Discovery and isolation of misbehaving devices in a data storage system
US7036042B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 2002 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Dec 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/437
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data storage system includes controller nodes and a storage component. The controller nodes couple the storage component to a host. The storage component includes a controller and sleds with disk drives. The host and the storage component form an arbitrated loop. When the arbitrated loop is down, the controller removes the storage component from the arbitrated loop so the controller, the sleds, and the disk drives form an internal loop. When the internal loop is also down, the controller tests each of the sleds individually and marks those that are not responding properly. If a sled is responding properly the controller tests each of the drives in that sled individually and marks those that are not responding properly. The controller adds back into the internal loop the sleds and the drives that are not marked as bad, and then the storage component back into the arbitrated loop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.