Samsung Electronics Co., Ltd.

Sung Wook Ryu

Yang Seok Ki

Ehsan M Najafabadi

Dong Gi Daniel Lee

Changho Choi

A storage device, and a method for operating a storage device. In some embodiments, the storage device includes storage media, and the method includes: determining, by the storage device, that the storage device is in a fault state from which partial recovery is possible by operating the storage device in a first read-only mode; and operating the storage device in the first read-only mode, the operating in the first read-only mode including: determining that the age of a first data item stored in a page of the storage device has exceeded a threshold age, and copying the first data item into a rescue space in the storage device.

Storage device with fault resilient read-only mode

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.

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Palo Alto, CA, United States of America

Sung Wook Ryu