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The V91HD/DLT bulk eraser is a high energy, bulk eraser especially to tackle the erasing of hard drives and of DLT tapes.

Hard Drives

The vulnerability of information stored on PC hard drives is a recognized security risk. Unlike other PC data storage media the hard drive always stays with the PC. Every time a PC leaves a company’s control all the data and company information will go with it. Even if the hard drive breaks down the storage platters will still contain information that could be read once repaired. In keeping with our policy of recognizing user requirements we have introduced the V91 PC hard drive eraser. The V91 is capable of removing data from PC hard drives in less than 20 seconds. Although in most cases this will render the hard drive inoperative, the cost of a replacement hard drive cannot be compared to the cost to a company if sensitive information can be read by a third party. Even if only used infrequently the V91 provides a cost security solution to the protection of company, client and sensitive computer data.

DLT

To re-use your previously formatted DLT tape IV™ tapes in the new DLT1 tape drive, has introduced the V91 DLT Bulk Eraser. Anyone upgrading their existing DLT drive with the new DLT1 drive should understand that their existing inventory of recorded DLT tape IV™ media may not be usable in the DLT1 without thoroughly degaussing them before hand. Media recorded in either the DLT7000 or DLT8000 format will be automatically rejected to protect the data on the tape. Erasing all existing DLT tapes on the V91 bulk eraser easily solves the problem. The V91 will erase all old data and formats in 10 seconds leaving the tapes completely clear and ready to use in DLT1 drives.

Power Requirements	50 Hz/220-240V and 60Hz/110-115 VAC
Current Rating	9 amps typ.
Media Erased	3.5" & 5.25 PC Hard Drives; DLT tapes Other Media Erased: ½" Computer Tape, Diskettes – single/boxed, DC 600, 2000, TK50, 70, 85, 3480/3490E/3590E, 4mm/8mm/ Exabyte/Travan, DLT, DAT, ZIP Disk
Throughput per Hour	20 Hard Drives Typ or 180 DLT tapes
Degaussing Force	4000 gauss
Power Requirements	50 Hz/220-240V and 60Hz/110-115 VAC
Current Rating	9 amps typ.
Duty Cycle	20% typ.
Dimensions	Height: 6" (150mm) Width: 16.5" (420mm) Length: 19" (480mm)
Net Weight	59.4lbs (27kgs)
Options	Security Key; Din Pin; IBM Hub adaptor; NAB Hub adaptor

ATTENTION WHEN DEGAUSSING: Please note the following suggestions when using a Degausser:

Watches:

Remove your wristwatch when using the Degausser. Direct exposure to the magnetic field may damage some watches.

Magnetic Strip Cards:

Do not place your wallet or purse containing credit or phone cards directly on or above the conveyor belt. Magnetic strip cards are very easy to erase. However, having a wallet in your back pants pocket while using the Degausser will not erase the cards.

Tape storage:

Store videotapes you do not intend to erase approximately four feet from the Degausser. This will eliminate the opportunity for the operator to accidentally run “good” tapes through the Degausser.

Placement of Tapes:

When erasing tapes, place them on the left edge of the belt (as you face the machine). In order they may travel the full length of the conveyor belt for quality erasure.

Pacemakers:

Do not operate the Degausser if you have a pacemaker.
ABOUT DEGAUSSING MAGNETIC MEDIA

An alternating current (AC) bulk eraser (Degausser) is used for complete erasure of data and other signals on magnetic media. Degaussing is a process where magnetic media is exposed to a powerful, alternating magnetic field. Degaussing removes any previously written data, leaving the media in a magnetically randomized (blank) state.

The Degausser must subject the media to an alternating magnetic field of sufficient intensity to saturate the media. Then the Degausser by slowly withdrawing or reducing the field leaves the magnetic media in a magnetically neutral state.

