advanced Copy func-
tions.
Table 1.8
Table 1.8
Maximum number of
copy sessions
Controlling software
Available copy type
1.3.4

RAID Migration

RAID migration is a function that transfers a volume to a different RAID group with the data
integrity being guaranteed. By using RAID migration, RAID levels and volumes can be hot
switched. This allows easy redistribution of volumes among RAID groups in response to
customer needs. RAID migration can be carried out while the system is running, and may also be
used to switch data to a different RAID level changing from RAID5 to RAID1+0, for example.
P3AM-3042-03ENZ0 ETERNUS DX60/DX80 Disk storage system User Guide
Making temporary backup for tape backup
Backup for less updated data (generation management is available)
Making backup
Making system test data replication
shows the various functions that are available.
Available copy functions
Item Without Advanced Copy
GUI
CLI
SnapOPC+
8
GUI
VSS
CLI
SnapOPC+ SnapOPC+
QuickOPC
37
With Advanced Copy
512 (ETERNUS DX60)
1024 (ETERNUS DX80)
ETERNUS SF
VSS AdvancedCopy
Manager
SnapOPC+ All copy types
QuickOPC
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