JPS6488818A - Memory structure - Google Patents
Memory structureInfo
- Publication number
- JPS6488818A JPS6488818A JP62246199A JP24619987A JPS6488818A JP S6488818 A JPS6488818 A JP S6488818A JP 62246199 A JP62246199 A JP 62246199A JP 24619987 A JP24619987 A JP 24619987A JP S6488818 A JPS6488818 A JP S6488818A
- Authority
- JP
- Japan
- Prior art keywords
- data
- sector
- code
- transferred
- storage position
- 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 simplify address calculation by divisionally allocating data in a data area and an error code area in a system where a memory such as a virtual disk is divided into arbitrary data blocks to transfer data with a block as the unit. CONSTITUTION:At the time of writing data, data in a sector to be written is transferred to the data storage position designated by a sector number, a head number, and a cylinder number, and a check sum code is generated and is stored in a pertinent check sum storage position. At the time of read, data corresponding to a designated sector is transferred to a designated address, and the check sum code is generated in the same manner as data write, and contents in the storage position corresponding to the transferred sector and the value generated during transfer are compared with each other; and if they are different from each other, the occurrence of read error is judged to set an error status. A virtual memory area 1 consists of data storage areas 11D-1nD and check code storage areas 11S-1nS.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62246199A JPS6488818A (en) | 1987-09-30 | 1987-09-30 | Memory structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62246199A JPS6488818A (en) | 1987-09-30 | 1987-09-30 | Memory structure |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6488818A true JPS6488818A (en) | 1989-04-03 |
Family
ID=17144983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62246199A Pending JPS6488818A (en) | 1987-09-30 | 1987-09-30 | Memory structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6488818A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19743239A1 (en) * | 1997-09-30 | 1999-04-08 | Siemens Ag | Testing groups of data consisting of several bytes |
-
1987
- 1987-09-30 JP JP62246199A patent/JPS6488818A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19743239A1 (en) * | 1997-09-30 | 1999-04-08 | Siemens Ag | Testing groups of data consisting of several bytes |
DE19743239C2 (en) * | 1997-09-30 | 1999-07-15 | Siemens Ag | Method for checking groups of data formed from several bytes |
US6256765B1 (en) | 1997-09-30 | 2001-07-03 | Siemens Aktiengesellschaft | Method for checking groups of data formed from a plurality of bytes |
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