Fabric Switch Connection Configurations - Hitachi AMS 2100 Hardware Manual

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4. Click the Close button.
The processor operation rate becomes high while operating in the Response
Performance Mode compared to the rate in normal mode. When replacing
the firmware, it may not be replaced because the processor operation rate
is high. If you cannot replace it, Hitachi Data Systems recommends that you
replace it again after changing the mode to normal.
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NOTE:
• The Response Performance Mode is enabled only when the segment size is 16KB or
less. Be careful when using it with CachePartitionManager.
• When changing from the Response Performance Mode to the normal mode, if the I/
O load is heavy, you may not change the setting. In this case, perform it after the
host I/O stops according to the error message.
A note on using Dynamic Disk
You cannot use Dynamic Disk on Windows Server 2008 while reducing the
logical unit capacity.
A note on UNMAP Short Length Mode
The default status of the port option "UNMAP Short Length Mode" is as
follows:
• The port which includes the host group for which the Windows is
selected as platform: Enable (selected status).
• The ports other than the one described above: Disable (unselectable
status).

Fabric Switch Connection Configurations

With Fibre Channel (8Gbps), using ARB (FF) becomes a standard on behalf
of IDLE to reduce electrical noise. Therefore, the Fibre Channel (8Gbps)
interface for this array supports the IDLE/ARB (link initialization/fillword).
Do not set the Ports of Brocade Switch to mode 1 or mode 3 because the
phenomenon where LinkUP cannot be executed will occur if mode 1 or mode
3 is set for the Ports of Brocade Switch.
This array supports the number of BB Credits listed in
7–34
Configuration
Hitachi AMS 2100/2300 Storage System Hardware Guide
Table 7-11.