US 2022/0012142 A1Published application

Raid system with fault resilient storage devices

AssigneeSamsung Electronics Co., Ltd.

InventorsSung Wook RYU, Yang Seok KI, Dong Gi Daniel LEE, Changho CHOI, Ehsan NAJAFABADI

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Abstract

A storage system, and a method for operating a storage system. In some embodiments, the system includes a first storage device and a second storage device, and the method includes: determining that the first storage device is in a read-only state and that the second storage device is in a read-write state; performing a write operation, of a first stripe, to the storage system; performing a first read operation, of a second stripe, from the storage system; and performing a second read operation, of the first stripe, from the storage system, wherein: the performing of the write operation includes: writing a portion of the first stripe to the second storage device, and making an entry in a mapping table for the first stripe.

Claims20

Dependent claims

A method for operating a storage system comprising a first storage device and a second storage device, the method comprising:

determining that the first storage device is in a read-only state and that the second storage device is in a read-write state;
performing a write operation, of a first stripe, to the storage system;
performing a first read operation, of a second stripe, from the storage system;
and
performing a second read operation, of the first stripe, from the storage system,
wherein:
the performing of the write operation comprises:
writing a portion of the first stripe to the second storage device, and
making an entry in a mapping table for the first stripe;
the performing of the first read operation comprises reading a portion of the second stripe from the first storage device and the second storage device;
and
the performing of the second read operation comprises:
determining that the mapping table includes an entry for the first stripe, and
reading a portion of the first stripe from the second storage device.

11 more elements

A system for storing data, the system comprising:

a first storage device,
a second storage device, and
a processing circuit connected to the first storage device and to the second storage device,
the processing circuit being configured to:
determine that the first storage device is in a read-only state and that the second storage device is in a read-write state;
perform a write operation, of a first stripe;
perform a first read operation, of a second stripe;
and
perform a second read operation, of the first stripe,
wherein:
the performing of the write operation comprises:
writing a portion of the first stripe to the second storage device, and
making an entry in a mapping table for the first stripe;
the performing of the first read operation comprises reading a portion of the second stripe from the first storage device and the second storage device;
and
the performing of the second read operation comprises:
determining that the mapping table includes an entry for the first stripe, and
reading a portion of the first stripe from the second storage device.

15 more elements

A system for storing data, the system comprising:

a first storage device,
a second storage device, and
means for processing, connected to the first storage device and to the second storage device,
the means for processing being configured to:
determine that the first storage device is in a read-only state and that the second storage device is in a read-write state;
perform a write operation, of a first stripe;
perform a first read operation, of a second stripe;
and
perform a second read operation, of the first stripe,
wherein:
the performing of the write operation comprises:
writing a portion of the first stripe to the second storage device, and
making an entry in a mapping table for the first stripe;
the performing of the first read operation comprises reading a portion of the second stripe from the first storage device and the second storage device;
and
the performing of the second read operation comprises:
determining that the mapping table includes an entry for the first stripe, and
reading a portion of the first stripe from the second storage device.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/109,017Filed 1 Dec 2020
Priority: 13 Jul 2020
Published: 13 Jan 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification32 codes

G06F 11/1428
Reconfiguring to eliminate the error: with loss of hardware functionality
G06F 3/0619
Improving the reliability of storage systems: in relation to data integrity, e.g. data losses, bit errors
G06F 3/0634
Configuration or reconfiguration of storage systems: by changing the state or mode of one or more devices
G06F 3/0644
Organizing or formatting or addressing of data: management of space entities, e.g. partitions, extents, pools

Family

Application63/051,158Us provisional application · filed 13 Jul 2020
Application63/052,854Us provisional application · filed 16 Jul 2020
Application63/057,744Us provisional application · filed 28 Jul 2020
US 11,775,391 B2Related patent
US 2022/0012142 A1This patent

From the US filing history. Foreign family members aren’t listed.