Appendix A Parameter List
A.6 Thin Provisioning Management
ETERNUS Web GUI User’s Guide (Settings)
Copyright 2015 FUJITSU LIMITED
P2X0-1270-13ENZ0
928
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Advanced Setting
Stripe Depth should be set only when advanced tuning needs to be performed for each RAID group
configuring the TPP. It is not necessary to change the default value for normal use.
Specifying a larger value for the Stripe Depth can reduce the number of drives to access. For "High
Performance (RAID1+0)", reducing the number of commands issued to drives improves the performance of
access to the specified RAID group. For "High Capacity (RAID5)", however, specifying a larger value for the
Stripe Depth might decrease the sequential write performance. In addition, several restrictions apply to a
RAID group whose Stripe Depth has been changed. Refer to
"Restrictions for Stripe Depth modification (for
for details.
•
Stripe Depth
Available Stripe Depth value (for TPP)
The following table shows the available Stripe Depth value for each RAID level.
Description
Select the Stripe Depth of the RAID group that is to be created.
The setting is not available when the RAID level is "Mirroring (RAID1)". When the RAID
level is "High Reliability (RAID6)", the value is fixed to "64KB". Available Stripe Depth
value vary depending on the RAID level. Refer to
"Available Stripe Depth value (for TPP)"
for details.
Input condition/
Display contents
•
64 KB
•
128 KB
•
256 KB
•
512 KB
•
1024 KB
RAID level
Drive configuration (*1)
Available Stripe Depth value
Mirroring (RAID1)
1D+1M
–
High Performance (RAID1+0)
Any
64KB, 128KB, 256KB, 512KB, 1024KB
Striping (RAID0)
High Capacity (RAID5)
3D+1P
64 KB, 128 KB, 256 KB, 512 KB
4D+1P, 7D+1P
64 KB, 128 KB, 256 KB
8D+1P, 12D+1P
64 KB, 128 KB
High Reliability (RAID6)
Any
64 KB
High Reliability (RAID6-FR)
Any
64 KB
Summary of Contents for Eternus DX200F
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