Repeatable runout compensation value generation

A non-transitory computer-readable medium storing one or more sequences of instructions which, when executed by one or more processors, cause performance of:

• for a target track:
• querying, using an external servo target (EST) corresponding to the target track, at least one repeatable runout (RRO) table for a closest track to the target track;
• identifying from the RRO table an ESTx corresponding to the closest track;
• computing a first absolute value of a difference between the EST and the ESTx;
• in response to determining that the computed first absolute value is less than an approximation threshold, determining an RRO compensation value corresponding to the target track based on an RRO compensation value corresponding to the closest track.

A data storage device comprising:

• means for executing machine-executable instructions;
• and
• means for storing one or more sequences of machine-executable instructions which, when executed by the means for executing machine-executable instructions, cause performance of:
• for a target track:
• querying, using a servo position value corresponding to the target track, at least one repeatable runout (RRO) table for a closest track to the target track;
• identifying, from the at least one RRO table for the closest track, a servo position value corresponding to the closest track;
• computing a first absolute value of a difference between (a) the servo position value corresponding to the target track and (b) the servo position value corresponding to the closest track;
• in response to determining that the computed first absolute value is less than an approximation threshold, determining an RRO compensation value corresponding to the target track based on an RRO compensation value corresponding to the closest track.