Chapter 8 Advanced Copy Management
8.2 Functions in the Action Area for Advanced Copy
ETERNUS Web GUI User’s Guide
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Copyright 2011 FUJITSU LIMITED
P2X0-1090-02ENZ0
Requirements for Drive Selection
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The requirements for a RAID group that is to be used as a REC Disk Buffer are as follows:
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The number of member drives is four or eight
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Different drive types are not selected at the same time
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The following shows the recommended drive configuration of the RAID group:
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Select drives with the same capacity. If drives of different capacities exist in a RAID group,
the smallest becomes the standard, and all other drives are regarded as the same
capacity as the smallest drive. In this case, the remaining drive space will NOT be used.
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Select drives with the same speed. If drives of different speed exist in a RAID group,
access performance of the RAID group may be affected.
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Dividing the mirroring pair drives into different lines (for ETERNUS DX410 S2/DX440 S2)
The procedure to create a REC Disk Buffer is as follows:
Procedure
1
Click [Create REC Disk Buffer] in [Action].
2
Specify the REC Disk Buffer detailed information, and click the [Create] button.
•
Name
Input a RAID group name to be created.
The following input conditions apply:
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1 - 16 alphanumeric characters and symbols (except ", (comma)" and "?")
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Space
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Registering the license for the Advanced Copy feature is required to
create a REC Disk Buffer.
•
The RAID levels, which can be used in REC Disk Buffer, are RAID1+0
(2+2) and RAID1+0 (4+4).
•
When encryption mode is disabled, an encrypted REC Disk Buffer
cannot be created by CM.
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In the following conditions, REC Disk Buffers cannot be created;
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When Online and SSDs are combined in a single REC Disk Buffer
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When resources for creating a REC Disk Buffer (such as the number
of RAID groups and volume numbers) are insufficient
(When the maximum number of RAID groups or volumes is already
registered in the ETERNUS DX Disk storage system, a new REC
Disk Buffer cannot be created.)
•
When the REC Disk Buffer creation process is complete, the REC Disk
Buffer will be formatted automatically.
•
When assigning multiple REC Disk Buffers to a REC Buffer, each REC
Buffer has different conditions. Refer to
"8.2.16 Assign REC Disk Buffer"
for details.
