Seagate Technology Incorporated

Li Xin

Harry Tiotantra

Jeetandra Kella

Xu Huang

Described are systems, devices and methods for regulating speculative reading in a hard disk drive that has a read reliability budget. Regulating speculative reading under a read reliability budget involves selecting an amount of read look ahead (RLA) in response to determining whether or not a read rate exceeds the read reliability budget. When the read rate is lower than the read reliability budget, a full RLA amount can be used, thus ensuring high performance. When the read rate exceeds the read reliability budget, the RLA amount can be adjusted down while maintaining performance at acceptable levels. Adjustments to RLA may be made at periodic intervals, and in response to whether the workload is more sequential or more random.

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Singapore, Singapore

Li Xin