Fujitsu ETERNUS DX60 S3 User Manual page 563

Chapter 6 Thin Provisioning Pool Management
6.2 Create Thin Provisioning Pool
■ Manually selecting drives to create Thin Provisioning Pool
To create a new TPP manually, select Drive Type, RAID Level, and the drive that configures the TPP.
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) / High
Reliability (RAID6-FR) / 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/Online SED/Nearline SED/SSD SED) must be the same
(If "Online" is selected for the drive type, "Online" type drives and "Nearline" type drives can be used in
the same RAID group. However, using only "Online" type drives is recommended. If "Online SED" is
selected for the drive type, "Online SED" type drives and "Nearline SED" type drives can be used in the
same RAID group. However, using only "Online SED" type drives is recommended. This is because the
available capacity and the access performance may be reduced when these drives are used in the same
RAID group.)
- When the RAID level is "High Performance (RAID1+0)" or "High Capacity (RAID5)", the drive must be
smaller than 6TB (except SSDs and SSD SEDs)
• 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.
- SSD types vary depending on the interface speed (bandwidth). When manually specifying SSDs to be
used, it is recommended to select SSDs with the same type (SSD-M/SSD/SSD-M SED). If SSDs of different
types exist in a RAID group, access performance of the RAID group may be affected.
- If the host connection environment does not support Advanced Format (AF), select non-AF-compliant
drives (*1). If AF-compliant drives (*2) are selected, a data format conversion occurs and the drive
access performance is reduced. When the host to be connected supports AF, both AF-compliant and
non-AF-compliant drives can be selected.
*1: Drives (such as 2.5" Online, 2.5" Nearline) where "AF" is not displayed for the type.
*2: Drives (such as 2.5" Online AF, 2.5" Nearline AF) where "AF" is displayed for the type.
- When "High Performance (RAID1+0)" or "Mirroring (RAID1)" is selected for the RAID level, allocate the
drives (mirroring pair drives) by dividing them into two or more connection lines (for the ETERNUS
DX500 S3/DX600 S3).
- When "High Capacity (RAID5)", "High Reliability (RAID6)", or "High Reliability (RAID6-FR)" is selected for
the RAID level, allocate the drives (multiple drives configuring a striping) by dividing them into two or
more connection lines (for the ETERNUS DX500 S3/DX600 S3).
• There are conditions for the ETERNUS DX8700 S3/DX8900 S3 drive layout. Refer to
ETERNUS DX8700 S3/DX8900 S3 drive layout" (page 528)
level is "Mirroring (RAID1)", "High Performance (RAID1+0)", "High Capacity (RAID5)", "High Reliability
(RAID6)", and "High Reliability (RAID6-FR)".
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ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
"Conditions for the
for details. These conditions apply when the RAID
P2X0-1270-13ENZ0