Fujitsu ETERNUS DX60 S3 User Manual page 928

Appendix A Parameter List
A.6 Thin Provisioning Management
●
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
TPP)" (page 929)
• Stripe Depth
Description
Input condition/
Display contents
Available Stripe Depth value (for TPP)
The following table shows the available Stripe Depth value for each RAID level.
Mirroring (RAID1)
High Performance (RAID1+0)
Striping (RAID0)
High Capacity (RAID5)
High Reliability (RAID6)
High Reliability (RAID6-FR)
for details.
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
(page 928) for details.
•
64 KB
•
128 KB
•
256 KB
•
512 KB
•
1024 KB
RAID level Drive configuration (*1)
1D+1M
Any
3D+1P
4D+1P, 7D+1P
8D+1P, 12D+1P
Any
Any
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
"Restrictions for Stripe Depth modification (for
–
64KB, 128KB, 256KB, 512KB, 1024KB
64 KB, 128 KB, 256 KB, 512 KB
64 KB, 128 KB, 256 KB
64 KB, 128 KB
64 KB
64 KB
928
"Available Stripe Depth value (for TPP)"
Available Stripe Depth value
P2X0-1270-13ENZ0