JPS6479975A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPS6479975A JPS6479975A JP23768387A JP23768387A JPS6479975A JP S6479975 A JPS6479975 A JP S6479975A JP 23768387 A JP23768387 A JP 23768387A JP 23768387 A JP23768387 A JP 23768387A JP S6479975 A JPS6479975 A JP S6479975A
- Authority
- JP
- Japan
- Prior art keywords
- record
- flag
- records
- read out
- final
- 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 correctly read out data from a data track by adding a flag capable of discriminating other records than the final record to the final record of the records to be written in a series of format operations. CONSTITUTION:In a write format of the titled magnetic disk device, a home address exists immediately after an index mark, and a record exists after the home address. A count part of the record consists of a bit of defective information 11, a bit of address information 12, a record number 13, a record length 14 and a final record flag 15. As to the flag 15, [FF] is written in case of the final record, and [00] in case of other records. When all records are read out, the read is carried out by confirming the flag 15 of the count part of the record to be read out by a host device. By this method, even when the count part is unable to be read out, if the flag 15 is [00], a record exists, thus showing the occurrence of a read error, and if it is [FF], no record is determined to exist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23768387A JPS6479975A (en) | 1987-09-21 | 1987-09-21 | Magnetic disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23768387A JPS6479975A (en) | 1987-09-21 | 1987-09-21 | Magnetic disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6479975A true JPS6479975A (en) | 1989-03-24 |
Family
ID=17018961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23768387A Pending JPS6479975A (en) | 1987-09-21 | 1987-09-21 | Magnetic disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6479975A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5194109A (en) * | 1988-11-14 | 1993-03-16 | Idemitsu Petrochemical Co., Ltd. | Method for recovering scraps of multi-layer plastic sheet or film |
-
1987
- 1987-09-21 JP JP23768387A patent/JPS6479975A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5194109A (en) * | 1988-11-14 | 1993-03-16 | Idemitsu Petrochemical Co., Ltd. | Method for recovering scraps of multi-layer plastic sheet or film |
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