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Dell PowerEdge RAID Controller 9 User’s Guide H330, H730, and H830

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FastPath

FastPath is a feature that improves application performance by delivering high I/O per second (IOPs) for the Solid State Drives (SSD). The Dell PowerEdge RAID Controller (PERC) 9 series supports FastPath.

To enable FastPath on a virtual disk the Dell PowerEdge RAID Controller (PERC) 9 series cache policies need to be set to Write-Through and No Read Ahead. This enables FastPath to use the proper data path through the controller based on command (read/write), IO size, and RAID type.

For small random workloads, like OLTP, a RAID 10 array provides high performance and for sequential read dominant workloads, a RAID5 array provides high performance.

NOTE:Only IO block sizes smaller than virtual disk’s stripe size are eligible for FastPath.
NOTE:The Physical Disk Power Management feature is not applicable to FastPath-capable virtual disks.

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