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1. WO1997027587 - EARLY WARNING FOR BOUNDARY POSITION IN SERPENTINE RECORDING

Publication Number WO/1997/027587
Publication Date 31.07.1997
International Application No. PCT/US1997/001440
International Filing Date 24.01.1997
Chapter 2 Demand Filed 26.08.1997
IPC
G06F 3/06 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
06Digital input from, or digital output to, record carriers
G11B 5/008 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
008Recording on, or reproducing or erasing from, magnetic tapes or wires
G11B 5/012 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
012Recording on, or reproducing or erasing from, magnetic disks
G11B 5/54 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads relative to record carriers
54with provision for moving the head into, or out of, its operative position or across tracks
G11B 5/55 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads relative to record carriers
54with provision for moving the head into, or out of, its operative position or across tracks
55Track change, selection, or acquisition by displacement of the head
G11B 5/584 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads relative to record carriers
58with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
584for track following on tapes
CPC
G06F 3/0601
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
06Digital input from or digital output to record carriers ; , e.g. RAID, emulated record carriers, networked record carriers
0601Dedicated interfaces to storage systems
G06F 3/0607
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
06Digital input from or digital output to record carriers ; , e.g. RAID, emulated record carriers, networked record carriers
0601Dedicated interfaces to storage systems
0602specifically adapted to achieve a particular effect
0604Improving or facilitating administration, e.g. storage management
0607by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
G06F 3/0613
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
06Digital input from or digital output to record carriers ; , e.g. RAID, emulated record carriers, networked record carriers
0601Dedicated interfaces to storage systems
0602specifically adapted to achieve a particular effect
061Improving I/O performance
0613in relation to throughput
G06F 3/0614
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
06Digital input from or digital output to record carriers ; , e.g. RAID, emulated record carriers, networked record carriers
0601Dedicated interfaces to storage systems
0602specifically adapted to achieve a particular effect
0614Improving the reliability of storage systems
G06F 3/0619
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
06Digital input from or digital output to record carriers ; , e.g. RAID, emulated record carriers, networked record carriers
0601Dedicated interfaces to storage systems
0602specifically adapted to achieve a particular effect
0614Improving the reliability of storage systems
0619in relation to data integrity, e.g. data losses, bit errors
G06F 3/0644
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
06Digital input from or digital output to record carriers ; , e.g. RAID, emulated record carriers, networked record carriers
0601Dedicated interfaces to storage systems
0628making use of a particular technique
0638Organizing or formatting or addressing of data
0644Management of space entities, e.g. partitions, extents, pools
Applicants
  • EXABYTE CORPORATION [US]/[US]
Inventors
  • HARTUNG, Steven, F.
  • AYERS, Mark, R.
Agents
  • BURNAM, H., Warren, Jr.
Priority Data
60/010,68026.01.1996US
60/010,68126.01.1996US
60/010,68226.01.1996US
60/010,68326.01.1996US
60/010,69326.01.1996US
60/010,69526.01.1996US
60/034,09230.12.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) EARLY WARNING FOR BOUNDARY POSITION IN SERPENTINE RECORDING
(FR) DETECTION PRECOCE DE LA POSITION DE LIMITES DANS UN ENREGISTREMENT EN SERPENTIN
Abstract
(EN)
A serpentine recording arrangement for use with a magnetic tape (32), in which a warning marker (CEW) is generated and recorded. The warning marker (32) indicates that the head (100) is approaching a boundary position on the tape (32) at which the head (100) must change tracks to continue recording or reading frames. The warning marker (32) is preferably included in the auxiliary portion of some tracks and can have a value indicating the number of frames that can be recorded before reaching the boundary position. The warning marker (CEW) is monitored to determine the need to cache data before track changing. Caching data can be initiated by a host (66, 68) or internal to the drive in which case the related speed between the tape (32) and the head (100) can be adjusted in anticipation of track changing.
(FR)
Système d'enregistrement en serpentin destiné à une bande magnétique (32), dans lequel une marque de signalisation est générée et enregistrée. La marque de signalisation (32) indique que la tête (100) est en train d'approcher d'une position limite sur la bande (32) où la tête (100) doit changer de piste, afin de continuer à enregistrer ou lire des trames. La marque de signalisation (32) est, de préférence, placée dans une portion auxiliaire de certaines pistes et elle peut avoir une valeur indiquant le nombre de trames qui peuvent être enregistrées, avant d'atteindre la position limite. La marque de signalisation est surveillée pour déterminer s'il est nécessaire de mettre les données en antémémoire avant de changer de piste. La mémorisation des données en antémémoire peut être amorcée par un hôte (66, 68) ou être interne à l'unité de commande, auquel cas la vitesse relative entre la bande (32) et la tête (100) peut être ajustée en anticipation du changement de piste.
Also published as
Latest bibliographic data on file with the International Bureau