4MM DAT Tape
Digital Data Storage (DDS) is a format for storing and backing up computer data on tape that evolved from the Digital Audio Tape (DAT) technology. In 1989, Sony and Hewlett Packard defined the DDS format for data storage using DAT tape cartridges.
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Turtle Cases
Perm-A-Store, Inc. is the worlds leading manufacturer of permanent storage cases for vital computer backup tapes
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Tactical Weapon Racks
SecureIt Tactical weapons storage platform quickly adapts to any weapons system and through the use of industry standard materials handling components and products, stores any and all ancillary items efficiently.
Weapons storage
Durability
14 Gauge all steel construction is used throughout the rack. Heavier gauge construction stands up to the most adverse conditions. Bi-folding or hinged door panels are designed and formed to enhance strength and maintain integrity under the most demanding conditions. Racks can accept 2 padlocks for dual security or 1 lock with a provision for security bands.
Affordability
Through the use of existing manufacturing processes and standardized components, SecureIt Tactical Racks are the most cost effective means to store and secure police and tactical weaponry.
Efficiency
Tactical racks require the smallest footprint. Racks secure 12 rifles per row in a 15”x36” footprint. Other racks hold 10-12 in a 16”x42” footprint. Model 72” and 84” racks can hold 2 rows of rifles. Bi-folding doors allow for use in tight spaces and optimize mobile aisle storage systems. Model 72 and 84 racks store up to 24 rifles which cuts the required number of locks and keys in half.
Internal
Individually adjustable components quickly secure any modern infantry weapon without removing attached optics or electronics. Modular bins allow armorers to secure, organize and store the wide variety of weapon attachments that are being added to their inventories (optics, lights, etc.) Racks can be reconfigured in minutes without tools.
All Tactical Racks meet AR 190-11 & OPNAVINST 5530.13C military requirements for arms storage.
All Tactical Racks are 36” wide by 15” Deep
Model 44
44” tall stackable racks maintain clearance in tight spaces and when mounted on mobile carriage system.
Model 72
72” tall capable of storing virtually any infantry weapon, from M107 Sniper rifles to M2 .50Cal machine guns. Rack can also store 2 rows of M4 carbines.
Model 84
84” tall is the most efficient use of space available in an armory today. Racks are shipped with components to store 2 rows of rifles. Designed for low ceiling and or sprinkler/electrical clearance
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DDS uses a 4-mm tape. A DDS tape drive uses helical scanning for recording, the same process used by a video recorder (VCR).
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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. When restoring a backed-up file, the restoring software reads the directory of files located at the beginning of the tape, winds the tape to the location of the file, verifies the file, and writes the file onto the hard drive.
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DDS cannot update a backed-up file in the same place it was originally recorded. In general, DDS requires special software for managing the storage and retrieval of data from DDS tape drives.
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There are five types of DDS drives:
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4mm Tape DDS1 (DDS-1): Stores 2gb native (4gb compressed) of data on a 90m cartridge.
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4mm Tape DDS2 (DDS-2): Stores 4gb native (8gb compressed) of data on a 120m cartridge.
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4mm Tape DDS3 (DDS-3): Stores 12gb native (24gb compressed) of data on a 125m cartridge. Uses PRML (Partial Response Maximum Likelihood). which eliminates electronic noise for a cleaner data recording. Native transfer speed: 1-1.2mb/sec; 2mb cache.
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4mm Tape DDS4 (DDS-4): Stores 20gb native (40gb compressed) of data on a 150m cartridge. 4mm Tape DDS4 native transfer speed: 2.4-3mb/sec; 8-10mb cache.
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4mm Tape DDS5/72 (DDS-5): Stores 36gb native (72gb compressed) of data on a 170m cartridge. 4mm Tape DDS5 native transfer speed: 3-3.5mb/sec; 8-16mb cache.
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A 4mm Tape DDS cartridge needs to be retired after 2,000 passes or 100 full backups. You should clean your 4mm Tape DDS tape drive every 24 hours with a cleaning cartridge and discard the cleaning cartridge after 30 cleanings. 4mm Tape DDS tapes have an expected life of at least 10 years.
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