Fujitsu ETERNUS DX60 S3 User Manual page 311

Chapter 6 RAID Group Status
6.2 Tuning
- "-" (hyphen)
A RAID group that is not used
• RAID Level
The RAID level is displayed.
- High Performance (RAID1+0)
- High Capacity (RAID5)
- High Reliability (RAID6)
- High Reliability (RAID6-FR)
- Reliability (RAID5+0)
- Mirroring (RAID1)
- Striping (RAID0)
• Total Capacity
The total capacity of the RAID groups is displayed.
• Rebuild Priority
The rebuild priority of the RAID group is displayed.
When the Rebuild Priority is "Low", give priority to host access.
When the Rebuild Priority is "Middle", give the same priority as the host access to rebuild, copyback, and
redundant copy.
When the Rebuild Priority is "High", give priority to rebuild, copyback, and redundant copy.
A "-" (hyphen) is displayed for the RAID group that is registered as an EXCP.
• DCMF
The Drive Command Multiplying Factor (DCMF) is displayed.
If the DCMF is changed, the number of commands issued to the drive is increased in multiples of the DCMF
set value (if DCMF is "2", it is double).
• Drive Access Priority
The drive access priority is displayed.
When "Response" is specified, responses to host I/O are given priority over throughput.
When "Throughput" is specified, throughput is given priority over responses to host I/O.
When the drives that configure the target RAID group are SSDs or SSD SEDs, a "-" (hyphen) is displayed.
• Throttle
The throttle value is displayed.
Throttle is the proportion of the number of commands that are issued to a drive at the same time to the
maximum number of commands that can be issued. When the throttle value is "100%", the maximum
number of commands specified for each drive (the default number of commands) are issued.
When "Drive Tuning Parameter Setting" of the [Modify RAID Group Parameters] function is disabled, a "-"
(hyphen) is displayed.
When logged in with a user account that has a default "Monitor" role, this item is not displayed.
• Ordered Cut
Ordered Cut is displayed between 0 and 65535.
Ordered Cut is the number of commands for optimizing drive access processing (priority control). When
Ordered Cut is "x", the command to perform the priority control is issued for every x commands issued, and
priority control is performed for the command issued before this command.
When Ordered Cut is "0", the interval for priority control (priority control at every "x" commands) cannot be
specified. All of the commands issued to the drive are processed according to their priority settings.
When "Drive Tuning Parameter Setting" of the [Modify RAID Group Parameters] function is disabled, or the
configuration drive of the RAID group is SSD or SSD SED, a "-" (hyphen) is displayed.
When logged in with a user account that has a default "Monitor" role, this item is not displayed.
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ETERNUS Web GUI User's Guide (Operation)
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