Device driver, method and computer-readable medium for dynamically configuring a storage controller based on RAID type, data alignment with a characteristic of storage elements and queue depth in a cache
US9274713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2014 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Jul 15, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/502
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A storage controller coupled to a host computer is dynamically configured by a device driver executing in the host computer. The storage controller manages a logical volume for the host using a set of flash-based storage devices arranged as a redundant array of inexpensive disks (RAID). The device driver identifies a RAID type for the logical volume and a queue depth from a stream of I/O commands. For a logical volume in RAID 0, the device driver compares the queue depth to a threshold value and configures the storage controller to process the stream of I/O commands with a first path or an alternative path based on a result of the comparison. For a logical volume in RAID 5, the device driver performs a similar comparison and uses the result to direct the storage controller to use a write back or a write through mode of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.