Fujitsu ETERNUS DX60 S3 User Manual page 672

Appendix A Parameter List
A.1 System Management
A.1.3.4 Setup Subsystem Parameters
For details about this function, refer to
For the factory default settings for this function, refer to
973).
●
Setup Subsystem Parameters
• Thin Provisioning Allocation Mode
Description
Input condition/
Display contents
The "Thin Provisioning Allocation Mode" is available only when the Thin Provisioning function is enabled.
"1.4.4 Setup Subsystem Parameters" (page
Select allocation mode of Thin Provisioning.
This mode is applied only for Thin Provisioning pools. Note that this setting is not
applied for pools that are created by the Flexible Tier (automatic storage layering)
function.
[Example]
Three TPVs (TPV#0, TPV#1, and TPV#2) are registered in a single TPP.
A single TPP is configured with four RAID groups (RAID group #0, RAID group #1, RAID
group #2, and RAID group #3).
•
TPP balancing
Physical area is allocated in the following order regardless of the TPV in which the
data is written.
RAID group#0  RAID group#1  RAID group#2  RAID group#3 
RAID group#0  ...
•
TPV balancing
When data is written in TPVs that are registered in the TPP, the physical area is
allocated in the following order.
TPV#0: RAID group#0  RAID group#1  RAID group#2  RAID group#3  RAID
group#0  ...
TPV#1: RAID group#1  RAID group#2  RAID group#3  RAID group#0  RAID
group#1  ...
TPV#2: RAID group#2  RAID group#3  RAID group#0  RAID group#1  RAID
group#2  ...
•
TPP balancing
Physical area is allocated almost evenly from the RAID groups that configure a TPP.
Allocation is performed in order of writing to the TPV.
This is a conventional method.
•
TPV balancing
Physical area is allocated almost evenly from the RAID groups that configure a TPP.
Allocation is performed by distributing RAID groups evenly for each TPV.
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39).
"Appendix B Setup Subsystem Parameters" (page
P2X0-1270-13ENZ0