LSI Corporation
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12Gb/s MegaRAID SAS Software User Guide
March 2014
Chapter 12: Using MegaRAID Advanced Software
Fast Path Advanced Software
Figure 228 Confirm Delete Virtual Disk
2. Select the Confirm check box, and click Ye s .
NOTE If you select the Force the delete to complete quickly check box to
delete the virtual drive, the data is not flushed before deleting the
virtual drive. In this scenario, if you create this virtual drive after
deleting it, there will be no data available.
12.11 Fast Path Advanced Software
MegaRAID Fast Path is a high-performance I/O accelerator for the CacheCade software drive groups connected to a
MegaRAID controller card. The CacheCade software has a read performance advantage over HDDs and uses less
power. This feature dramatically boosts storage subsystem bandwidth and overall transactional application
performance when used with a 12Gb/s MegaRAID SATA+SAS controller.
The Fast Path feature supports full optimization of the CacheCade software and hard disk drive (HDD) virtual disk
groups to deliver an improvement in read and write IOPS that is three times greater than MegaRAID controllers not
using Fast Path technology. Also, the Fast Path advanced software is faster and more cost-effective than current
flash-based adapter card solutions.
12.11.1 Setting Fast Path Options
Perform the following steps to use the Fast Path advanced software:
1. Select the Logical tab on the MegaRAID Storage Manager window for the Logical view.
2. Select a virtual drive icon in the left frame.
3. Select Go To > Virtual Drive > Set Virtual Drive Properties on the menu bar.
The Set Virtual Drive Properties dialog appears. It shows the default settings for the Fast Path advanced
software:
— Write Policy: Write Thru
— IO Policy: Direct IO
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