Areca ARC-8050T3U 6-Bay Thunder3 Desktop RAID Storage Array - Manual (Page 99)

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WEB BROWSER-BASED CONFIGURATION
processing of stream data. This setting is an object of trans-
ferring stream data efficiently on an existing RAID controller.
Normally you should not need to modify this value. Default
value is 6. You can select between 6~256.
To decide how to set AV stream play out parameter, you need
to check the Number of Stream, Amount of Read Ahead, and
Total Cache Memory during runtime. You can try to adjust the
three numbers to get the best performance as your require-
ment. Number of Stream shows the number of stream added
to the system, Amount of Read Ahead shows the amount
of Read Ahead data taken from the cache without real disk
execution, and Total Cache Memory shows the total available
memory being installed in the RAID controller.
• Optimize AV Recording
AV recording option is for video recording (no time limit), but
if used in normal operation, performance may be degraded.
This new feature there are 4 options; Disabled, Mode1, Mode2
and Mode 3. Default value is “Disabled”. Our controller cache
uses LRU method; there have no special memory capacity re -
served for read or write. The Mode 1, 2 and 3 are used to de-
fine the command sorting method. The default sorting method
is helpful for normal applications, but not useful for AV ap-
plications, so we have defined three different sorting methods
for these special applications. To decide how to optimize AV
stream recording parameter, you need to adjust the Optimize
AV Recording, and Write Buffer Threshold during runtime.
• Read Performance Margin
The “Read Performance Margin” is for controller to reserve
n% read margin during AV stream recording. It is designed to
eliminate the frame drop and ensure to provide the smooth
and stable performance on the application.
• Write Performance Margin
The “Write Performance Margin” is for controller to reserve n%
write margin AV stream recording.
AJA Mode Usage:
1. Controller needs to reboot when you adjust the following
settings.