G11B15/473

SPLIT ACTUATOR DRIVE THAT LIMITS SLEW RATE OF AGGRESSOR VCM TO REDUCE VICTIM DISTURBANCES

A seek operation of a first actuator in a multi-actuator drive is modified, so that one or more disturbance-generating portions of the seek operation do not adversely affect operation of a second actuator in the drive. Radial motion of the aggressor actuator is controlled by limiting a slew rate of the first actuator during one or more portions of the seek operation to be less than or equal to a threshold value. Because slew rate of the first actuator is the rate of change of radial acceleration of the aggressor actuator with respect to time, limiting the slew rate of the first actuator prevents or reduces mechanical disturbances caused by jerk associated with motion of the first actuator.

SPLIT ACTUATOR DRIVE THAT LIMITS SLEW RATE OF AGGRESSOR VCM TO REDUCE VICTIM DISTURBANCES

A seek operation of a first actuator in a multi-actuator drive is modified, so that one or more disturbance-generating portions of the seek operation do not adversely affect operation of a second actuator in the drive. Radial motion of the aggressor actuator is controlled by limiting a slew rate of the first actuator during one or more portions of the seek operation to be less than or equal to a threshold value. Because slew rate of the first actuator is the rate of change of radial acceleration of the aggressor actuator with respect to time, limiting the slew rate of the first actuator prevents or reduces mechanical disturbances caused by jerk associated with motion of the first actuator.

SPLIT ACTUATOR DRIVE THAT LIMITS SLEW RATE OF AGGRESSOR VCM TO REDUCE VICTIM DISTURBANCES

A seek operation of a first actuator in a multi-actuator drive is modified, so that one or more disturbance-generating portions of the seek operation do not adversely affect operation of a second actuator in the drive. Radial motion of the aggressor actuator is controlled by limiting a slew rate of the first actuator during one or more portions of the seek operation to be less than or equal to a threshold value. Because slew rate of the first actuator is the rate of change of radial acceleration of the aggressor actuator with respect to time, limiting the slew rate of the first actuator prevents or reduces mechanical disturbances caused by jerk associated with motion of the first actuator.

SPLIT ACTUATOR DRIVE THAT LIMITS SLEW RATE OF AGGRESSOR VCM TO REDUCE VICTIM DISTURBANCES

A seek operation of a first actuator in a multi-actuator drive is modified, so that one or more disturbance-generating portions of the seek operation do not adversely affect operation of a second actuator in the drive. Radial motion of the aggressor actuator is controlled by limiting a slew rate of the first actuator during one or more portions of the seek operation to be less than or equal to a threshold value. Because slew rate of the first actuator is the rate of change of radial acceleration of the aggressor actuator with respect to time, limiting the slew rate of the first actuator prevents or reduces mechanical disturbances caused by jerk associated with motion of the first actuator.

RESTRICTED TRANSPORT STORAGE CARTRIDGES

In some examples, a computer receives a command to transport a storage cartridge in a storage system from a physical storage slot to a storage drive, and determines whether the storage cartridge is associated with a restricted transport indication set by a configuration operation in the storage system. In response to determining that the storage cartridge is associated with the restricted transport indication, the computer checks for an indication of receipt of an access secret information, and denies processing of the command to transport the storage cartridge if the indication of receipt of the access secret information is not present.

RESTRICTED TRANSPORT STORAGE CARTRIDGES

In some examples, a computer receives a command to transport a storage cartridge in a storage system from a physical storage slot to a storage drive, and determines whether the storage cartridge is associated with a restricted transport indication set by a configuration operation in the storage system. In response to determining that the storage cartridge is associated with the restricted transport indication, the computer checks for an indication of receipt of an access secret information, and denies processing of the command to transport the storage cartridge if the indication of receipt of the access secret information is not present.

Split actuator drive that limits slew rate of aggressor VCM to reduce victim disturbances

A seek operation of a first actuator in a multi-actuator drive is modified, so that one or more disturbance-generating portions of the seek operation do not adversely affect operation of a second actuator in the drive. Radial motion of the aggressor actuator is controlled by limiting a slew rate of the first actuator during one or more portions of the seek operation to be less than or equal to a threshold value. Because slew rate of the first actuator is the rate of change of radial acceleration of the aggressor actuator with respect to time, limiting the slew rate of the first actuator prevents or reduces mechanical disturbances caused by jerk associated with motion of the first actuator.

Split actuator drive that limits slew rate of aggressor VCM to reduce victim disturbances

A seek operation of a first actuator in a multi-actuator drive is modified, so that one or more disturbance-generating portions of the seek operation do not adversely affect operation of a second actuator in the drive. Radial motion of the aggressor actuator is controlled by limiting a slew rate of the first actuator during one or more portions of the seek operation to be less than or equal to a threshold value. Because slew rate of the first actuator is the rate of change of radial acceleration of the aggressor actuator with respect to time, limiting the slew rate of the first actuator prevents or reduces mechanical disturbances caused by jerk associated with motion of the first actuator.

Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
10515657 · 2019-12-24 · ·

Provided are a magnetic tape, in which a magnetic layer includes a ferromagnetic powder, a binding agent, and an oxide abrasive, SFD in a longitudinal direction of the magnetic tape calculated by Expression 1, SFD=SFD.sub.25 C.SFD.sub.190 C., is equal to or smaller than 0.50, a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding a surface of the magnetic layer is equal to or smaller than 0.050, and an average particle diameter of the oxide abrasive obtained from a secondary ion image obtained by irradiating the surface of the magnetic layer with a focused ion beam is 0.04 m to 0.08 m, and a magnetic recording and reproducing device including this magnetic tape.

Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
10515657 · 2019-12-24 · ·

Provided are a magnetic tape, in which a magnetic layer includes a ferromagnetic powder, a binding agent, and an oxide abrasive, SFD in a longitudinal direction of the magnetic tape calculated by Expression 1, SFD=SFD.sub.25 C.SFD.sub.190 C., is equal to or smaller than 0.50, a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding a surface of the magnetic layer is equal to or smaller than 0.050, and an average particle diameter of the oxide abrasive obtained from a secondary ion image obtained by irradiating the surface of the magnetic layer with a focused ion beam is 0.04 m to 0.08 m, and a magnetic recording and reproducing device including this magnetic tape.