A server box embodiment is disclosed that generally comprises an array of dummy HDDs that share a common set of universal disk drive components in a master components module, or power module. Each dummy HDDs is constructed without expensive onboard chipsets that control the normal functionality of a standard HDD. By sharing expensive chipsets in a master components module (power module) money can be saved in building and selling the dummy HDD server. Embodiments envision a power module possessing the needed chipset functionality that is missing in a dummy HDD. The power module can be made to move from dummy HDD to dummy HDD supplying the necessary chipset in a shared manner when data is being stored or retrieved for client or end-user.

A server box embodiment is disclosed that generally comprises an array of dummy HDDs that share a common set of universal disk drive components in a master components module, or power module. Each dummy HDDs is constructed without expensive onboard chipsets that control the normal functionality of a standard HDD. By sharing expensive chipsets in a master components module (power module) money can be saved in building and selling the dummy HDD server. Embodiments envision a power module possessing the needed chipset functionality that is missing in a dummy HDD. The power module can be made to move from dummy HDD to dummy HDD supplying the necessary chipset in a shared manner when data is being stored or retrieved for client or end-user.

According to one embodiment, a magnetic disk device includes a first magnetic disk, a second magnetic disk, a first actuator with a first head which reads/writes data from/to the first magnetic disk, a second actuator with a second head which reads/writes data from/to the second magnetic disk, the second actuator operated independently from the first actuator, a first controller configured to retracts the first actuator at a first time, and a second controller configured to retract the second actuator at a second time which is shifted from the first time by a certain period of time.

According to one embodiment, a magnetic disk device includes a first magnetic disk, a second magnetic disk, a first actuator with a first head which reads/writes data from/to the first magnetic disk, a second actuator with a second head which reads/writes data from/to the second magnetic disk, the second actuator operated independently from the first actuator, a first controller configured to retracts the first actuator at a first time, and a second controller configured to retract the second actuator at a second time which is shifted from the first time by a certain period of time.

Example redundant array of independent disks (RAID) storage systems and methods provide rebuild of logical data groups in priority order. Storage devices are configured as a storage array for storing logical data groups distributed among the storage devices. The logical data groups are written in a configuration of RAID stripes in the storage devices. A logical group index includes a logical group map for each logical data group and identifies corresponding logical blocks. When a storage device fails, the rebuild queue is ordered based on the priority of the logical data groups and rebuild to the replacement storage device is completed in the priority order.

Apparatus for data storage in a cartridge library archival system. In some embodiments, a plurality of portable data storage cartridges are provided. Each cartridge has a sealed housing which encloses at least one head-disc interface (HDI) with a magnetic data transducer adjacent a rotatable data recording medium. An access station has control electronics configured to transfer data signals between a memory and the transducer of a selected cartridge loaded to the access station. The access station further has an external voice coil motor (VCM) configured to engage and advance the transducer of the selected cartridge across a recording surface of the medium. A transport mechanism can be used to automatically load the cartridges to the access station. Multiple cartridges can be loaded sequentially or concurrently to support various data transfer operations.

A storage enclosure includes a plurality of hard drive sub-boards, each configured to include a plurality of hard drives. A local logic device manages each hard drive sub-board. A master logic device manages the local logic devices. The master logic device receives management commands from a host computer system coupled to the storage enclosure, and routes those commands to specific local logic devices. The local logic devices then relay the commands to specifically targeted hard drives. Thus, each hard drive within the storage enclosure can be independently controlled, allowing a single hard drive to be powered down without powering down other hard drives in the enclosure.

Provided is a hard disk peak shift starting system, including: a power supply unit, a mainboard and a hard disk backplane. The power supply unit provides power to hard disks via a first power connector, a second power connector, E-Fuse chips and hard disk connectors. A Complex Programmable Logic Device (CPLD) unit sets a power-up starting sequence of the hard disks and a power-up starting time interval between the hard disks, and the CPLD unit is connected to a logical control end of each of the E-Fuse chips to control, based on the set power-up starting sequence and the set power-up starting time interval, on-off of a power supply end of each of the E-Fuse chips, to realize control of peak shift powering up and starting of the hard disks.

Embodiments generally relate to data storage in a computing system. The present technology discloses techniques that that can enable an optimized mechanism to change spinning speed of data storage disk drives. The present technology can use a service controller, e.g. a Baseboard Management Device (BMC), to communicate with a disk controller to change the spinning speed of disk drives. The present technology can improve energy efficiency by efficiently controlling the spinning speed of disk drives. It can also reduce data access latency by promptly spinning up a disk from a spun-down state.

The invention relates to the spindle motor for driving a hard disk drive, comprising: a stationary motor component (10, 12, 16, 18), a rotary motor component (14) rotatably mounted relative to the stationary motor component using a fluid dynamic bearing system, a bearing gap (20) disposed between the stationary motor component and the rotary motor component and filled with a bearing fluid, having at least one open end, at least one sealing gap (34) for sealing the open end, at least one cover cap (30) for covering the sealing gap, which is secured to the rotatable motor component, a disk clamp (44) for attachment of at least one magnetic storage disk (48) on the rotatable motor member and an electromagnetic drive system (40, 42) to drive the rotatable motor member. The disk clamp (44, 156) is centered on a peripheral surface of the cover cap (30, 118).