MAGNETIC PLATE STORAGE

The invention refers to Magnetplattenspeieher with rotary Speichermediuna. Magnetic plate storage with so-called rigid plates and a wabenförmigen Kopfträger, that itself radially to Innenbzw. Exterior of such a axial disk pack moved, are well-known. A difficulty with this Plattenstapein lies that the volumetric efficiency and the costs achieve extrcme values with increasing storage capacity. Flexible recording media are far less expensive and appropriate plates can be more closely together-stacked, so that a larger volumetric efficiency results. If the recording density rises to rigid plates more i/ber the borders used at present outside, tolerance problems on during the Spurverfolgung, the trace addressing generally step and during a reliable recording and rendition. To earlier solutions, e.g. DE-AS 1424516, these problems belongs the division in zones of the disk surface into radial volumes, so that the bit component density for a given data communication frequency not excessively changes from the outside radius to the internal radius of each zone. The Datenübertragnngsrate varies from a zone to the other one typically with a difference of 2: 1 between the internal and the outermost zone. This difference requires channels of different Bandbrcite. System problems with length different on designs limited however apparently the application of this volume organization. In addition the Bandteinteilung provided as well known for the adaptive reconciliation of the read signal, i.e. the Ausgleiehstechniken for each volume automatically switched according to the speed of the recording surface regarding a abfiihlenden transducer. Virtueile of mass storage systems used favourably firm block length for the easier space administration and addressing. Most common data records have a variable length and thus adapt the program in virtual memory systems the different block length the different Technil EN. During the administration of the memory space for use in virtual memory systems a firm block length has however determines advantages. The task of the invention is from there the creation of a specific format and a circuit for a disk memory, which system parameter but also physical tolerances do not only akkunnuliert, which have a substantial influence on the data track choice and data track pursuit. The solution of this task exists in particular in the characteristic of the patent claim 1. Remark examples of the invention are represented and are afterwards more near described in the designs. Show: Fig. 1 in a simplify-perspective diagram a data storage unit, Fig. 2 in a Diagr.mm the extent relationship between a angle index indicator or a speedometer and a recording disk Zuverlässigkeifsmarke (angle index); Fig. 3 in a diagram according to invention subdivided a recording plate; Fig. 4 in a Diagr.mm and a Blockschauhild the Signaifiuß in Fig. 3 format shown of using equipment; Fig. 5 in a diagram a preferential trace format, that in connection with in Fig. 3 represented format to be used can; Fig. 6 in a diagram one with in Fig. 5 trace format shown usable data sector; Fig. 7 a Zeitdiagramm for the sector addressing and Fig. 8 in a simplified Diagr.mm Servound data signal disconnecting switch. In the designs same numbers mark same parts and elements. In Fig. 1 is a coaxial Stap.eI --10-- from recording plates --11-- shown, itself in a unit-on-a-common wave --12-- turn, those from an engine--13-- one propels. A speedometer plate --14-- is likewise on the wave --I2-- fastened. Except the angle index markings --15-- the speedometer plate has ---14M-- a reliability marking --16--, which is related to a keyway (later shown and described), the all plates in the pile --10-- at the extent it aligns in such a way that the reliability mark --17--, which is separately on a common radius noted by all plates, a measurable and-given relationship with the speedometer index --16-- has. Because of the manufacturing tolerances connected with the assembly such equipment the speedometer mark can --16-- in the angle opposite the Zuverlässigkeits Radiailinie --17-- shifted an angle its, --18-- in Fig. 2 is indicated. In Fig. , like such a shift or transfer, those shows 4 represented equipment for each recording disk --11-- different to be it can, becomes automatically so balanced that the specific format of the invention manufacture tolerances of a pile --10-- for flexible or rigid recording disk-adjusts. In Fig. the Formatkonfignration of the invention is shown 3 and descriptive. Suitably at the tubing spindle --12-- fastened plate --11-- is at the extent by a wedge --20-- the wave --12-- oriented, that into a keyway--21--into the basic document --22-- for rigid plates intervenes. The document --22-- has an outside circular recess, those by the broken line --23-- is represented, for the admission of the plate --11--. The two parts --22 and 11-- are preferably responsible secured. With building the pile up --10-- then each plate must --11-- exactly on the appropriate middle trngende document --22-- and the keyway --21-- with the radially running Zuverlässigkeitsliuie --17-- each plate to be aligned. Even if Präzisionswerkzeuge can be used with the production, this Zusa exhibits - mensetzung still certain tolerances. The plates are preferably described with the servo information, before the pile is built up and each plate is wedged. The tolerance angle --18-- becomes corresponding with the circuits of the Fig described later. 