Fujitsu ETERNUS AF250, Руководство пользователя

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Chapter 1 Screen Operations
1.1 Overview
ETERNUS Web GUI User’s Guide (Operation)
Copyright 2016 FUJITSU LIMITED P2X0-1260-19ENZ0
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• Deduplication/Compression
Whether the Deduplication/Compression function is enabled or disabled is displayed.
For the ETERNUS DX60 S3/DX100 S3 and the ETERNUS DX8100 S3/DX8700 S3/DX8900 S3, this item is not
displayed.
• Serial Number
The serial number of the ETERNUS DX/AF is displayed.
• Firmware Version
The current controller firmware version is displayed.
- VxxLyy-zzzz (Vxx: Version, Lyy: Level, zzzz: Release number)
• Status
The detailed general status of the ETERNUS DX/AF is displayed. If the storage system is in normal status,
"
" is displayed. Refer to "A.1.1 Storage System General Status (Detail)" (page 405) for details.
• Cache Mode
The current cache mode and the factor of the mode are displayed. The normal status is "Write Back Mode".
For the ETERNUS DX8700 S3/DX8900 S3, click this item to display the [Controller Enclosure] screen. Refer to
"3.2 Controller Enclosure" (page 81) for details.
- Write Back Mode
When a Write request is issued from the host, "Write Complete" is displayed after writing to the cache
area is complete.
- Write Through Mode
When a Write request is issued from the host, "Write Complete" is displayed after writing to the cache
area and the drives is complete.
In the Write Through Mode, "Write Through (factors)" is displayed. When there are multiple factors, all
the factors are separated with a "/" (slash) and displayed.
The factors of the Write Through Mode are described below:
• Write Through (Pinned Data)
A large amount of pinned data (*1) occurred in the ETERNUS DX/AF.
• Write Through (Battery)
The battery charge level is low.
• Write Through (Maintenance)
One of the following functions is currently being used:
- Upgrading the controller firmware in hot mode
- Changing the Controlling CM of the RAID group
- Adding the Controller Module (*2)
- Setting the Deduplication/Compression mode (when enabling)
- Setting the exclusive read cache size
• Write Through (1CM)
The ETERNUS DX/AF operated with 1CM. (*3)
*1: "Pinned data" is the data left in the cache memory due to unsuccessful write-back to the volume from the
cache memory.
*2: When reassigning the Controlling CM for the RAID group using all normal CMs including the added CM,
the cache mode is temporarily changed to "Write Through Mode" during a configuration.
*3: This mode is displayed when "1CM Write Through" is enabled by using the procedure in "Setup Subsystem
Parameters" in "ETERNUS Web GUI User’s Guide (Settings)" function and the ETERNUS DX/AF operated
with 1CM (only 1CM can be used due to an error such as a CM failure). The "1CM Write Through" setting
for the "Setup Subsystem Parameters" function is displayed and can be changed when logged in using a
user account with the "Maintenance Operation" policy. The initial state is "Disable".