EP0061585A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Data processing apparatus with a storage device management facility
Assignee: International Business Machines Corp
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Filing: 1982-02-25
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Granted: —
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Expires: 2002-02-25
Abstract
Abstract Allocation of space of peripheral storage devices 16 to host (10) processes is based upon free or unallocated space in each such device. The device, irrespective of capacity, having the largest free space is most likely to receive a next space allocation. A central record 15 in a multi-host system stores free space indications. In a disk storage device free space is indicated by the number of unallocated data storage record tracks for each such device.
Inventors
- 👤 Harvey Elmer Kamionka
- 👤 Jerry Wayne Pence
- 👤 Dat Minh Tran
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 00:28
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/06; G06F3/0601; G06F12/00; G06F12/02; G06F12/08; G06F15/00; G06F15/16; G06F15/161; G06F3/0602; G06F3/0608; G06F3/0628; G06F3/0629; G06F3/0631; G06F3/0668; G06F3/0671; G06F3/0673; G06F3/0674
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
A data processing system having multiple data storage devices (12) each incorporating its own volume table of contents (16) (hereinafter referred to as a "VTOC"), and accommodating multiple potential users (10) of such devices together with a storage device management facility characterised in that, (a) the management facility maintains (constructs and updates) as a serially reusable resource, a single table (15) recording, for each logically active peripheral storage device, its identity together with a unit measure of its unassigned capacity (VOLID;TRACKS) (b) the management facility responds to a user request for peripheral device storage by searching the table for the device identity (VOLID) associated with the. greatest unit measure of unused capacity (TRACKS), and assigning the so identified device to the requesting user.
Claim 2
Dependent Claim
123 words
A data processing system having multiple data storage devices (12) each incorporating its own volume table of contents (16) (hereinafter referred to as a "VTOC"), and accommodating multiple potential users (10) of such devices together with a storage device management facility characterised in that, (a) the management facility maintains (constructs and updates) as a serially reusable resource, a single table (15) recording, for each logically active peripheral storage device, its identity together with a unit measure of its unassigned capacity (VOLID;TRACKS) (b) the management facility responds to a user request for peripheral device storage by searching the table for the device identity (VOLID) associated with the. greatest unit measure of unused capacity (TRACKS), and assigning the so identified device to the requesting user.
Claim 3
Dependent Claim
51 words
A data processing sysem as claimed in claim 1 including multiple host processors, the management facility being distributed among the host processors and the single table (15) being collectively maintained in commonly accessible storage, writing access to the table being conditional upon the intending host being able to sieze the table.
Claim 4
Dependent Claim
29 words
A data processing system as claimed in claim 1 including a self sequencing single management facility (see Fig. 2) maintaining the single table (15) and having sole access thereto.
Claim 5
Dependent Claim
34 words
A data processing system as claimed in any preceding claim in which the table (16) is maintained in a random access store and is searched by compare and replace logic (62, 63, 66, 67).
Claim 6
Dependent Claim
25 words
A data processing system as claimed in any of claims 1 to 3 in which the table (16) is maintained in a writeable associative store.
Claim 7
Dependent Claim
22 words
A data processing system as claimed in any preceding claim wherein the initializing table entries are obtained from the individual device VTOC's.
References Cited (Backward Citations)
No citation records indexed.
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