JPS6446265A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPS6446265A JPS6446265A JP20292687A JP20292687A JPS6446265A JP S6446265 A JPS6446265 A JP S6446265A JP 20292687 A JP20292687 A JP 20292687A JP 20292687 A JP20292687 A JP 20292687A JP S6446265 A JPS6446265 A JP S6446265A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- head
- address mark
- circuit
- stored
- 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
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PURPOSE:To prevent a medium defect from being erroneously detected as an address mark by storing a medium defect position beforehand, and prohibiting the detection of the address mark when the instruction to detect the address mark is received and while the present position of a head is coincident with the stored medium defect position. CONSTITUTION:When the medium detect position stored by a defect position storing circuit 1 is coincident with the present position of the head indicated by a head address register 2, a cylinder register 3 and a rotation position detecting circuit 4, a comparing circuit 5 outputs a prohibiting signal 6. An address mark detection instructing signal 7 is received, a flip flop circuit 10 to arrive at a part, where data are omitted, is set, and when the prohibiting signal 6 is active, namely, when the signal 6 is at the medium defect position stored by the present position of the head, a counter-up signal 12 or a counter- down signal 13 in a counter circuit 11 is not outputted. Thus, when the present position of the head is the stored medium defect position, the detection of the address mark is prohibited.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20292687A JPS6446265A (en) | 1987-08-13 | 1987-08-13 | Magnetic disk device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20292687A JPS6446265A (en) | 1987-08-13 | 1987-08-13 | Magnetic disk device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6446265A true JPS6446265A (en) | 1989-02-20 |
Family
ID=16465445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20292687A Pending JPS6446265A (en) | 1987-08-13 | 1987-08-13 | Magnetic disk device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6446265A (en) |
-
1987
- 1987-08-13 JP JP20292687A patent/JPS6446265A/en active Pending
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