Systems and methods for asynchronous-frequency tracking of disk drive rotational vibration (RV) performance with position error signal (PES)
View Patent ↗Systems and methods are provided that may be implemented to provide a mechanical indicator to correlate magnetic disk drive IOP performance with features of mechanical and/or acoustic vibrational frequencies that are generated and captured or sensed outside of the disk drive itself. In one example, disk drive PES data may be collected concurrently with the capture of mechanical and/or acoustic vibrational data at different and progressive locations of vibration source, vibration path and vibration receiver in a disk drive operating environment, e.g., such as for disk drives installed within a server and/or storage chassis enclosure. In such case, PES threshold may be utilized to correlate performance of Drive IOP or drive servo-mechanical performance as a function of measured characteristics of vibration source/s that impart vibration to a disk drive.
1. A system, comprising:
at least one processing device;
an information handling system chassis including at least one of an enclosure, a frame, or a combination thereof;
at least one magnetic disk drive mechanically coupled to the chassis, the disk drive being configured to generate position error signals (PES) data, and to provide the PES data to the at least one processing device;
one or more vibration sensor components configured to sense at least one of mechanical or acoustic vibrations simultaneously with the generation of the PES data by the disk drive, and to provide sensed vibration data representative of the sensed mechanical or acoustic vibrations to the at least one processing device; and
at least one vibration source configured to operate at different operational levels that produce different corresponding frequencies of vibration;
where the at least one processing device is configured to at least one of:
correlate a magnitude of the generated PES data with a frequency of the vibration data that is simultaneously sensed with the generated PES data, or
control or sense the current operational level of the vibration source and to correlate each of multiple different operational levels of the vibration source with a frequency of the vibration data that is simultaneously sensed or controlled while the vibration source is operating at the given operational level, or
a combination thereof.
2. The system of claim 1 , where the generated PES data has greater and lesser values of magnitude; and where the processing device is further configured to:
determine one or more values of sensed vibration frequency that correspond to one or more generated PES values of greater magnitude; and
determine one or more vibration source operation levels of the vibration source that correspond to the one or values of sensed vibration frequency.
3. The system of claim 1 , where the chassis comprises a chassis frame disposed inside a chassis enclosure; and where the vibration source is an internal vibration source that is mechanically coupled to the chassis frame.
4. The system of claim 3 , where the vibration sensor components comprise at least one vibration source sensor component coupled to sense vibration of the vibration source, at least one vibration path sensor component coupled to sense vibration of the chassis frame, and at least one vibration receiver sensor component coupled to sense vibration of the disk drive.
5. The system of claim 1 , where the generated PES data has greater and lesser values of magnitude; and where the processing device is further configured to:
identify a range of one or more values of sensed vibration frequency that correspond to one or more generated PES values of greater magnitude; and
correlate the identified range of vibration frequency with the corresponding operational level of the vibration source.
6. The system of claim 1 , where the processing device is a host CPU of the disk drive that is coupled to receive a current given operational level of the vibration source and to correlate the current given operational level of the vibration source with a value of PES data that is simultaneously sensed while the vibration source is operating at the current given operational level.
7. The system of claim 1 , where the vibration source is an external vibration source positioned to transfer vibrational waves to the chassis.
8. The system of claim 1 , further comprising an external test system that includes the processing device, the processing device of the external test system being coupled to control the external vibration source.
9. A test method, comprising:
providing a system that includes:
at least one processing device,
an information handling system chassis including at least one of an enclosure, a frame, or a combination thereof,
at least one magnetic disk drive mechanically coupled to the chassis,
one or more vibration sensor components, and
at least one vibration source;
using the disk drive to generate position error signals (PES) data, and to provide the PES data to the at least one processing device;
using the one or more vibration sensor components to sense at least one of mechanical or acoustic vibrations simultaneously with the generation of the PES data by the disk drive, and to provide sensed vibration data representative of the sensed mechanical or acoustic vibrations to the at least one processing device;
operating the at least one vibration source at different operational levels to produce different corresponding frequencies of vibration; and
using the at least one processing device to at least one of:
correlate a magnitude of the generated PES data with a frequency of the vibration data that is simultaneously sensed with the generated PES data, or
control or sense the current operational level of the vibration source and to correlate each of multiple different operational levels of the vibration source with a frequency of the vibration data that is simultaneously sensed or controlled while the vibration source is operating at the given operational level, or
a combination thereof.
10. The method of claim 9 , where the generated PES data has greater and lesser values of magnitude; and where the method further comprising using the at least one processing device to:
determine one or more values of sensed vibration frequency that correspond to one or more generated PES values of greater magnitude; and
determine one or more vibration source operation levels of the vibration source that correspond to the one or values of sensed vibration frequency.
11. The method of claim 9 , where the chassis comprises a chassis frame disposed inside a chassis enclosure; and where the vibration source is an internal vibration source that is mechanically coupled to the chassis frame.
12. The method of claim 11 , where the vibration sensor components comprise at least one vibration source sensor component coupled to sense vibration of the vibration source, at least one vibration path sensor component coupled to sense vibration of the chassis frame, and at least one vibration receiver sensor component coupled to sense vibration of the disk drive.
13. The method of claim 9 , where the generated PES data has greater and lesser values of magnitude; and where the method further using the processing device to:
identify a range of one or more values of sensed vibration frequency that correspond to one or more generated PES values of greater magnitude; and
correlate the identified range of vibration frequency with the corresponding operational level of the vibration source.
14. The method of claim 13 , further comprising making one or more changes in at least one of internal mechanical hardware configuration of the information handling system chassis, external configuration of adjacent external vibration sources, and/or operating parameter configuration for the vibration source based on the correlation of vibration source operational level with vibration frequency.
15. The method of claim 9 , where the processing device is a host CPU of the disk drive; and where the method further comprises using the host CPU to receive a current given operational level of the vibration source and to correlate the current given operational level of the vibration source with a value of PES data that is simultaneously sensed while the vibration source is operating at the current given operational level.
16. The method of claim 9 , where the vibration source is a vibration source external to the information handling system chassis; and where the method further comprises using the external vibration source to transfer vibrational waves to the chassis.
17. The method of claim 9 , further comprising:
providing a test system external to the information handling system chassis, the external test system including the at least one processing device; and
using the processing device of the external test system to control the external vibration source.
18. A magnetic disk drive, comprising:
a rotating platter having data tracks defined thereon;
a swing arm and drive head assembly including drive heads configured to read and write data on the rotating platter relative to the rotating platter tracks;
a motor coupled to move the swing arm and drive heads relative to the rotating platter;
a motor controller configured to control positioning of the swing arm and drive heads relative to the rotating platter and to generate position error signals (PES) data based thereupon; and
at least one processing device coupled to receive the PES data from the motor controller and further configured to be coupled to receive information representative of a current real time operational level of a vibration source;
where the processing device is configured to correlate and synchronize different real time operational levels of the vibration source with corresponding respective real time PES values of the PES data that are simultaneously generated while the vibration source is operating at the different respective operational levels.
19. The disk drive of claim 18 , where the rotating platter is a magnetic platter.
20. The disk drive of claim 18 , further comprising at least one memory device coupled to the processing device; and where the processing device is configured to store the synchronized operational level/PES data on the memory device.