To erase recorded data, it is necessary for the strength of the degaussing field to be greater in value than the coercivity of the magnetic media. Simply stated, coercivity is the magnetic field strength, rated in oersteds (Oe), required to change the magnetic orientation of the magnetic material. Check with knowledgeable dealers or Degausser manufacturers to identify Degausser models that meet your requirements. Examples of typical coercivities for computer magnetic tapes and disks are shown in table I.

Data is typically not lost until its level has been decreased 65% to 75% (or more) below its original saturation recording signal level, dependent upon the drive system.

A complete erasure level, for most users, is considered to be 60 dB below the original signal level – this of course depends on user requirements. A 60 dB signal decrease equates to reducing the signal to one tenth of one percent of its original value.

Magnetic media products that have factory pre-recorded magnetic servo patterns should not be degaussed. Degaussing would erase the factory written magnetic servo signals and leave the media unusable. For all other magnetic media (without magnetic servo signals), after proper degaussing, the quality of subsequent data recording should be unchanged or even improved.

It is very important to understand and follow the Degaussers operating instructions. This is especially important for manual units where the operator controls the media’s movement through the degaussing field. For higher coercivity media, four passes are often recommended – two passes, with a 90 degree rotation for the second pass, and then repeat the process with the media turned upside-down. Of course, these and other important operating considerations will vary with the type, power and construction of the individual Degausser models.

DEGAUSS STRENGTH REQUIRED

MAGNETIC TAPE PRODUCTS	TYPICAL COERCIVITY	COMMENTS
9-Track Reel-To-Reel Computer Tape	300 Oe
TK50, TK70	350 Oe
3480, 3490 OE	520 Oe
SLR1, SLR2, TR-1, DC2120, DC6150	550 Oe
SLR3, SLR4, SLR5, TR-3, DC9100	900 Oe
SLR24, SLR32, TR-4, ADR30, ADR50	900 Oe	Do Not Degauss, See Note 1
TR-5, SLR40, SLR50, SLR60, SLR100	1650 Oe	Do Not Degauss, See Note 1
DLT tape III, DLT tape IIIXT	1540 Oe
DLT tape IV	1850 Oe
SuperDLTtape1	1900 Oe
D8: 8mm 112m, 8mm 160m	1600 Oe
DDS1: 4mm 60m, 4mm 90m	1590 Oe
DDS2 4mm 120m	1750 Oe
DDS3 4mm 125m	2250 Oe
DDS4 4mm 150m	2350 Oe
DD-2 19mm	1550 Oe
DD-2QD (Quad Density) 19mm	1850 Oe
DTF-1	1579 Oe
DTF-2	2300 Oe
Redwood SD-3	1515 Oe
Magstar MP: 3570-B, 3570-C, 3570-C/XL	1625 Oe	Do Not Degauss, See Note 1
Magstar: 3590, 3590-E	1600 Oe	Do Not Degauss, See Note 1
STK-9840, STK-T9940	1625 Oe	Do Not Degauss, See Note 1
LTO-Ultrium1	1850 Oe	Do Not Degauss, See Note 1
Mammoth 8mm, AIT-1 8mm, VXA-1 8mm	1320 Oe
AIT-2 8mm	1380 Oe
M2 Mammoth2 8mm	1350 Oe

MAGNETIC TAPE PRODUCTS	TYPICAL COERCIVITY	COMMENTS
3.5” 720KB DD Microdisk	650 Oe
3.5” 1.44MB HD Microdisk	720 Oe
5 ¼ 360 KB DD Minidisk	300 Oe
5 ¼ 1.2Mb HD Minidisk	650 Oe
Zip 100 MB Disk	1550 Oe	Do Not Degauss, See Note 1
Zip 250 MB Disk	2250 Oe	Do Not Degauss, See Note 1
SuperDisk 120MB	1500 Oe

* NOTE 1: DO NOT DEGAUSS

This product has factory prerecorded magnetic servo tracks. The media will be unusable, if the servo tracks are bulk erased (degaussed). Products that use factory prerecorded magnetic servo signals should not be degaussed unless destruction of the recording media is desired.

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