4 so laid out that these tolerances for the exact identification of the sectors on the plate --Ii-- are accumulated. The Taehometerindex --14-- is in Fig. 3 by the broken line --16I-- represented. The manufacture tolerances should be preferably symmetrically around the ideal or perfect agreement arranged, those by the line --161-- is shown. The speedometer index --16th-- lies upward from the radial reliability line--17--ineinem angle, which is larger than the tolerance in the angle --18-- . Thus electronic circuits can based on the speedometer index --16-- to be initialized and then each plate according to the tolerances be calibrated, so that the radial reliability line --17-- and for the designation of angle positions of each sector in everyone the Aufzeiehnungszonen shown is exactly located --A, B, C or D-- the plate --11-- to be used can. Since the angle addressing is preferred for the designation of the sector situations, the tolerance angle lies --18-- in the so-called out gangsadreßbereieh, that in Fig. 3 is designated by the sectors --A0, B0, CO and D0--. The Ausgangsadreßbereiehe must have thus an angular dimension, which is larger than the largest Fertigungstoleran - angle --18-- or special circuits must to the Aldmmulation of the situation the speedometer index --16th -- outside of the Ausgangsadreßbereiehs to be used. It knows also a reliability marking to the Taktierung on the plate --11-- to be even attached, as later still in connection with Fig. 7 besehrieben becomes. In addition the output address ranges can have to catch-lengthen different within a zone over -. The geometrical form of the data sector, the servo sector, the Ausgangsadreßbereiehs and their appropriate functions is described in the following, whereby the representation of the relationship of the extent situation of the plate--11-- to the wedge --20-- particularly one stresses. Each plate --11-- is divided into four recording volumes with different radius. The outside volume --A-- consists of the Aufzeiclmungssektoren --A0 to A13-- and the largest radial expansion has. The next volume --B-- the next larger radial expansion has, --C-- a smaller expansion has and --D-- (radially the volume lying furthest inside) the smallest radial expansion has. After representation in Fig. 3 is conditions --5, 6, 7 and 8-- for --D, C, B and A--. The relationship of the radial expansions is preferred most strongly in such a way that see a maximum data communication in a virtual memory system from results in that the radial movements of the head are kept as small as possible. In each Anfzeiehnungsband all signals are radially aligned, i.e. each signal has the same angle address in each trace. In the volume--A--can e.g. 455 traces lie, from which each contains 16000 signals. Each signal of the beginning of the sector --A1-- as is the case for NO up to the end of the data sector as --24-- winkelig identically addressed like it today with disk files to a volume usually is. In similar way the zones have --B, C and D-- their own clear angle addressing, represented by the symbols Nja, Njb, Njc and Njd, whereby N the Winkelversehiebungund the indices means, jb etc. that the angle for each zone is clear. Each sector in the same volume has however the same Winkelverschiebnng. For the angular addressing of the sectors all computations are based on the speedometer index --161--, as it for each plate --11-- is calibrated. The radial reliability line --17-- a angle index number has emergency. Since emergency for all volumes is alike, it forms the reliability mark for all signals on each of the plates --11--. During see the plate --11-- toward the arrow --25-- , re-paints over a trace in the volume turns --A-- scanning head --26-- after occurance of of the radial reliability line--17-- a Lösehitlcke--27--. Then it steps into the sector servo signal range--28-- , that in a given angle NO of the speedometer index --161 -- is transferred. This sector servo signal range --28-- has the same point of reference for all volumes of signals. The mutual relationship of the sector servo signal range --28-- and the other sector servo ranges, those in Fig. 3 is represented by the hatched ranges as--30 to 40--and the unnumbered hatched ranges can be developed according to the US-PS No. 3.185, 972. With the invention can be used each Spurbezeiehnungsmuster, trace servo trace and localization sample. During the angle addressing for the zone --A--, whereby the description accordingly for the zones --B to D-- , is the data beginning is valid in the first sector of each zone --A1 to DL-- indicated by the angle address No. the distance between the Sektorbereieh --28-- and NO is a Löschlüeke (some signal bundle of the type IBG to be can). The angular dimension of the data area is Nja, whereby the angle address NO + Nja the data end as --24-- indicates. The Sektorservobereieh --30-- and the gap up to the data end --24-- and a further gap up to the data beginning --42-- for the sector --A2-- measured by the Winkelversehiebung Mja. The data beginning for the sector --A2-- thus the Winkelverschiebung NO is + Nja + Mja. For the data beginning in each sector the Winkelverschiebung lp is fixed by the following equation: Lp = NO Ik-1) (Nja ÷ Mja) the understanding equation is valid for sector for that k-ten. The data end for that is accordingly k-ten sector, designation with OD, given by the following equation: OD = NO + (k-l) (Nja + Mja) + Nja in Fig. 4 circuits shown solve the two above