HP StoreEver Q1573B 사용자 설명서
제품 코드
Q1573B
DDS Technology
DDS/DAT continues to be the unit volume leader in the tape drive market for small and medium businesses
with a current installed base of over 6 million units and over 18 million DAT drives shipped since its
introduction in 1989. This remarkable tape technology continues to flourish because it meets the needs of
the SMB market for cost-effective, reliable backup better than any other low end tape technology
available.
with a current installed base of over 6 million units and over 18 million DAT drives shipped since its
introduction in 1989. This remarkable tape technology continues to flourish because it meets the needs of
the SMB market for cost-effective, reliable backup better than any other low end tape technology
available.
DDS/DAT is based on an open standard format for data interchange. The influential DAT manufacturers
group presides over this open standard with verification processes that ensure compliance. With multiple
manufacturers developing and shipping DDS/DAT products, customers benefit from increased
competition, which leads to better prices, faster development and more choice.
group presides over this open standard with verification processes that ensure compliance. With multiple
manufacturers developing and shipping DDS/DAT products, customers benefit from increased
competition, which leads to better prices, faster development and more choice.
DDS format for DAT is a helical scan format where data is written diagonally across the width of the tape.
The advantage is that, by allowing subsequent tracks to have different writing angles and to overlap, a
much greater capacity can be achieved for a given length of tape because no guard bands are necessary.
The data format also allows for fast location of tracks and data. To achieve this, the rotating drum is tilted
at a slight angle (6°) from the vertical. The drum has four heads (two write heads and two read heads),
located at 90° intervals. For each rotation of the drum, two tracks are written. The read heads verify the
data that has been written (recorded) and the drive rewrites if necessary. The open format ensures
interchangeability between different DDS format drives.
The advantage is that, by allowing subsequent tracks to have different writing angles and to overlap, a
much greater capacity can be achieved for a given length of tape because no guard bands are necessary.
The data format also allows for fast location of tracks and data. To achieve this, the rotating drum is tilted
at a slight angle (6°) from the vertical. The drum has four heads (two write heads and two read heads),
located at 90° intervals. For each rotation of the drum, two tracks are written. The read heads verify the
data that has been written (recorded) and the drive rewrites if necessary. The open format ensures
interchangeability between different DDS format drives.
HP has been involved in the design and development of DAT drives since the beginning and applies these
many years of experience to its current line of DAT products. Not only does an investment in DAT
technology provide the security of a format with a history of outstanding reliability, the legacy of
backward compatibility also provides the potential for future expansion without compromising your
investment in the technology.
many years of experience to its current line of DAT products. Not only does an investment in DAT
technology provide the security of a format with a history of outstanding reliability, the legacy of
backward compatibility also provides the potential for future expansion without compromising your
investment in the technology.
The target market for DAT continues to be direct-attach backup. In small and medium sized businesses
cost of ownership, ease of use and a proven history (i.e. low risk) are paramount. DAT technology provides
the capacity and performance needed in a tape backup solution for workstations and entry-level servers.
cost of ownership, ease of use and a proven history (i.e. low risk) are paramount. DAT technology provides
the capacity and performance needed in a tape backup solution for workstations and entry-level servers.
Specific Note on DAT 160
The DAT 160 drive employs the same technology as previous DAT products, and uses DAT 160 wide media
in order to achieve higher capacities. However, it maintains 2 generation backward compatibility and can
still read and write data to DAT 72 and DAT 40 (DDS-4) cartridges. It does this by recognizing the different
tapes (wider DAT 160 and the narrower DAT 72/DDS-4).
The DAT 160 drive employs the same technology as previous DAT products, and uses DAT 160 wide media
in order to achieve higher capacities. However, it maintains 2 generation backward compatibility and can
still read and write data to DAT 72 and DAT 40 (DDS-4) cartridges. It does this by recognizing the different
tapes (wider DAT 160 and the narrower DAT 72/DDS-4).
Backwards Compatibility HP DAT tape drives are backward read-write compatible with previous generations, thus:
DAT 160 also reads and writes DAT 72 and DDS-4
DAT 72 also reads and writes DDS-4 and DDS-3
DAT 72 also reads and writes DDS-4 and DDS-3
QuickSpecs
HP DAT Tape Drives
Product Highlights
DA - 11883 North America — Version 40 — March 29, 2013
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