SPAN.COM
Home CheckOut Log In/Register Log Out About Us Contact Us Call Us Privacy policy
01-4090-A 5.25" frame & bezel for any AIT/DAT, White
01-4090-A
ex.VAT £5.00 £6.00

 alternative
Why People Choose Us?

14 Day Return Guarantee

If you change your mind, you can return all or part of your order.


Next Day Delivery

Order before 4pm*, and in-stock products will be with you the next day. (Or Saturday. Or even Same Day).


WorldWide Deliveries

Wherever you are in the world, we can get your order to you at high speed.


SpanStor Build & Test

Our free service helps you choose the right NAS and Drives, then makes sure it is built & ready to use as soon as you get it.


Professional Live Support

We are here to assist you - before, during and after your purchase, by phone, email or live chat.


SPAN.COM Local Map:
2.9 Miles from New Malden (KT3). 3.2 Miles from Kingston Upon Thames (KT). 3.7 Miles from Esher (KT10). 5.9 Miles from Hampton (TW12). 2.8 Miles from Thames
Ditton (KT7). 7.1 Miles from Richmond (TW9). 5.9 Miles from Wimbledon (SW19). 5.7 Miles from Teddington (TW11). 10.8 Miles from Earlsfield (SW18). 8.3 Miles from Mitcham (CR4). 12.7 Miles from Croydon (CR). 13 Miles from Center of London (WC).
SPAN.COM local MAP

www.facebook.com/SPANdotCOMwww.twitter.com/SPANdotCOMwww.youtube.com/user/SPANdotCOM

Pay by Paypal pay by card

© 1994-2019 Worldspan Communications Ltd
Call us on [+44] (0)20 8288 8555

Privacy policy

Terms and conditions


We use cookies to give you the best experience possible. By continuing to navigate through this site you consent to the use of cookies in accordance with our Cookies Policy

Mobile View / Desktop View




DDS Accessories

call for support!
Unbranded
bg image








Sort By
BDBx
01-4090-A 5.25" frame & bezel for any AIT/DAT, White
ex.VAT £5.00
£6.00
Some stock @ SPAN

Digital Data Storage (DDS) is a format for storing and backing up computer data on magnetic tape that evolved from Digital Audio Tape (DAT) technology, which was originally created for CD-quality audio recording. In 1989, Sony and Hewlett Packard defined the DDS format for data storage using DAT tape cartridges. Tapes conforming to the initial DDS format can be "played" by either DAT or DDS tape machines. However, most DDS tape drives cannot retrieve the audio stored on a DAT cartridge.

DDS uses 3.8 millimeter wide tape. Initially, the tape was 60 or 90 meters long, although advancements in materials technology have allowed the length to be increased significantly in successive versions. A DDS tape drive uses helical scanning for recording, the same process used by a video cassette recorder (VCR). There are two read heads and two write heads. The read heads verify the data that has been written (recorded). If errors are present, the write heads rewrite the data.

A DDS cartridge needs to be retired after 2,000 passes or 100 full backups. Tape drives should be cleaned regularly to be kept in good working order. DDS tapes have an expected life of at least 10 years.

The DDS format competes mainly against the LTO, AIT, VXA, and Travan formats.

DDS-1
Stores up to 1.3 GB uncompressed (2.6 GB compressed) on a 60 meter cartridge, 2 GB uncompressed (4GB compressed) on a 90 meter cartridge.


DDS-2
Stores up to 4 GB uncompressed (8 GB compressed) on a 120 meter cartridge.


DDS-3
Stores up to 12 GB uncompressed (24 GB compressed) on a 125 meter cartridge. DDS-3 uses PRML (Partial Response Maximum Likelihood). PRML eliminates electronic noise for a cleaner data recording.


DDS-4
DDS-4 stores up to 20 GB uncompressed (40 GB compressed) on a 150 meter cartridge. This format is also called DAT 40.


DAT 72
DAT72 stores up to 36 GB uncompressed (72 GB compressed) on a 170 meter cartridge. The DAT 72 standard was developed by HP and Certance. It has the same form-factor and is backwards compatible with DDS-3 and -4.


DAT 160
DAT 160 was launched in June 2007 by HP. A major change from the previous generations is the width of the tape. DAT 160 uses 8 mm wide tape while all prior versions use 3.81 mm wide tape. Despite the difference in tape widths, DAT 160 drives are backwards compatible with DAT 72 and DAT 40 (DDS-4). Native capacity is 80GB and native transfer rate 6.9MB/s. Launch interfaces are SCSI and USB.

The next drive in the DAT roadmap is the DAT 320.

This article is licensed under the GNU Free Documentation License. It uses material from the following Wiki article(s) :
* Digital_Data_Storage

Buy DDS Accessories FREE ✓BUILD ✓RAID ✓TEST ✓BUSINESS QUOTES | SPAN.COM
☎Call for pricing 020 8288 8555 sales@span.com ✓Free Advice ✓Lowest Price often available

trustpilot review
SPAN.COM Trustpilot Reviews
With 761 reviews - 5 out of 5
761 reviews


We use cookies to give you the best experience possible. By continuing to navigate through this site you consent to the use of cookies in accordance with our Cookies Policy


Unit 19,
Red Lion Business Centre,
Red Lion Road,
Tolworth, Surbiton,
Surrey,
KT6 7QD
England -UK

We recommend:
NAScompares.com HDDcompares.com SSDcompares.com Thunderboltcompares.com
SPAN.COM
New Malden
Kingston Upon Thames
Esher
Hampton
Thames
Ditton
Richmond
Wimbledon
Teddington
Earlsfield
Mitcham
Croydon
Center of London (WC)
SPAN.COM local MAP

By using this website, you agree to our use of cookies to enhance your experience. Read more