The LSI Fastpath software key is an allusive feature.
It's not mentioned anywhere in any of LSI's utilities, webBIOS or MSM.
It's a very good feature I'm told, but how do we take advantage of it.
I've had a look around and found the MegaRAID® SAS Software User Guide
A behemoth PDF with all sorts of stuff in it.
But to enable Fastpath you basically need to do this:
The software in the Firmware should with the above settings use the Fastpath feature.
I'll attempt to do some tests and see how I get on.
It's not mentioned anywhere in any of LSI's utilities, webBIOS or MSM.
It's a very good feature I'm told, but how do we take advantage of it.
I've had a look around and found the MegaRAID® SAS Software User Guide
A behemoth PDF with all sorts of stuff in it.
But to enable Fastpath you basically need to do this:
So looking at the above you are basically by passing the cache on the controller.11.6 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 6Gb/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.
11.6.1 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 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
— Read Policy: No Read Ahead
— Disk Cache Policy: Disabled
— Strip Size: 64KB
4. Click OK.
A confirmation dialog displays.
5. Select the Confirm check box, and click Yes to confirm that you want to set the virtual drive properties.
The software in the Firmware should with the above settings use the Fastpath feature.
I'll attempt to do some tests and see how I get on.