WO1994020902B1 - System for dynamically selecting optimum i/o operating system in a disk drive system - Google Patents
System for dynamically selecting optimum i/o operating system in a disk drive systemInfo
- Publication number
- WO1994020902B1 WO1994020902B1 PCT/US1994/001695 US9401695W WO9420902B1 WO 1994020902 B1 WO1994020902 B1 WO 1994020902B1 US 9401695 W US9401695 W US 9401695W WO 9420902 B1 WO9420902 B1 WO 9420902B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- operating system
- disk drive
- command
- storage means
- drive system
- Prior art date
Links
- 230000001934 delay Effects 0.000 claims 2
Abstract
A disk drive system (Fig. 1) for use with a host processor employs either a look ahead command set or a tag queuing command set. The system comprises a first storage (65) for storing an optimized look ahead operating system and an optimized tag queuing operating system; a first means connected to the first storage means for initially retrieving one of the operating systems (201); a second storage (19) for storing the initial operating system retrieved by the first means; a second means for detecting whether a command issued by the host processor is associated with the operating system that was not initially retrieved into the second means (203); and a third means for responding to the second means by retrieving the other operating system and storing the newly retrieved operating system in the second storage (19) in place of the initially stored operating system (204) and for transferring control to the newly stored operating system (208).
Claims
1. A disk drive system for use with a host processor where said host processor employs either a look ahead command set or a tag queuing command set for communicating with said disk drive system, said disk drive system comprising: first storage means for storing an optimized look ahead operating system and an optimized tag queuing operating system: first means connected to said first storage means for initially retrieving one of said operating systems stored in said first storage means; second storage means for storing said initial operating system retrieved by said first means; second means for detecting the condition that a command issued by said host processor is associated with said operating system that was not initially retrieved by said first means and stored in said second means; and third means responsive to said second means detecting said condition for retrieving from said first storage means said operating system that was not initially retrieved by said second means from said first storage means, for storing said newly retrieved operating system in said second storage means and for transferring control to said newly stored operating system.
2. The disk drive system of Claim 1 wherein said first storage means is a dedicated area in the magnetic media of said disk drive system.
3. The disk drive system of Claim 1 wherein when said disk drive system is operating under said first retrieved operating system, said second means tests each command issued by said host after that command has been completed to determine if said completed command was a command for the operating system that, was not initially retrieved.
4. The disk drive system of Claim 3 wherein said third means delays the sending of status that the command was completed to the host until after control has been switched to said newly loaded operating system when said second means has determined that said completed command was a command for the operating system that was not first retrieved by said first means.
5. A disk drive system for use with a host processor where said host processor employs either a look ahead command set or a tag queuing command set for communicating with said disk drive system, said disk drive system comprising: first storage means for storing an optimized look ahead operating system and an optimized tag queuing operating system: first means connected to said first storage means for initially retrieving said look ahead operating systems stored in said first storage means; second storage means for storing said look ahead operating system retrieved by said first means; second means for detecting the condition that a command issued by said host processor is associated with said tag queuing operating system; and third means responsive to said second means detecting said condition for retrieving from said first storage means said tag queuing operating system from said first storage means, for storing said tag queuing operating system in said second storage means and for transferring control to said tag queuing operating system.
6. The disk drive system of Claim 5 wherein said first storage means is a dedicated area in the magnetic media of said disk drive system.
7. The disk drive system of Claim 5 wherein when said disk drive system is operating under said look ahead operating system, said second means tests each command issued by said host after that command has been completed to determine if that said completed command was a tag queuing command.
8. The disk drive system of Claim 7 wherein said third means delays the sending of status that the command was completed to the host until after control has been switched to said tag queuing operating system when said second means has determined that said completed command was a command for said tag queuing operating system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6520000A JPH08507626A (en) | 1993-02-23 | 1994-02-15 | System for dynamically selecting an optical I / O operating system in a disk drive system |
| EP94909664A EP0746813A1 (en) | 1993-02-23 | 1994-02-15 | System for dynamically selecting optimum i/o operating system in a disk drive system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/021,244 US5428787A (en) | 1993-02-23 | 1993-02-23 | Disk drive system for dynamically selecting optimum I/O operating system |
| US08/021,244 | 1993-02-23 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO1994020902A2 WO1994020902A2 (en) | 1994-09-15 |
| WO1994020902A3 WO1994020902A3 (en) | 1994-11-10 |
| WO1994020902B1 true WO1994020902B1 (en) | 1994-11-24 |
Family
ID=21803150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1994/001695 WO1994020902A2 (en) | 1993-02-23 | 1994-02-15 | System for dynamically selecting optimum i/o operating system in a disk drive system |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5428787A (en) |
| EP (1) | EP0746813A1 (en) |
| JP (1) | JPH08507626A (en) |
| WO (1) | WO1994020902A2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5634081A (en) * | 1994-03-01 | 1997-05-27 | Adaptec, Inc. | System for starting and completing a data transfer for a subsequently received autotransfer command after receiving a first SCSI data transfer command that is not autotransfer |
| JP3597247B2 (en) * | 1995-03-15 | 2004-12-02 | 富士通株式会社 | Exchangeable medium type storage device, optical disk device, and data transfer control method |
| WO1997011426A1 (en) | 1995-09-18 | 1997-03-27 | Cyberstorage Systems, Inc. | Universal storage management system |
| US5991825A (en) * | 1997-07-11 | 1999-11-23 | International Business Machines Corporation | System for handling missed revolution in a disk drive by aborting the execution of primary command and executing secondary command if a missed revolution occurs |
| US6038613A (en) * | 1997-11-14 | 2000-03-14 | International Business Machines Corporation | Prefetching and storing device work information from multiple data storage devices |
| US6442715B1 (en) * | 1998-11-05 | 2002-08-27 | Stmicroelectrics N.V. | Look-ahead reallocation disk drive defect management |
| US20040226020A1 (en) * | 2000-09-28 | 2004-11-11 | Ati Technologies, Inc. | Method and system for using general and appliance operating systems in a single information handling device |
| US6591358B2 (en) | 2001-01-26 | 2003-07-08 | Syed Kamal H. Jaffrey | Computer system with operating system functions distributed among plural microcontrollers for managing device resources and CPU |
| US7418344B2 (en) * | 2001-08-02 | 2008-08-26 | Sandisk Corporation | Removable computer with mass storage |
-
1993
- 1993-02-23 US US08/021,244 patent/US5428787A/en not_active Expired - Lifetime
-
1994
- 1994-02-15 WO PCT/US1994/001695 patent/WO1994020902A2/en not_active Application Discontinuation
- 1994-02-15 EP EP94909664A patent/EP0746813A1/en not_active Withdrawn
- 1994-02-15 JP JP6520000A patent/JPH08507626A/en active Pending
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