Adaptively modifying a read caching algorithm based upon the detection of a vibration state within a rotating media storage device

In a rotating media storage device (RMSD) connectable to a host computer, the RMSD being subject to periods of sustained vibration causing a vibration state to exist and having a disk including at least a first track and a second track, a moveable head, a cache memory and a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations, a method of efficiently switching between a read operation on the first track and either a read or write operation on the second track, the method comprising the steps of:

• monitoring for the existence of a vibration state;
• and
• if a vibration state is detected,
• modifying the read caching algorithm based on the vibration state including:
• eliminating the post-read operation of the first track;
• immediately seeking to the second track;
• and
• performing a portion of the pre-read operation on the second track.

In a rotating media storage device (RMSD) connectable to a host computer, the RMSD being subject to periods of sustained vibration causing a vibration state to exist and having a disk including at least a first track and a second track, a moveable head, a cache memory and a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations, a method of efficiently switching between a read operation on the first track and either a read or write operation on the second track, the method comprising the steps of:

• monitoring for the existence of a vibration state;
• and
• if a vibration state is detected,
• measuring the amount of vibration;
• calculating an amount of post-read to be performed on the first track before seeking to the second track, the amount of post-read being dependent on the measured vibration;
• estimating a read access time to the second track based on the vibration state;
• modifying the read caching algorithm based on the vibration state including adjusting the amount of post-read performed on the first track;
• and
• seeking to the second track.

In a rotating media storage device (RMSD) connectable to a host computer, the RMSD being subject to periods of sustained vibration causing a vibration state to exist and having a disk including at least a first track and a second track, a moveable head, a cache memory and a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations, a method of efficiently switching between a read operation on the first track and either a read or write operation on the second track, the method comprising the steps of:

• monitoring for the existence of a vibration state;
• and
• if a vibration state is detected,
• estimating a read access time to the second track based on the vibration state;
• and
• modifying the read caching algorithm based on the vibration state including:
• eliminating the post-read operation of the first track;
• immediately seeking to the second track;
• and
• performing a portion of the pre-read operation on the second track.

A rotating media storage device (RMSD) connectable to a host computer, the RMSD being subject to periods of sustained vibration causing a vibration state to exist and having a disk including at least a first track and a second track, a moveable head, a cache memory and a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations, the RMSD further comprising:

• a means for monitoring for the existence of a vibration state including the microprocessor receiving a value reflecting the amount of vibration;
• and
• if a vibration state is detected, the microprocessor under the control of a program to:
• calculate an amount of the post-read to be performed on the first track before seeking to the second track, the amount of post-read dependent on the measured vibration;
• and
• modify the read caching algorithm based on the vibration state by adjusting the amount of post-read performed on the first track based on the vibration state.

A rotating media storage device (RMSD) connectable to a host computer, the RMSD being subject to periods of sustained vibration causing a vibration state to exist and having a disk including at least a first track and a second track, a moveable head, a cache memory and a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations, the RMSD further comprising:

• a means for monitoring for the existence of a vibration state;
• and if a vibration state is detected, the microprocessor under the control of a program to,
• modify the read caching algorithm based on the vibration state including:
• eliminating the post-read operation on the first track;
• immediately commanding the moveable head to seek to the second track;
• and
• commanding the moveable head to only perform a portion of the pre-read operation on the second track.

A rotating media storage device (RMSD) connectable to a host computer, the RMSD being subject to periods of sustained vibration causing a vibration state to exist and having a disk including at least a first track and a second track, a moveable head, a cache memory and a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations, the RMSD further comprising:

• a means for monitoring for the existence of a vibration state;
• and
• if a vibration state is detected, the microprocessor under the control of a program to:
• receive a value reflecting the amount of vibration;
• estimate a read access time to the second track based on the vibration state;
• calculate an amount of post-read to be performed on the first track before seeking to the second track, the amount of post-read being dependent on the measured vibration;
• modify the read caching algorithm based on the vibration state;
• and
• command the moveable head to seek to the second track.

A rotating media storage device (RMSD) connectable to a host computer, the RMSD being subject to periods of sustained vibration causing a vibration state to exist and having a disk including at least a first track and a second track, a moveable head, a cache memory and a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations, the RMSD further comprising:

• a means for monitoring for the existence of a vibration state;
• and
• if a vibration state is detected, the microprocessor under the control of a program to:
• estimate a read access time to the second track based on the vibration state and modify the read caching algorithm based on the vibration state including:
• eliminating the post-read operation on the first track;
• immediately commanding the moveable head to seek to the second track;
• and
• commanding the moveable head to only perform a portion of the pre-read operation on the second track.

A computer system comprising a host computer and a rotating media storage device (RMSD), the RMSD being subject to periods of sustained vibration causing a vibration state to exist, the RMSD further comprising:

• a disk including at least a first track and a second track;
• a moveable head;
• a cache memory;
• a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations;
• a means for monitoring for the existence of a vibration state;
• and
• if a vibration state is detected, the microprocessor under the control of a program to:
• receive a value reflecting the amount of vibration;
• calculate an amount of post-read to be performed on the first track before seeking to the second track, the amount of post-read being dependent on the measured vibration;
• and
• modify the read caching algorithm based on the vibration state by adjusting the amount of post-read performed on the first track based on the vibration state.

A computer system comprising a host computer and a rotating media storage device (RMSD), the RMSD being subject to periods of sustained vibration causing a vibration state to exist, the RMSD further comprising:

• a disk including at least a first track and a second track;
• a moveable head;
• a cache memory;
• a microprocessor for controlling operations in the RMSD including seek operations and a read caching algorithm for read operations that include pre-read operations and post-read operations;
• a means for monitoring for the existence of a vibration state;
• and
• if a vibration state is detected, the microprocessor under the control of a program to:
• receive a value reflecting the amount of vibration;
• estimate a read access time to the second track based on the vibration state;
• calculate an amount of the post-read to be performed on the first track before seeking to the second track, the amount of post-read dependent on the measured vibration;
• modify the read caching algorithm by adjusting the amount of post-read performed on the first track based on the vibration state;
• and
• command the moveable head to seek to the second track.