Methods and structure for determining mapping information inconsistencies in I/O requests generated for fast path circuits of a storage controller
US8583840B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2012 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Apr 25, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/1076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and structure are disclosed for improved processing of fast path I/O requests in a storage controller utilizing version information embedded in the fast path I/O requests. The version information allows the storage controller to determine if the mapping information utilized by the host system in generating a fast path I/O request specifies the mapping information utilized by the storage controller. The controller comprises a fast path I/O request processing circuit tightly coupled with host system drivers for fast processing of requests directed to storage devices of a logical volume. The controller also comprises a logical volume I/O processing software stack for processing I/O requests from a host system directed to a logical volume. If the mapping information utilized by the host does not match the mapping information utilized by the storage controller, fast path I/O requests are transferred to the I/O request processing stack for subsequent processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.