EP0488782A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Data writing during process of data restoration in array disk storage system
Assignee: Fujitsu Ltd
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Filing: 1991-11-29
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Granted: —
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Expires: 2011-11-29
Abstract
Abstract In an array disk storage system, when a fault occurs in one of a plurality of regular disk storages (10,11,...1n) or a disk storage (2) for parity, restored data generated from data stored in the remaining functioning disks is written to a spare disk storage (3), and the restored data is copied to a new disk storage which has replaced the faulty disk (12). The writing of new data is carried out such that new data is written to both the spare disk storage (3) and the new disk storage to which a writing of the restored data from the spare disk storage is being carried out, in response to an instruction from an upper grade device (5) to write the new data.
Inventors
- 👤 Yumiko c/o FUJITSU LIMITED Ohizumi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:54
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/08; G06F11/10; G06F11/1076; G06F11/1092; G06F3/00; G06F3/06; G06F3/0601; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1833; G11C; G11C29/00; G11C29/70; G11C29/88; G06F3/0668; G06F3/0671; G06F3/0673
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
A method of writing data to disk storage in an array disk storage system during a process of restoring data in said disk storage; said array disk storage system including a plurality of regular disk storage for storing data, a spare disk storage used when a fault occurs in the disk storage, and a control device for controlling an input and output of data to and from the disk storage under a control of an upper grade device; when one of the plurality of regular disk storage or the disk storage for parity becomes faulty, restored data generated from the data stored in the remaining functioning disks is written to the spare disk storage, and the restored data is copied to a new disk storage which has replaced the faulty disk storage; characterised in that when writing of new data is carried out that new data is written to both the spare disk storage and the new disk storage to which writing of the restored data from the spare disk storage is being carried out, in response to an instruction from the upper grade device to write the new data.
Claim 2
Independent Claim
192 words
An apparatus for writing data into disk storage in an array disk storage system during a process of restoring data in disk storage; said apparatus comprising: a plurality of regular disk storage (10,11,...1n) to which data is to be written; a disk storage (2) for parity to which parity data generated from the data written to the regular disk storage (10,11,...1n) is to be written; a spare disk storage (3) to which restored data generated from the data read from functioning disk storage is to be written when a fault occurs in one (12) of the regular disk storages or the disk storage for parity; and, control means (4) for controlling an input and output of data to and from the disk storages (10,11,...1n), under the control of an upper grade device (5); characterised in that the control means (4) comprises means for writing new data to both the spare disk storage (3) and a new disk storage (NEW DSK) to which a writing of restored data from the spare disk storage (3) is carried out, in response to an instruction from the upper grade device (5) to write the new data.
Claim 3
Dependent Claim
95 words
An apparatus according to claim 2, wherein said control means (4) includes a channel interface circuit (41) connected to an upper grade device (5); a device (42) for data distribution, parity data generation and parity check connected to said channel interface circuit (41); an error checking and correction circuit (43) connected to said data distribution device (42); a non-volatile storage (44) connected to said data distribution device (42); a control portion (45) connected to said channel interface circuit (41) and data distribution device (42); and a storage portion (46) connected to said control portion (45)
Claim 4
Dependent Claim
33 words
An apparatus according to claim 3, wherein said error checking and correction circuit (43) is connected to regular disk storages (10,11,...1n), the disk storage (2) for parity, and the spare disk storage (3).
Claim 5
Independent Claim
189 words
A method of writing data into disk storages in a multi-volume data storing system, said multi-volume data storing system including a plurality of disk storage for storing data, a spare disk storage for use when a fault occurs in the disk storages, and a control device for controlling an input and output of data at the disk storage, when one of the plurality of disks becomes faulty, data restored from data stored in the remaining functioning disks is written to the spare disk storage, and the restored data is copied to a new disk storage which has replaced the faulty disk storage, characterised in that when writing of new data is carried out that new data is written to both the spare disk storage and the new disk storage to which writing of the restored data from the spare disk storage is being carried out, in response to an instruction for a writing of the new data through the control device, without determining whether the region to which the new data is to be written is a region to which the writing of the restored data has been completed.
References Cited (Backward Citations)
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