Fujitsu ETERNUS DX100 S3 Setup Manual page 59

Chapter 4 Configuration Settings for RAID Groups or Thin Provisioning
4.4 When Using Thin Provisioning Volumes (TPVs)
Requirements for selecting drives
• The conditions for RAID groups in the TPP are as follows:
- The RAID level (High Performance (RAID1+0) / High Capacity (RAID5) / High Reliability (RAID6) /
Mirroring (RAID1) / Striping (RAID0)) must be the same
- The number of member drives in the RAID group must be the same
- The drive type (Online/Nearline/SSD/SED) must be the same
(Only using "Online" drives or only using "Nearline" drives is recommended because the available
capacity and the access performance may be reduced when "Online" and "Nearline" are used together.)
• The recommended drive configuration of the RAID group is shown as follows:
- 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 is not 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.
- Select SSDs with the same type (SSD-M/SSD). If SSDs of different types exist in a RAID group, access per-
formance of the RAID group may be affected.
- When "High Performance (RAID1+0) " or "Mirroring (RAID1)" is selected for the RAID level, locate the
drives (mirroring pair drives) divided into two or more lines (for the ETERNUS DX500 S3/DX600 S3).
- When "High Capacity (RAID5)" or "High Reliability (RAID6)" is selected for the RAID level, locate the
drives (striping multiple drives) divided into two or more lines (for the ETERNUS DX500 S3/DX600 S3).
The procedure to create a TPP by selecting drives manually is as follows:
Procedure
1
Click [Create] in [Action].
 The [Create Thin Provisioning Pool] screen appears.
FUJITSU Storage ETERNUS DX Configuration Guide (Web GUI)
Copyright 2014 FUJITSU LIMITED
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