equations for leading the data signals to the Datenverarbeitungsschalüzugen and for leading the servo signals from the servo sectors --28 and 30 to 40-- to its descriptive servo circuits, each data section--A1 to DS-- an identical tangential length at the internal radius of the appropriate volumes has. Thus storage is facilitated of data signal block with firm length in each segment. After bek nth Verwa [tungsalgorythmen for virtual memory space is substantially simpler the administration of block with firm length than that of block with variable length. In addition by this arrangement storage on a disk surface is maximised; while the range of the read back signals is limited, the Frequenzahwe is steered chung from the internal to the extreme position of the volumes. The output address sectors --A0, B0, CO and D0--, of which everyone can have a variable length, two functions supply in each section as --50 for A0, 51 for B0, 52 for CO and 53 for D0--. Ineinem first part the recording track designation and Steueriuformatien stored as for instance information for the designation of bad sectors and for the designation of the zone. A recording part contains other ZustandsLuformation, like it for Verfügbarkeitsund of reliability purposes to be used kanu. The ranges --50 to 53-- lie directly beside the last servo sections --38, 39, 40 and 40A--, around a maximum tolerance for the acceptance of the tolerance angle --18-- between the rear part of the Ha-Berichtsbereiehs--52-- to make possible, most closely to the Zuverlässi keitsllnie--17-- lies, means it is desired, the tangential counter up to the completion of reading the control information in the ranges--50 to 53-- to reset. The length of the recordings--50 to 53--is given, so that the speedometer number for each of the zones is given for switching the Datenverarbeitungssehaltungen off, around the Abfiiblen of the reliability line --17-- to prepare. The angular displacement between the ranges --50 to 53-- and the reliability line --17-- is independent for each zone and in accordance with later description one stores. While in Fig. i represented Ausfährungsbeispiel a separate Taehometerplatte for the production of a speedometer reference --16-- for measuring of the format places in all plates --11-- , exists another solution shows in the arrangement of the speedometer information at the outside extent of the plate --11-- as for instance in a data area --55--, which can consist of one or more information traces. In this in connection one can follow the general Ausf'ührungen in the US-PS mentioned above, which were connected more completely later in with Fig, 7 are described. Another important criterion in Fig. 3 recording format shown is the accumulation of the radial discharge of rotating disk memories as well as the accumulation of orthogonalen creeping in flexible media. The problem mentioned first is based on the storage, the wear and the eccentricities, which develop during the production, whereby low track densities to for example about 200 traces per tariff do not know such eccentricities and a running out as ernsihaftes problem. If one wants to note however 1000 traces per tariff and more, kanu such a running out a problem become. The Mirr destabstand from a trace to the other one amounts to with 1000 traces per tariff 0, 001 tariff. If a Schutzband lies between neighbouring traces, then the total track width is more near with 0,005 tariff. Since magnetic Übeßrager has one completely certainly reduced Empfindlicbkeitsamplitude and the transmission gap pays off less than the half trace, the genuine tolerance for the discharge is substantially smaller than the actual track width. From there it is of great importance that the trace subsequent system for the transducer pursues the traces exactly and reliably. While the traces were pursued so far by data signals, this Spurverfolgnng is practically not possible, because the energy content of such signals is too low with high track densities. Thus improved trace pursuit procedures must be developed. In case of the flexible media the substrate exists of more flexible resin such as polyesters, Celluloseacetat and dgLSolche materials often changes its form in the run the time, that is the so-called viscoelastische effect as well known. With polyester the changes of measure can differ in an axle even substantially from those in a transverse axis. It will angenomrùen that to the production process is to due, in which the Polyesterfihn by a roller is manufactured. This production induces anisotropic tensions in the film, which result in orthogonal different changes of measure. If a recording plate --11-- such a substrate contains, is due to these NIaßänderungen the slab mould no longer kreis£6rmig separates easily elliptically. With a plate of 15 tariff diameter for example amounts to the difference into the 5Ia/changes about 0.002 tariff. Solehe Maßinstabilit lten the statics per revolution of the plate --11-- are dynamic over long time and result in problems pray the Spurverfolgang. The invention offers a solution of this problem by application of the Sektorservoteehnik, around an essentially constant distance between neighbouring servo sectors as for instance to the sectors --28 and 30--to keep. The deviation to the extent extent between the servo sectors--28 and 30--is only slightly larger at the external radius at the grölen, but than the minimum distance at the internal radius. The largest Umfaugsabstand bestiramt by