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&quot;an entry level server &quot;<br />
Please understand that the faster hard drives run much hotter than standard hard drives and will probably need better than an entry level servers cooling system.
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"an entry level server "
Please understand that the faster hard drives run much hotter than standard hard drives and will probably need better than an entry level servers cooling system.

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I'm not sure what you mean by 
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and you are not using an expander with multiple drives sharing the same physical path.
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If we move ahead it will be a RAID 10 with 4 of the above mentioned drives.
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I'm not sure what you mean by

> and you are not using an expander with multiple drives sharing the same physical path.


If we move ahead it will be a RAID 10 with 4 of the above mentioned drives.

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What is the difference in performance between SATA 6 Gb/s and SATA 3 Gb/s inteface?<br />
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I'm looking at buying these drive for an entry level server to run a Postgress SQL database on. <br />
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The drives are Enterprise SATA from Western Digital <br />
<a href="http://www.wdc.com/en/products/products.aspx?id=30" rel="ugc">http://www.wdc.com/en/products/products.aspx?id=30</a>
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What is the difference in performance between SATA 6 Gb/s and SATA 3 Gb/s inteface?

I'm looking at buying these drive for an entry level server to run a Postgress SQL database on. 

The drives are Enterprise SATA from Western Digital 
http://www.wdc.com/en/products/products.aspx?id=30

SATA hard drive question

Storage devices include any device used for storing and retrieving digital information. Hard disk drives (HDDs) use one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially. The primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs), but HDDs remain the dominant medium for secondary storage due to advantages in price per bit and per-device recording capacity. CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format that allows information to be stored outside the mechanical HDD.

Storage Hardware

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.

Storage

Servers are computing devices that are similar to desktop computers in that they have the same basic components, but are significantly different in size, configuration and purpose. Servers are usually accessed over a network, and many run unattended, without a computer monitor, input device, audio hardware or USB interfaces. Many servers do not have a graphical user interface (GUI), and are configured and managed remotely. Servers typically include hardware redundancy such as dual power supplies, RAID disk systems, and ECC memory, along with extensive pre-boot memory testing and verification. Critical components might be hot swappable, and to guard against overheating, servers might have more powerful fans or use water cooling.

Server Hardware

WD, a Western Digital company, is a long-time innovator and storage industry leader. As a storage technology pacesetter, the company produces reliable, high-performance hard disk drives and solid state drives. These drives are deployed by OEMs and integrators in desktop and mobile computers, enterprise computing systems, embedded systems and consumer electronics applications, as well as by the company in providing its own storage products. WD’s leading storage devices and systems, networking products, media players and software solutions empower people around the world to easily save, store, protect, share and experience their content on multiple devices. WD was established in 1970 and is headquartered in Irvine, Calif. For more information, please visit the company’s website at www.wd.com.