Patent EP0360123A2 successfully refreshed from Google Patents.
EP0360123A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Super-large capacity data storage drive
Assignee: Hitachi Ltd
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Filing: 1989-09-11
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Granted: —
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Expires: 2009-09-11
Abstract
Abstract A fast access high capacity data storage system includes a disk-based storage system employing a plurality of storage surfaces (2). Selected storage surfaces of the plurality thereof include a plurality of data access heads (4) in data communication therewith. Means (6) is provided for allowing concurrent data transfers through this plurality of data access heads (4). Performance is further improved by monitoring frequently accessed data records and transferring them to recording surfaces less frequently in use. Means (48, 49) is also taught for moving the data access heads (4) of the plurality to other recording surfaces (2) to decrease access bottle-necks thereon.
Inventors
- 👤 Hiroshi Yasuoka
- 👤 Yoshito Tsunoda
- 👤 Takeshi Maeda
- 👤 Yoshihisa Kamo
- 👤 Hiromichi Fujisawa
- 👤 Zenji Tsutsumi
- 👤 Shunichi Torii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 15:40
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G06; G06F; G06F3/00; G06F3/06; G06F3/0601; G11B21/00; G11B27/00; G11B27/10; G11B27/102; G11B27/105; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B5/5569; G11B5/5578; G06F3/0668; G06F3/0671; G06F3/0673; G11B2220/00; G11B2220/20; G11B2220/40; G11B2220/41; G11B27/36
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
126 words
A fast access high capacity data storage system comprising: a plurality of generally disk-shaped recording surfaces (2), a first plurality of data access heads (4) in generally close proximity with a first disk-shaped recording surface (2) of the plurality thereof, whereby each data access head of the first plurality is adapted for data communication with the first disk-shaped recording surface, means (5) for independently positioning each data access head (4) of the first plurality in relation to the first disk-shaped recording surface (2) of the plurality thereof, at least one data access head (4) in generally close proximity with each remaining generally disk-shaped recording surface (2) of the plurality thereof, and control system means (6) for selectively communicating data records with each data access head (4).
Claim 2
Dependent Claim
126 words
A fast access high capacity data storage system comprising: a plurality of generally disk-shaped recording surfaces (2), a first plurality of data access heads (4) in generally close proximity with a first disk-shaped recording surface (2) of the plurality thereof, whereby each data access head of the first plurality is adapted for data communication with the first disk-shaped recording surface, means (5) for independently positioning each data access head (4) of the first plurality in relation to the first disk-shaped recording surface (2) of the plurality thereof, at least one data access head (4) in generally close proximity with each remaining generally disk-shaped recording surface (2) of the plurality thereof, and control system means (6) for selectively communicating data records with each data access head (4).
Claim 3
Dependent Claim
45 words
The fast access high capacity data storage system of claim 1 further comprising: means for securing each disk-shaped recording surface (2) to a common spindle (1), and means (3) for rotating the common spindle (1) in relation to each of the data access heads (4).
Claim 4
Dependent Claim
128 words
The fast access high capacity data storage system of claim 2 wherein the control system includes a data supervision system including: means for recording at least one of (a) address data representative of an address to which a data record is written, (b) record length data representative of a length of a data record, (c) transfer timing data representative of a duration necessary for transferring location of a data record, and (d) access timing data representative of a number of accesses to a data record; average computing means for computing an average of at least one of a plurality of recorded address data, record length data, write timing data, and access timing data; and means for storing data representative of an average computed by the average computing means.
Claim 5
Dependent Claim
30 words
The fast access high capacity data storage system of claim 2 wherein the control system includes means for concurrently communicating data records with a selected subset of the access heads.
Claim 6
Dependent Claim
42 words
The fast access high capacity data storage system of claim 3 wherein the control system further includes means for writing directory data to a directory data storage area concurrently with a writing of a data record in accordance with a computed average.
Claim 7
Dependent Claim
71 words
The fast access high capacity data storage system of claim 1 wherein at least one of the plurality of recording surface include a copy recording surface, and wherein system further includes: a second plurality of data access heads, distinct from the first plurality, in close proximity to the copy recording surface; and means for independently positioning each of the second plurality of data access heads relative to the copy recording surface.
Claim 8
Dependent Claim
96 words
The fast access high capacity data storage system of claim 6 further comprising: means for calculating a rate of access to data records stored on selected recording surfaces; means for storing data representative of a preselected acceptable rate of accesses to records stored on selected recording surfaces; copy data comparison means for comparing a calculated rate of access of a selected record to the data representative of a preselected acceptable rate of access; means for selectively copying a data record to the copy recording surface in accordance with an output of the copy data comparison means.
Claim 9
Dependent Claim
139 words
The fast access high capacity data storage system of claim 1 wherein the control system means includes means for selectively communicating data to a secondary data storage device, and wherein the system further comprises: a control unit for controlling a secondary data storage device; means for storing data representative of a total capacity of the plurality of recording surfaces; means for means for calculating data representative of available storage capacity of the plurality of data storage surfaces; means for storing data representative of a least recently used data record stored on the plurality of data storage surfaces; means for comparing the data representative of available storage capacity for the data representative of total storage capacity; and means for selectively transferring a least recently used data record from the plurality of data storage surfaces to the secondary data storage device.
Claim 10
Dependent Claim
47 words
The fast access high capacity data storage device of claim 1 further comprising means for selectively moving a data access head from the first plurality to be in close proximity with a second surface of the plurality of surfaces so as to be in data communication therewith.
