HP 1 TB 3.5" Internal Hybrid Hard Drive - SATA - 8 GB SSD Cache Capacity

Commercial grade SATA 7200 rpm drives are our standard high bandwidth hard drive storage option. Storage capacities for the 7200 rpm drives range up to a massive 4.0TB. This enables very large capacity storage solutions due to the expandability of the workstation platforms. In addition, the high capacity drives can be combined with SSD storage to enable high performance and large capacity solutions.

Most of the 7200 rpm HDDs are 3.5" drive s. The one exception is the new 500GB SATA 7200 rpm SED drive which is 2.5" form factor. This drive ships with the appropriate carrier to enable installation in the 3.5" bays.

SMART technology
Self Monitoring Analysis and Reporting Technology (SMART) hard drive technology allows hard drives to monitor their own health and to raise flags if imminent failures are predicted. If the drive determines that a failure is imminent, the SMART hard dri ve technology enables intelligent manageability or management softw are to generate a fault alert. While the legacy versions of SMART hard drives do a good job monitoring the data on the hard drive media, the ever increasing emphasis on reliability and quality has prompted HP to implement SMART IV technology which constant ly checks that the data flow from host interface to media and media to host interface is not compromised. This is accomplished by inserting a parity code into every 512 byte blo ck in the data path of the hard drive's Cache RAM. This parity checking perform ed by HP's SMART IV technology hard drives, allows for more complete error detection coverage encompassing the entire data path between the host and the hard drive. Smart IV is also known as IOEDC: I/O Error Detection Code.

Restrictions on Hazardous Subst ances (RoHS)
RoHS is a European Union directive that requires OEM manufacturers' compliance. The directive assures that hazardous substances are not contained within electronic equipment. Those substances include lead, mercury, cadmium, hexavalent chromium , polybrominated biphenyls and polybrominated diphenyl ethers. Hewlett - Packard is committed to adhering to this directive.

Native Command Queuing
NCQ, or Native Command Queuing, is a capability of modern SATA drives. NCQ is a SATA protocol extension that a llows the hard drive to have several write or read commands outstanding at the same time. In contrast, normal non - queued operation requires each command to be completed before the next command is issued by the host system. Queuing allows the drive to compl ete the commands in the order that allows for best overall throughput. It also involves an advanced method of transferring data to or from the host, called First Party Direct Memory Access (FPDMA), that allows the hard drive and the host controller to mana ge the data transfers for multiple outstanding commands, without involving the host processor. NCQ can contribute to better performance but the results are dependent on many factors, including the access patterns of the various applications and operating s ystem functions that are initiating drive accesses. It requires support from the host system BIOS, controller, and driver in order to be useful. However NCQ - capable drives are compatible with host systems that do not include the support; the NCQ and FPDMA features are simply not used on those systems.