hard disk drives
Magnetic data platters
Hard disk drives are data storage devices that use spinning magnetic platters to read and write information.
They store operating systems, applications, and files in computers and external enclosures.
The technology dominated personal computing for decades before solid-state drives began replacing them.
Often shortened to hard drives or abbreviated HDD.
Trillion-byte units
- gigabytesData capacity units
- petabytesHuge data measurement unit
- capacityMaximum amount containable
- partitionsBarriers dividing a space
volumes · sectors · platters · cylinders · tracks · clusters · allocation · formatting
Resistance to wear
- longevityDuration of existence
- failure rateHow often something fails
- S.M.A.R.T.Goal-setting evaluation criteria
- spin-upAcceleration to operational state
bad sectors · wear · degradation · lifespan · dependability · error correction · data integrity
Turns in sixty seconds
- seek timeDelay moving read head
- latencyDelay in system response
- throughputProcessing rate over time
- transfer rateData movement speed
cache · buffer · access time · write speed · defragmentation · optimization · benchmarks
Large serving dishes
- spindleRotating rod for thread
- actuatorDevice producing controlled motion
- motorEnergy-to-motion converter
- cacheConcealed storage spot
controller · PCB · enclosure · firmware · interface · SATA · IDE · SCSI
Regaining what was lost
- restoreReturn to earlier state
- cloningMaking identical copies
- imagingProducing visual representations
- incrementalProceeding by small additions
full backup · snapshots · redundancy · RAID · mirroring · replication · disaster recovery · data loss
terabytes
Trillion-byte units
partitions · volumes · sectors · platters · cylinders · tracks · clusters · allocation · formatting · file systems
durability
Resistance to wear
- longevityDuration of existence
- failure rateHow often something fails
- S.M.A.R.T.Goal-setting evaluation criteria
bad sectors · spin-up · wear · degradation · lifespan · dependability · error correction · data integrity
RPM
Turns in sixty seconds
- seek timeDelay moving read head
- latencyDelay in system response
- throughputProcessing rate over time
transfer rate · cache · buffer · access time · write speed · defragmentation · optimization · benchmarks
platters
Large serving dishes
- spindleRotating rod for thread
- actuatorDevice producing controlled motion
- motorEnergy-to-motion converter
cache · controller · PCB · enclosure · firmware · interface · SATA · IDE · SCSI · SAS
recovery
Regaining what was lost
incremental · full backup · snapshots · redundancy · RAID · mirroring · replication · disaster recovery · data loss · archival
hard disk drivessolid-state drives
Non-mechanical digital storage
SSDs · flash drives · flash memory · memory cards · SD cards
hard disk drivesRAM
Temporary data storage hardware
volatile memory · random access memory · DRAM · cache memory · SRAM
hard disk drivescloud storage
Online data preservation service
optical discs · CD-ROMs · DVDs · floppy disks · memory cards
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