Western Digital Purple Pro PR22 handleiding
Handleiding
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Product Features
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3.6 Perpendicular Magnetic Recording (PMR)
With PMR technology the magnetization of each data bit is aligned vertically to the
spinning disk, rather than longitudinally as has been the case in hard drive technology
for decades. This enables more data on a given disk than is possible with
conventional longitudinal recording, and provides a platform for future expansion of
hard drive densities.
3.7 NoTouch Ramp Load Technology
Parks the recording heads off the disk surface during spin up, spin down and when
the drive is off. This ensures the recording head never touches the disk surface
resulting in improved long term reliability due to less head wear, and improved non-
operational shock tolerance.
3.8 Dual Stage Actuator Technology
A head positioning system with dual-stage actuators that improves positioning
accuracy over the data track(s). The primary stage provides course displacement; the
secondary stage uses piezoelectric motion to fine tune the head positioning to a
higher degree of precision.
3.9 Advanced Format (AF)
Technology adopted by WD and other drive manufacturers as one of multiple ways to
continue growing hard drive capacities. AF is a more efficient media format that
enables increased areal densities.
3.10 Native Command Queuing (NCQ )
These drives support Native Command Queuing. NCQ is a true Enterprise feature for
environments such as database, Web servers, and e-mail servers.
Performance of a random I/O workload can be improved through intelligent re-
ordering of the I/O requests so they read/write to and from the nearest available
sectors and minimize the need for additional disk revolutions or head actuator
movement. This improvement is achieved though Native Command Queuing (NCQ).
NCQ allows the drive to re-order read commands, thereby increasing random read
IOPs. Additional NCQ features that can prove beneficial include a Write Cache
disabled IOP increase and a queuing implementation built upon an existing, highly
automated cache architecture. Queued reads in NCQ leverage the same re-ordering
schemes used for write caching. The firmware design maintains the “order” of
overlapping/colliding queued commands. NCQ is designed to excel in multi-
threaded environments with high random I/O loads.
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Productinformatie
| Merk | Western Digital |
| Model | Purple Pro PR22 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 4319 MB |