Read channel throughput management
View Patent ↗An implementation of a system disclosed herein provides a method of deferring decoding of a data sector received at a read channel of a storage device, in response to determining that a data sector cannot be decoded by a first decoder and storing the data sector for further processing by a second decoder.
1. A method comprising:
deferring decoding of a data sector received at a read channel of a storage device, in response to determining that the data sector cannot be decoded by a first decoder; and
storing the data sector for further processing by a second decoder running at a clock rate lower than a clock rate of the first decoder.
2. The method of claim 1 , wherein the data sector is read during an aggressive seek read operation.
3. The method of claim 2 , further comprising:
decoding the data sector using the second decoder.
4. The method of claim 1 , further comprising:
communicating a signal to a formatter indicating the deferring of decoding the data sector; and
reading an ensuing data sector following the deferred data sector.
5. The method of claim 4 , further comprising:
communicating a signal from the formatter to a platform buffer manager (PBM) to indicate the deferring of decoding the data sector; and
updating a virtual buffer manager (VBM) link at the PBM to transfer the ensuing data sector from the formatter.
6. The method of claim 1 , further comprising:
determining a decoder output based on decoding of a number of initial data sectors at the read channel; and
determining processing of the ensuing data sectors based on analyzing the decoder output using a criterion.
7. The method of claim 6 , wherein the decoder output is a percentage of the initial data sectors for which the decoding resulted in a converged decoder output and the criterion provides a threshold percentage.
8. The method of claim 1 , further comprising analyzing a number of read operations during an aggressive seek operation to generate a servo performance measure indicating a percentage of recoverable data sectors.
9. The method of claim 8 , further comprising communicating the servo performance measure to a servo controller of the storage device.
10. The method of claim 9 , further comprising adjusting the speed of reading data from the storage media by the aggressive seek read operation based on the servo performance measure.
11. A storage device, comprising:
a read channel configured to store a data sector after determining that the data sector cannot be decoded by a first decoder using a predetermined number of iterations of the first decoder, the read channel further configured to decode the stored data sector using a second decoder, wherein the second decoder runs at a clock rate lower than a clock rate of the first decoder.
12. A storage device, comprising:
a read channel configured to store a data sector after determining that the data sector cannot be decoded by a first decoder using a predetermined number of iterations of the first decoder, and wherein the read channel is further configured to communicate a signal to a formatter indicating decoding deferment of the initial data sector and to read an ensuing data sector following the deferment.
13. The storage device of claim 12 , wherein the data sector is a data sector read during an aggressive seek read operation.
14. The storage device of claim 12 , further comprising an analysis module configured to analyze a percentage of decoded data sectors over a number of aggressive seek read operations to generate a servo performance measure.
15. The storage device of claim 12 , wherein the formatter is configured to communicate the signal to a platform buffer manager (PBM) to indicate the decoding deferment of the initial data sector.
16. The storage device of claim 15 , wherein the PBM is configured to update a virtual buffer manager (VBM) link to transfer the ensuing data sector from the formatter.
17. The storage device of claim 14 , wherein the analysis module is further configured to communicate the servo performance measure to a servo controller of the storage device.
18. The storage device of claim 14 , further comprising:
a servo controller configured to adjust a speed of reading data from the storage media based on the servo performance measure.
19. The storage device of claim 12 , wherein the read channel is configured to determine a decoder output based on decoding the initial data sector and determine processing of the ensuing data sector based on an analysis of the decoder output using a criterion.