Divya Kundhur Reddy

US Patent:

20170160957, Jun 8, 2017

Filed:

May 17, 2016

Appl. No.:

15/157369

Inventors:

- Plano TX, US
Divya Reddy - Milpitas CA, US
Aaron K. Olbrich - Morgan Hill CA, US

International Classification:

G06F 3/06

Abstract:

Systems and methods disclosed herein allow for efficiently managing unmapped blocks to extend life of solid-state drives. In one aspect, a method includes: determining a quantity of unmapped storage units in the storage device and operating the storage device in a first mode of operation while the quantity satisfies a first threshold. The method also includes: changing to a second mode of operation if the quantity of unmapped storage units doesn't satisfy the first threshold. While operating in the second mode of operation, the method includes: determining whether processing a write command would reduce the quantity of unmapped storage units to a quantity less than a second threshold. If processing the write command wouldn't reduce the quantity of unmapped storage units to a quantity less than the second threshold, the method includes: accepting and processing the write command. Else, the method includes: forgoing acceptance and processing of the write command.

US Patent:

20170160976, Jun 8, 2017

Filed:

May 17, 2016

Appl. No.:

15/157367

Inventors:

- Plano TX, US
Divya Reddy - Milpitas CA, US
Aaron K. Olbrich - Morgan Hill CA, US

International Classification:

G06F 3/06

Abstract:

Systems and methods disclosed herein allow for efficiently managing unmapped blocks to extend life of solid-state drives. In one aspect, a method includes: measuring a level of over-provisioning (“OP”) in a storage device and operating it in a first mode of operation while the OP satisfies a first threshold. The method also includes: changing to a second mode of operation if the OP does not satisfy the first threshold. While operating in the second mode of operation, the method includes: (i) determining an unmapped portion of a declared storage capacity of the storage device; and (ii) determining whether processing a write command would reduce the unmapped portion to less than a second threshold. If processing the write command wouldn't reduce the unmapped portion to less than the second threshold, the method includes: accepting and processing the write command. Else, the method includes: forgoing acceptance and processing of the write command.

US Patent:

20160116968, Apr 28, 2016

Filed:

Mar 25, 2015

Appl. No.:

14/668722

Inventors:

- Milpitas CA, US
Divya Reddy - Milpitas CA, US
Satish Babu Vasudeva - Fremont CA, US
Rakesh Chandra - San Jose CA, US
Rodney Brittner - San Jose CA, US

International Classification:

G06F 1/32
G06F 3/06

Abstract:

Systems, methods, and/or devices are used to manage a storage system. In one aspect, the method includes receiving, from a host to which a storage device of the storage system is operatively coupled, a request to perform a first memory operation on one or more memory devices of the storage device. The method includes determining a count of credits corresponding to the first memory operation. If a current count of credits in the first credit pool is greater than or equal to the count of credits corresponding to the first memory operation and a current count of credits in the second credit pool is greater than or equal to the count of credits corresponding to the first memory operation, the method includes: performing the first memory operation; and decrementing the first and second credit pools according to the count of credits corresponding to the first memory operation.

US Patent:

20160117105, Apr 28, 2016

Filed:

Mar 25, 2015

Appl. No.:

14/668710

Inventors:

- Milpitas CA, US
Divya Reddy - Milpitas CA, US
Satish Babu Vasudeva - Fremont CA, US
Jimmy Sy - Daly City CA, US
Rodney Brittner - San Jose CA, US
Venkatesh K. Paulsamy - Mountain View CA, US

International Classification:

G06F 3/06

Abstract:

Systems, methods, and/or devices are used to manage a storage system. In one aspect, the method includes, during a first time period: maintaining a credit pool for the first time period; limiting bandwidth used for transmitting data between a storage device of the storage system and a host operatively coupled with the storage device according to a status of the credit pool, where the storage device includes one or more memory devices; monitoring a temperature of the storage device; and, in accordance with a determination that a current temperature of the storage device exceeds a predetermined threshold temperature and the current temperature of the storage device satisfies one or more temperature criteria, reducing an initial value of the credit pool for a second time period according to a first adjustment factor corresponding to the predetermined temperature threshold, where the second time period is subsequent to the first time period.

US Patent:

20160117252, Apr 28, 2016

Filed:

Mar 25, 2015

Appl. No.:

14/668690

Inventors:

- Milpitas CA, US
Divya Reddy - Milpitas CA, US
Venkatesh K. Paulsamy - Mountain View CA, US
Satish Babu Vasudeva - Fremont CA, US
Jimmy Sy - Daly City CA, US
Rakesh Chandra - San Jose CA, US

International Classification:

G06F 12/08

Abstract:

A storage device and method enable processing of un-map commands. In one aspect, the method includes (1) determining whether a size of an un-map command satisfies (e.g., is greater than or equal to) a size threshold, (2) if the size of the un-map command satisfies the size threshold, performing one or more operations of a first un-map process, wherein the first un-map process forgoes (does not include) saving a mapping table to non-volatile memory of a storage device, and (3) if the size of the un-map command does not satisfy the size threshold, performing one or more operations of a second un-map process, wherein the second un-map process forgoes (does not include) saving the mapping table to non-volatile memory of the storage device and forgoes (does not include) flushing a write cache to non-volatile memory of the storage device.