Claim 11
Independent Claim
97 words
A method of data storage comprising the steps of: independently positioning each data access head of plurality data access heads in relation to a first generally disk-shaped data recording surface of a plurality thereof; positioning at least one data access head in relation to remaining recording surfaces of the plurality thereof; rotating the plurality of recording surfaces in relation to each of the data access heads; and simultaneously communicating data records with a selected subset of data access heads, such that concurrent data record communication between data access heads and at least one recording surface is achieved.
Claim 12
Independent Claim
97 words
A method of data storage comprising the steps of: independently positioning each data access head of plurality data access heads in relation to a first generally disk-shaped data recording surface of a plurality thereof; positioning at least one data access head in relation to remaining recording surfaces of the plurality thereof; rotating the plurality of recording surfaces in relation to each of the data access heads; and simultaneously communicating data records with a selected subset of data access heads, such that concurrent data record communication between data access heads and at least one recording surface is achieved.
Claim 13
Dependent Claim
109 words
The method of claim 10 further comprising the steps of: recording at least one of (a) address data representative of an address to which a data record is written, (b) record length data representative of a length of a data record, (c) transfer timing data representative of a duration necessary for transferring location of a data record, and (d) access timing data representative of a number of accesses to a data record; computing an average of at least one of a plurality of recorded address data, record length data, write timing data, and access timing data; and storing data representative of an average computed by the average computing means.
Claim 14
Dependent Claim
33 words
The method of claim 11 further comprising the steps of: writing directory data to a directory data storage area concurrently with a writing of a data record in accordance with a computed average.
Claim 15
Dependent Claim
97 words
The method of claim 11 further comprising the steps of: independently positioning each of second plurality of data access heads relative to a copy recording surface; calculating a rate of access to data records stored on selected recording surfaces; storing data representative of a preselected acceptable rate of accesses to records stored on selected recording surfaces; comparing a calculated rate of access of a selected record to the data representative of a preselected acceptable rate of access; copying a data record to the copy recording surface in accordance with an output of the copy data comparison means.
Claim 16
Dependent Claim
106 words
The method of claim 11 further comprising the steps of: communicating data to a secondary data storage device; controlling a secondary data storage device; storing data representative of a total capacity of the plurality of recording surfaces; calculating data representative of available storage capacity of the plurality of data storage surfaces; storing data representative of a least recently used data record stored on the plurality of data storage surfaces; comparing the data representative of available storage capacity for the data representative of total storage capacity; and transferring a least recently used data record from the plurality of data storage surfaces to the secondary data storage device.
Claim 17
Dependent Claim
42 words
The method of claim 11 further comprising the step of selectively moving a data access head from the first plurality to be in close proximity with a second surface of the plurality of surfaces so as to be in data communication therewith.
Claim 18
Dependent Claim
235 words
A fast access high capacity data storage system comprising: a plurality of generally disk-shaped recording surfaces: a first plurality of data access heads in generally close proximity with a first disk-shaped recording surface of the plurality thereof; means for independently positioning each data access head of the first plurality in relation to the first disk-shaped recording surface of the plurality thereof; at least one data access head in generally close proximity with each remaining generally disk-shaped recording surface of the plurality thereof; control system means for concurrently communicating data records with a selected subset of data access heads; means for securing each disk-shaped recording surface to a common spindle; means for rotating the common spindle in relation to each of the data access heads; means for recording usage data representative of at least one of (a) address data representative of an address to which a data record is written, (b) record length data representative of a length of a data record, (c) transfer timing data representative of a duration necessary for transferring location of a data record, and (d) access timing data representative of a number of accesses to a data record; average computing means for computing an average of at least one of a plurality of recorded address data, record length data, write timing data, and access timing data; and means for storing data representative of an average computed by the average computing means.
Claim 19
Dependent Claim
235 words
A fast access high capacity data storage system comprising: a plurality of generally disk-shaped recording surfaces: a first plurality of data access heads in generally close proximity with a first disk-shaped recording surface of the plurality thereof; means for independently positioning each data access head of the first plurality in relation to the first disk-shaped recording surface of the plurality thereof; at least one data access head in generally close proximity with each remaining generally disk-shaped recording surface of the plurality thereof; control system means for concurrently communicating data records with a selected subset of data access heads; means for securing each disk-shaped recording surface to a common spindle; means for rotating the common spindle in relation to each of the data access heads; means for recording usage data representative of at least one of (a) address data representative of an address to which a data record is written, (b) record length data representative of a length of a data record, (c) transfer timing data representative of a duration necessary for transferring location of a data record, and (d) access timing data representative of a number of accesses to a data record; average computing means for computing an average of at least one of a plurality of recorded address data, record length data, write timing data, and access timing data; and means for storing data representative of an average computed by the average computing means.
Claim 20
Dependent Claim
63 words
The data storage system of claim 16 further comprising: a data copy recording surface; a second plurality of data access heads, distinct from the first plurality, in close proximity to the copy recording surface; and means for transferring a data record from a first recording surface of the plurality to a second recording surface of the plurality in accordance with the usage data.
Claim 21
Dependent Claim
114 words
The data storage system of claim 16 further comprising: a control unit for controlling a secondary data storage device; means for storing data representative of a total capacity of the plurality of recording surfaces; means for means for calculating data representative of available storage capacity of the plurality of data storage surfaces; means for storing data representative of a least recently used data record stored on the plurality of data storage surfaces; means for comparing the data representative of available storage capacity for the data representative of total storage capacity; and means for selectively transferring a least recently used data record from the plurality of data storage surfaces to the secondary data storage device.
References Cited (Backward Citations)
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