the Servoanspraehe and their possibility of predicting changes in the density from a trace to the other one as well as the alteration rate of the trace of a pure circle configuration. With the selection of a format after the invention thus not only the minimum tangential distance for each data sector, but aueh the gröle extent length for each sector, must be selected measured between the effective center of two neighbouring Seryosektoren. For the sake of simplicity a data block preferably between two Sektorservos held although also additional servo sectors within a Datenb [ocks to be versehaehtelt to be able. In Fig. 4 shown equipment is to the work with in Fig. 3 represented disk format develops, that in Fig. 1 equipment shown is used. The Taktierung of the operations in Fig. 4 of equipment shown is in Fig. 7 shown, the trace formats is in the Fig. 5 and 6 represented. During the description it is accepted that the Kopfstellgtied --60-- the Kopftr gerarm --61-- thus it placed that the transducer head --62-- according to the head --26-- in Fig. 3 a desired trace which can be addressed scans. The description begins with the Photofiihlereinheit --63--, those the Ta hometerindexmarkierung--16-- and a Taehometerindexsignal senses --63A-- over the line --64-- supplies, in order to reset the Winkelpositionsfühlsehaltung and the gate circuit, to which also the resetting of the Winkelpositionszäblers --65--, the angle address register --66-- and the buffer register --67-- heard. In addition the Vorindex Flip Fiop becomes --68-- switched into the active condition and indicated that the transducer --62-- that RST-see-hurry before the disk radial index line --17-- scans, which best in Fig. 3 to see is, those between the line --16 ' -- , those runs the angle position of the speedometer index mark --16-- to the radial index line --17 -- designated. A Vorindex Flip flop --68-- prepares and element --69-- so forwards that it responds to a signal, which the Abfiüblung of the disk radial index line --17-- and a disk index signal indicates --75-- over the line --74-- supplies. The disk index signals and other control signals become at the beginning by the transducer --62-- produced, that by in Fig. 3 format shown of represented signals ihlt off and it over the line --70-- at Servound data signal disconnecting switch --71-- and the cladding detector --72-- gives. Servound data signal disconnecting switch--71-- supplies the separated servo signals to the head control member --60--, around the transducer --62-- to let scan the addressed trace reliably. In addition the Treuner supplies --71-- the separated data signals to the Datenverarbeitungssehaltungen --73-- to the processing in well-known way. The technology of the data processing circuits does not have a meaning for the invention and dahernieht besehrieben. The cladding detector --72-- supplies with receipt from the transducer--ö2-- according to the slat radial index line --17--produced signal an active signal to and element --69--° by the Vorindex Flip Fiop --68-- is preparatory, around the signal of the Hülidetektor--72-- on the line --74-- as disk index signal --75-- to pass on. That corresponds to the time, at that the transducer--62-- the line --17-- fills up. The disk index signal--75--prepares and elements --80-- forwards, around signal contents of the angle location counter --65-- on the adder--81-- to lead and the normalization of contents of the Winkeladreßregtsters --66-- to prepare for the zone, in that the transducer --62-- a given trace scans. The photo feeler unit--63-- feels the speedometer marks--84-- off and Taehometersignale supplies for the increase of contents of the angle location counter --65--. If the disk index signal --75-- , are contents of the angle location counter arise --65-- equal NO, the geeiehte transfer between Taohometerindex --16-- and radial reliability line --17--. This contents become by the adder --81-- on the Pufferreglster --67-- led and so sliding into the angle angle --66-- prepared. Inserting this contents into the angle angle --66-- becomes now besehrieben. The disk index impulse --75--on the line--74-- also the servo time trigger flip-flop places--82-- back. Reset this supplies a unity stop signal over the complement outlet line --83-- and scolded dadureh the servo time trigger, i.e. this works as mono-stable multivibrator. A negative impulse becomes thus over the line --84-- to the address register --86-- the read-only memory --85-- supplied. A position of this register --86-- it indicates whether the head --62-- Servo signals or data signals scans. This indicator signal becomes over the line --87-- to --ROM 85-- led, around the servo data disconnecting switch --71-- and the Datenverarbeitungssehaltung --73-- to address. In addition it works as inquiry for pushing in signals in the buffer register --67-- and the angle address register --66--. Of and elements --80-- to the adder --81-- (NO) led signals become from here at the buffer register --67-- and the angle address register --66-- led. This procedure l iuft so fast off that the angle location counter --65-- not yet behind the Taehometerzahl NO counted. The digital Vergleieherschaltung --88-- thus a successful Vergleiehssignal shows on the line --89-- on and triggers the servo time trigger --82-- into the reset condition, so that no Servozeß is indicated. In addition scolded the disk index signal --75-- on the line --74-- the postindex flip-flop --90-- into the active