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Chapter 7 Thin Provisioning Pool Management
7.2 Functions in the Action Area for Thin Provisioning
■
Manually selecting drives to create Thin Provisioning Pool
To create a new TPP manually, input Disk Type, RAID Type, and select the drive that configures
the TPP.
The number of member drives in each RAID group
The number of member drives for each RAID type is listed in the following table.
High Performance (RAID1+0)
High Capacity (RAID5)
High Reliability (RAID6)
Mirroring (RAID1)
Striping (RAID0)
RAID Type
Number of member drives
4, 8, 16, 24
4, 5, 8, 9, 13
6, 8, 10
2
4
•
The conditions for RAID groups in the TPP are as follows:
-
The RAID level (RAID1+0/RAID5/RAID6/RAID1/RAID0) must be the
same
-
The number of member drives in the RAID group must be the same
-
The drive type (Online/Nearline/SSD) must be the same
(When "Online" is selected for "Disk Type", three types of RAID
group can be registered in the TPP. The three available types are a
RAID group that is configured with "Online" disks, a RAID group that
is configured with "Nearline" disks, and a RAID group that is config-
ured with both "Online" disks and Nearline" disks. In this case, regis-
tering RAID groups that are only configured with "Online" disks is
recommended to prevent any reduction of TPP access perfor-
mance.)
•
The following shows the recommended drive configuration of the RAID
group:
-
Select drives with the same capacity. If drives of different capacities
exist in a RAID group, the smallest drive 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.
-
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.
-
When "RAID1+0" or "RAID1" is selected for the RAID level, locate
the drives (mirroring pair drives) divided into different lines (for
ETERNUS DX410 S2/DX440 S2).
-
When "RAID5" or "RAID6" is selected for the RAID level, locate the
drives (striping multiple drives) divided into two or more lines (for
ETERNUS DX410 S2/DX440 S2).
148
ETERNUS Web GUI User's Guide
Copyright 2011 FUJITSU LIMITED
P2X0-1090-02ENZ0
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