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It's always best to test with a benchmark suite that closely approximates the real life application, so sustained throughput is an important number for copying large files, while random access time is a good metric for reading lots of small files and database use. &nbsp;Both are available from HDTune, but a more thorough test is IOZone <a href="http://www.iozone.org/" rel="ugc">http://www.iozone.org/</a>.<br />
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For a rough estimate, 1000 divided by the random access time in millisec will give you the number of I/O's per second.
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It's always best to test with a benchmark suite that closely approximates the real life application, so sustained throughput is an important number for copying large files, while random access time is a good metric for reading lots of small files and database use.  Both are available from HDTune, but a more thorough test is IOZone http://www.iozone.org/ [http://www.iozone.org/].

For a rough estimate, 1000 divided by the random access time in millisec will give you the number of I/O's per second.

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I have a hitachi Z7K320-250 hard drive and a seagate ST3320413AS. How can I find out what the disk I/O rating is for these hard drives?
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I have a hitachi Z7K320-250 hard drive and a seagate ST3320413AS. How can I find out what the disk I/O rating is for these hard drives?

what is disk I/O rating for hitachi or seagate hard drive

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

A desktop computer is a personal computer designed for use at a single location due to its size and power requirements, usually by one person. The most common configuration has a case that houses the power supply, motherboard, disk storage (usually one or more hard disk drives and optical disc drives); a keyboard and mouse for input; and computer monitor and printer for output. The case may be oriented horizontally and placed atop a desk or vertically and placed underneath or beside a desk.

Desktops

A laptop or notebook is a portable personal computer with a clamshell form factor, suitable for mobile use. Although originally there was a distinction between laptops and notebooks, the former being bigger and heavier than the latter, there is often no longer any difference. Laptops are commonly used in a variety of settings, such as at work, in education, and for personal multimedia. A laptop combines the components, inputs, outputs and capabilities of a desktop computer, including the display screen, speakers, a keyboard, and pointing devices (such as a touchpad or trackpad) into a single unit. The device can be powered either from a rechargeable battery or by mains electricity from an AC adapter.