Fujitsu ETERNUS DX80 S2 Cli User's Manual page 417

Chapter 4 Function/System Settings and Display
4.2 Advanced Copy Management
Case.5. 2048MB of memory is assigned to one partition, and 1024MB of memory is assigned to six separate
partitions:
2,048MB
4.2.5.5 Assigning REC Disk Buffers
An REC disk buffer is used with REC buffer for REC Asynchronous Consistency when an REC buffer flood has
occurred. An REC disk buffer is made from four disks and is displayed as a RAID group of RAID1+0. However, it
is only used as an REC disk buffer. Up to 4 REC disk buffers can be assigned to one REC buffer.
The following figure shows how the REC disk buffer is used:
REC source storage
■
Summary of REC disk buffer settings through CLI
The steps involved in settings an REC disk buffer using CLI are as follows:
Procedure
1
Create REC disk buffer.
To create an REC disk buffer, choose four disks that do not belong to a RAID group by using the "create
rec-disk-buffer" command.
Then create a volume from this RAID group. This is a RAID group that can be displayed by using the
"show rec-disk-buffer" command.
2
Format REC disk buffer volume.
When an REC disk buffer is created, a volume is also created. This volume must be formatted by using
the "format rec-disk-buffer" command.
1024MB 1024MB
RA
Assign REC buffer for each
session.
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ETERNUS CLI User's Guide
Copyright 2015 FUJITSU LIMITED
1024MB 1024MB
Flood data is
cached to the
REC disk
buffer
REC destination storage
temporarily.
417
1024MB 1024MB
RA
P2X0-1030-09ENZ0