Safely mapping and unmapping host SCSI volumes
US9779003B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Oct 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/3055
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, apparatus and computer program products implement embodiments of the present invention that include detecting, by a storage system, a change in a mapping of a logical volume to one or more host ports of a host computer communicating with the storage system via a storage area network (SAN). Subsequent to detecting the change, first and second input/output (I/O) requests for the logical volume are received from a given host port, and a first unit attention message is conveyed to the given host port in response to the first I/O request. A second unit attention message is conveyed to the given host port upon determining that the storage system received the second I/O request within a specific time period commencing upon receiving the first I/O request. However, the second I/O request can be performed if the storage system received the second I/O request subsequent to the specific time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.