ST3300655SS New Seagate Hard Drive

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Part Number:  ST3300655SS *

*Click Part Number to Buy or For Pricing Info

Brand: Seagate

Description: New Cheetah 300GB 15000RPM Ultra320 SAS Hard Drive Weight 5.00 lbs. 90 Day Warranty

More Product Info on ST3300655SS

4 mm DAT tape drives and their use in back up devices:

A tape drive is relatively an older generation of storage technologies. DAT stands for Digital Audio Tape. The storage of digital data on these tapes gives rise to a computer data storage format known as DDS which means Digital Data Storage. Several versions of DDS were developed and some of these versions are still in use in the present day modern backup technology. 4 mm DAT drives and other DAT drives were used under DDS specification in a robust cockpit voice and flight data recorders as a black box for the flights, jets and aeroplanes. These are also used is several other applications where data storage with other technologies becomes unreliable.
A DDS tape drive uses helical scanning for recording the data. This is the same process that is used by VCR recorders. If any errors are found in the data stored, the write head rewrites the data. DDS generally uses a 3.8 mm wide tape drive for recording the data. However, in the newer versions of DDS, the tape width has been extended up to as much as 8 mm wide. Tape drives are sensitive to various physical conditions like dust and moisture. So, these tape drives must be cleaned regularly for efficient performance. Otherwise, the data stored might be at risk due to the physical destruction caused to the drive. Companies such as Seagate, HP and others manufacture these tape drives for back up storage purposes.
There are various generations of DDS specifications. Let us have a look at them.
DDS-1: This was the first generation of DDS and it is most commonly known as just DDS. This technology offered 1.3 GB of uncompressed data storage with a 60 meter long tape drive. When the data is compressed, the data stored can be doubled, that is 2.6 GB of compressed data. More data capacity can be achieved by using more length of tape.
DDS-2: This offered 4 GB uncompressed and 8 GB compressed data on a 120 meter long tape drive.
DDS-3: 12 GB uncompressed and 24 GB compressed data on 125 m drive. DDS 3 also uses advanced technology that minimises the electric noise and helps for cleaner data recording.
DDS-4 20 GB uncompressed and 40 GB compressed data on 150 m drive. Also known as DAT 40.
DAT 72: It was developed by HP and Certance. It offers 36 GB uncompressed with 72 GB compressed amount of data storage.
DAT 160 and DAT 320 are other generations which offered 80 GB and 160 GB of uncompressed data respectively. When compressed, double the amount of data can be stored. These latest devices have host interfaces for connecting through SCSI, USB and other standards.

By: Sandeep Mahanthi

Hard Drives

Hard drives, hard disk drives or fixed disk drives are random access digital magnetic data storage devices. Hard Drives are very important part of a computer. Most of desktop computer and servers in use today contain one or more hard-disk drives. Every mainframe and supercomputer is normally connected to hundreds of hard drives because they need more space for their work. You can even find VCR-type devices and camcorders that use hard drives instead of tape drives. These billions of hard drives do one thing well and they store changing digital information in a relatively permanent form. They give computers the ability to remember things when the power goes out. Seagate, WDC Western Digital, HP / Compaq, Samsung and Hitachi/IBM are the best companies for hard drives. Most computer users are using 250 GB-520 GB Hard Drives. If your computer is more powerful then you can use use more data storage capacity. A computer will not function to well without hard drives. So hard drives are very important for computers to function.

New & Refurbished Hard Drives

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New and Refurbished Hard Drives