condition, whereby binary unity into the address register --86-- one forces. In accordance with the following table of addressing those end of address register --86--one of the nine Registerim --ROM 85--. The addresses are specified in the left column, whereby they designate the X-normal conditions and contents of the registers correspond in were connected with Fig. 3 defined Winkelverschiebungen. The middle symbol-designates the zone, the left symbol the activity of the postindex flip-flop and the right symbol the activity of the servo time trigger. Each time trigger --82-- becomes by a signal on the line--89-- getriggeß and as mono-stable multivibrator for the duration of the servo time one operates, so that appropriate numeric contents of the registers by the adder --81-- on the buffer register --67-- and the WinkeladrcBregister --66-- one leads. ROM table of addresses address contents of 0XX 1AO lA1 1B0 l] ql ICO ICl IDO IDI IWo Nja Mja Njb Mjb Mjc Njd Mjd each time, if the servo time trigger --82-- by the Vergleiehersehaltung --88-- , become signal contents of the address register are compared of the --ROM 85--, as it by the register --86-- one indicates, to the adder --81-- transferred, there to contents of the angle address register --66-- added, in order to bring the angle address for the next data section or the next servo section depending upon situation on the newest conditions. The above procedure is repeated for the duration of the trace. The renewed occurrence of the speedometer index signal on the line --64-- the angle addressing of the trace starts again and calibrates it again. Also with error conditions thus an automatic resumption takes place because of the new measuring after the invention. The servo time trigger --82-- at the beginning of each data signal set and each servo signal set one triggers. From Fig. 3 it is to be seen that this at the beginning or at the front edge part of the servo section --28-- defined as Mja as well as at the beginning of the data section for a unity as with NO takes place. That--ROM-- leading memory can be developed, mechanical plug-in board or electrically adjustable flip-flops and such as capacitive memory. Triggering the servo time trigger --82-- lets itself at good out the Fig. 7 from linewith the inscription the servo time belts --A to D-- seen, where each impulse two triggers of the trigger --82-- , one corresponds at the beginning of the impulse --28-- and one at its end. In Fig. 5 is shown the dimensions of a trace in form of a Diagrgmms. The upper trace --100-- a trace lying radially inside is, the lower trace --101-- radially outside a lying trace. It is to be noted that the linear expansion of the servo ranges --102-- is smaller than any expansion of the servo range --103--. Both servo ranges --102 and 103-- include the same angle in the zone. In similar way the data area has --104-- a shorter linear would lie than the data area --105--, while also they include the same angle. After well-known disk read techniques the read circuits adapt thus to different linear Läugen to the enterprise with different frequencies, are called the Oberflächengesohwindigkeit of the plates in the different radial positions are different and lead to a different linear length. For the successful enterprise it is important that different Servound of data divisions essentially includes the same angle. In some traps the servo parts can the same linear length exactly have and by it different angles include. In this case the deletion hurry or block spaces changes how --106 and 107-- and such differences adjust. Fig. 6 shows in a diagram the signal arrangements within a data section as --104 and 105-- in Fig. 5. That front part is a clock synchronisation range --110--, a sector --ID-- Section --SID 111-- and a IBG Synchronisationsteil follows this. Actual Datenund error correcting code follows within a range --113--. The range --113-- locked additional synchronisation signals before the servo range by one delete-hurry or. The use of deletion ILS is in as much desired as then different Datenläugen in sectors with firm length can be noted. The broken line --114-- e.g. it indicates that a recording with small length took place. In a preferred mode of operation the range between the data end becomes --114-- and the end of the data sector part --115-- with filling signals like loud zeros more oderlauter one or a certain sample gefiillt, which indicate the replenishment. Such a filling up sample can consist also of a series of wave trains, which are longer than the wave trains, which arise in the data in the Fehlerkorrektureode recording. The Servosignaiund data signal disconnecting switch --71-- a relatively simple circuit can be, like it in Fig. 8 shown is. Signals of the transducer --62-- accordingly strengthened to a synchronous Demodufatorschaltung--120-- supplied, those by an oscillator --121-- with variable frequency synchronis [, that is ert likewise of on the line --70-- received input signal is dependent. The expenditure of the demodulator attitude --120-- becomes to a pair analog members or AND elements--122und 123-- led, those by over the line--87--received signal to be alternating operated. And element --122-- responds, if the signal on the line --87-- runs negatively and leads data signals to the data processing circuits --23--, and and element --123-- speaks on the positive process of the signals on the line --87-- on and leads servo signals to the head control member --60--.