Fujitsu ETERNUS DX60 S3 User Manual page 918

Appendix A Parameter List
A.5 RAID Group Management
• Drive Access Priority
Description
Input condition/
Display contents
• Drive Tuning Parameter Setting
Description
Input condition/
Display contents
When selecting multiple RAID groups as the target of this function and "Enable" is specified for the "Drive Tuning
Parameter Setting", the "Throttle" and "Ordered Cut" values set in this screen are applied to the target RAID groups.
Select the drive access priority.
It is not necessary to change the default setting for normal use. When not changing the
setting, select "Do not change". This item is not displayed when a RAID group that is
configured with SSDs or SSD SEDs is selected. For SSDs and SSD SEDs, this item is fixed to
"Response".
The throughput for all of the drives is improved when "Throughput" is selected because
data is collectively written to the same drive. However, the performance of each com-
mand response may be reduced because queuing processes for host I/O are not per-
formed by using the FIFO (first in, first out) method.
•
Do not change
•
Response
Commands are issued in order during drive access to speed up a response to the
host.
•
Throughput
The command issuance order is changed and data is collectively written to the same
drive during drive access to improve the throughput for all of the drives.
Specify whether to "Enable" or "Disable" the following drive tuning parameters.
•
Throttle
•
Ordered Cut
It is not necessary to change the default setting for normal use. When not changing the
"Throttle" and "Ordered Cut" setting values, select "Do not change".
Note that "Do not change" is always selected when this function is started.
•
Do not change
•
Enable
•
Disable
918
ETERNUS Web GUI User's Guide (Settings)
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