JPS6482240A - Information processing system - Google Patents
Information processing systemInfo
- Publication number
- JPS6482240A JPS6482240A JP62238857A JP23885787A JPS6482240A JP S6482240 A JPS6482240 A JP S6482240A JP 62238857 A JP62238857 A JP 62238857A JP 23885787 A JP23885787 A JP 23885787A JP S6482240 A JPS6482240 A JP S6482240A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- error
- controller
- disk
- diagnosis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE:To control a disk even in case of the occurrence of cache memory self-diagnosis error by providing an FF which is set when error is detected as the result of self-diagnosis of a disk controller. CONSTITUTION:When error occurs when a disk controller 2 self-diagnosis a cache memory 1, the controller 2 sets a cache error FF 6 and the occurrence of error is stored. When receiving a cache access command from a host computer 5, the controller 2 refers to the FF 6 and reports error of the memory 1 to the host computer 5 because of set of the FF 6. Then, the computer 5 designates the cache memory off mode to the controller 2 to invalidate the function of the memory 1 and directly transfers data to the disk without passing the memory 1. Consequently, the memory 1 is invalidated to control the disk without losing the function of the controller 2 even at the time of generating self-diagnosis error of the memory 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238857A JPS6482240A (en) | 1987-09-25 | 1987-09-25 | Information processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62238857A JPS6482240A (en) | 1987-09-25 | 1987-09-25 | Information processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6482240A true JPS6482240A (en) | 1989-03-28 |
Family
ID=17036292
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62238857A Pending JPS6482240A (en) | 1987-09-25 | 1987-09-25 | Information processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6482240A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07334424A (en) * | 1994-06-08 | 1995-12-22 | Nec Corp | Hard disk unit |
-
1987
- 1987-09-25 JP JP62238857A patent/JPS6482240A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07334424A (en) * | 1994-06-08 | 1995-12-22 | Nec Corp | Hard disk unit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO1987000316A3 (en) | Fault tolerant data processing system | |
MY121544A (en) | Execution of data processing instructions. | |
EP0242879A3 (en) | Data processor with wait control allowing high speed access | |
EP0285346A3 (en) | Cache memory device | |
JPS6482240A (en) | Information processing system | |
EP0297891A3 (en) | Apparatus and method for main memory unit protection using access and fault logic signals | |
JPS5533288A (en) | Hysteresis recording control system of multi-processor system | |
JPS55134462A (en) | Memory control unit | |
JPS6436339A (en) | Self-diagnosis system | |
JPS57199062A (en) | Disc controller | |
JPS6476343A (en) | Cache memory control system | |
JPS5362939A (en) | Common information control system | |
JPS649561A (en) | Computer | |
JPS5712469A (en) | Buffer memory control system | |
JPS6461837A (en) | Memory control system | |
JPS642162A (en) | Duplicated computer system | |
JPS642155A (en) | Write controlling method for external memory device | |
JPS55154649A (en) | Disc cash write-in system | |
JPS6413648A (en) | Bus system | |
JPS6446860A (en) | Disk cache device | |
JPS5633750A (en) | Information retrieving system for common bus computer system | |
JPS647143A (en) | Write back system for cache system | |
JPS645144A (en) | Communication controller | |
JPS57207967A (en) | Magnetic tape controller having information updating function | |
JPS6433768A (en) | Disk releasing system at the time of generating trouble |