Fujitsu ETERNUS DX8100 S3 - Page 207

Chapter 4 Volume Status
4.4 Performance (Advanced Copy)
ETERNUS Web GUI User’s Guide (Operation)
Copyright 2016 FUJITSU LIMITED P2X0-1260-19ENZ0
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• Usage
The usage of the volume is displayed.
- Block
The volumes that are used for the SAN.
- Block/Dedup
The Deduplication/Compression Volumes.
- File
The volumes that are used for the NAS.
- System
The volumes that are used for management information.
Refer to "Usage Details" (page 228)
in "4.11 Volume Detail (Basic)" (page 223) for details.
• Read IOPS
The read count per second is displayed.
• Write IOPS
The write count per second is displayed.
• Read Throughput
The amount of transferred data that is read per second is displayed.
• Write Throughput
The amount of transferred data that is written per second is displayed.
• Read Cache Hit Rate
The cache hit rate (for read) is displayed.
• Write Cache Hit Rate
The cache hit rate (for write) is displayed.
• Prefetch Cache Hit Rate
The cache hit rate (for prefetch) is displayed.
• Extreme Cache Cache Hit Rate
The cache hit rate of EXC for read I/O is displayed.
This item is displayed when EXC or EXCP is enabled for the ETERNUS DX. A "-" (hyphen) is displayed for
volumes where EXC and EXCP are disabled. Enabling or disabling EXC for the volume can be performed
with ETERNUS CLI or ETERNUS SF Storage Cruiser. Enabling or disabling EXCP for the volume can be
performed with ETERNUS Web GUI. Refer to "Modify Cache Parameters" in "ETERNUS Web GUI User’s Guide
(Settings)" for details.
The mode (Extreme Cache or Extreme Cache Pool) that is being used for the ETERNUS DX is displayed in
the [System Settings] screen. Refer to "2.12 System Settings" (page 71)
for details.
A "-" (hyphen) is usually displayed for the following volumes:
• Volume type is "SDV" or "SDPV"
• Volumes that are created in a RAID group or a TPP configured with SSDs or SSD SEDs
• ODX Buffer volumes