Composite drive controller including composite disk driver for supporting composite drive accesses and a pass-through driver for supporting accesses to stand-alone SCSI peripherals
US5548783A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1993 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Oct 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0673
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A drive array controller is provided that serves as an interface between both stand-alone SCSI devices as well as SCSI devices that form a composite drive. Since an AHA emulation interface is incorporated on the drive array controller, the drive array controller is compatible with conventional AHA device drivers that drive stand-alone peripheral devices such as SCSI CD-ROM units and SCSI tape drives. The drive array controller includes a SCSI pass-through driver that extracts a SCSI command descriptor block from a command control block created by the AHA device driver. The drive array controller further provides a separate peripheral access channel to support high speed composite drive operations through a composite device driver. Since the AHA emulation interface and a composite drive interface are provided on a common peripheral board, only one EISA expansion slot is occupied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.