JPS4860545A - - Google Patents
Info
- Publication number
- JPS4860545A JPS4860545A JP9135572A JP9135572A JPS4860545A JP S4860545 A JPS4860545 A JP S4860545A JP 9135572 A JP9135572 A JP 9135572A JP 9135572 A JP9135572 A JP 9135572A JP S4860545 A JPS4860545 A JP S4860545A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- faces
- blocks
- module
- recorded
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B20/1252—Formatting, e.g. arrangement of data block or words on the record carriers on discs for discontinuous data, e.g. digital information signals, computer programme data
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2508—Magnetic discs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
1378983 Digital data storage INTERNATIONAL BUSINESS MACHINES CORP 6 Oct 1972 [17 Nov 1971] 46161/72 Heading G4C Data are written on sequential tracks of a disc stack cylinder until a break point is reached, after which data are written on another disc stack or on sequential tracks of another cylinder of the same stack. In one embodiment having three disc packs each with 20 disc faces, each block of data in a string corresponds in length to one track on a disc. Assuming module 0 has a first available track at cylinder 2, face 5, the first 15 blocks of a string are recorded on faces 5-19 of cylinder 2 and the next 5 blocks of the string are recorded on cylinder 3 starting at face 0, for example. Blocks 20 are recorded in module 1, for example at first available cylinder 5 of faces 10-19 and cylinder 6 of faces 0-9. Similarly blocks 40-59 are recorded in module 2 at first available cylinder 1 of faces 4-19 and cylinder 2 of faces 0-3. This arrangement may require head movement for each group-of 20 blocks, depending on the location of the first available face in each module. In a second embodiment, blocks are recorded in succession on the first available faces in each module taken in turn and head movement only takes place if overflow from the last module occurs. Taking the same example as above, blocks 0-14 are recorded in module 0, cylinder 2, faces 5-19; blocks 15-24 in module 1, cylinder 5, faces 10-19; blocks 25-39 in module 2, cylinder 1, faces 4-18; block 40 in module 2, cylinder 1, face 19; blocks 41-59 would then be recorded in module 0, cylinder 3, faces 0-18. Algorithms for calculating the addresses of the various blocks in storage are described.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19969271A | 1971-11-17 | 1971-11-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS4860545A true JPS4860545A (en) | 1973-08-24 |
Family
ID=22738615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9135572A Pending JPS4860545A (en) | 1971-11-17 | 1972-09-13 |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS4860545A (en) |
CA (1) | CA990412A (en) |
DE (1) | DE2254884A1 (en) |
FR (1) | FR2160384B1 (en) |
GB (1) | GB1378983A (en) |
IT (1) | IT967615B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5122409A (en) * | 1974-08-16 | 1976-02-23 | Hitachi Ltd | JIKIDORAMUYOINTAAFUEISU |
JPS54146539A (en) * | 1978-05-09 | 1979-11-15 | Toshiba Corp | Process method in response to division of magnetic disk face |
JPS62217319A (en) * | 1986-03-18 | 1987-09-24 | Nec Corp | Access control system for disk device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2650891B2 (en) * | 1986-04-16 | 1997-09-10 | 株式会社日立製作所 | Method of controlling rotary storage device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL286146A (en) * | 1961-12-26 | |||
GB1169506A (en) * | 1967-06-23 | 1969-11-05 | Ncr Co | Improvements in or relating to Magnetic Memory Systems. |
-
1972
- 1972-09-13 JP JP9135572A patent/JPS4860545A/ja active Pending
- 1972-09-19 IT IT2937972A patent/IT967615B/en active
- 1972-10-06 GB GB4616172A patent/GB1378983A/en not_active Expired
- 1972-10-18 FR FR7237563A patent/FR2160384B1/fr not_active Expired
- 1972-11-09 DE DE19722254884 patent/DE2254884A1/en active Pending
- 1972-11-14 CA CA156,421A patent/CA990412A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5122409A (en) * | 1974-08-16 | 1976-02-23 | Hitachi Ltd | JIKIDORAMUYOINTAAFUEISU |
JPS5736615B2 (en) * | 1974-08-16 | 1982-08-05 | ||
JPS54146539A (en) * | 1978-05-09 | 1979-11-15 | Toshiba Corp | Process method in response to division of magnetic disk face |
JPS62217319A (en) * | 1986-03-18 | 1987-09-24 | Nec Corp | Access control system for disk device |
Also Published As
Publication number | Publication date |
---|---|
CA990412A (en) | 1976-06-01 |
FR2160384A1 (en) | 1973-06-29 |
DE2254884A1 (en) | 1973-05-24 |
IT967615B (en) | 1974-03-11 |
FR2160384B1 (en) | 1977-07-29 |
GB1378983A (en) | 1975-01-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0031499A3 (en) | Data processing apparatus adapted for memory readback checking | |
GB1360401A (en) | Memory system including buffer memories | |
ES421839A1 (en) | Data processing memory system with bidirectional data bus | |
GB1320935A (en) | Data storage | |
GB1452514A (en) | Data store information regeneration | |
JPS5250132A (en) | Information processing control unit | |
NL6918206A (en) | ||
GB1117905A (en) | Data storage systems | |
FR2160384B1 (en) | ||
GB1313530A (en) | Two-level storage system | |
GB1110994A (en) | Data storage addressing system | |
JPS55115121A (en) | Input and output control unit possible for duplicated recording | |
GB1529917A (en) | Data processing apparatus | |
CH520981A (en) | Buffer storage for data processing systems | |
UST972003I4 (en) | Sort/merge algorithm | |
JPS5731040A (en) | Data comparison system | |
FR2250449A5 (en) | Protection system for data processor interruption - has double memory bank with each bank divided into two parts | |
GB968542A (en) | Improvements in and relating to information transfer apparatus | |
JPS57162053A (en) | Data write system | |
GB1403527A (en) | Data transmission systems | |
JPS55135950A (en) | Data processing system | |
FR2275842A1 (en) | Data recording system using electrostatic recording device - with individual parts of matrix recorded by stylus system | |
GB1484317A (en) | Read/write circuits for digital recording | |
GB1394601A (en) | Memory circuits | |
JPS5371536A (en) | Data input system |