[wellylug] Magnetic tape question

[Lindsay Hunter]

I will look it out.

Lindsay
934 1702 at home evenings

Peter Jones wrote:

>DLT cartridges are 105mm square and contain a single reel of 1/2" tape.
>(Very similar to IBM 3480 but much greater data capacity).
>
>The only checking method that I am aware of would be to load the tape
>into the DLT 1 drive and see if they can be written to. At present they will
>load okay, but the backup program* says they are write protected 
>(which they are not, write protection on a DLT cartridge is by moving
>a slide on the cartridge case.) Because they show as write protected, 
>it is not possible to try and over-write / erase / format them
>*tried Veritas and W2Ks native backup program
>
>OTOH if you have an eraser I would like to try that if possible.
>Peter
>
>-----Original Message-----
>From: Lindsay Hunter [mailto:klhunter at paradise.net.nz]
>Sent: Sunday, 21 December 2003 4:25 a.m.
>To: wellylug at lists.naos.co.nz
>Subject: Re: [wellylug] Magnetic tape question
>
>
>Have you tried the bulk eraser used in doing 1/4 inch audio tape?  The 
>worked on 7" reels by rotating the reels with the eroaser running.  It 
>was just a 50 cycle ac field that redistributed the magnetism.  I may 
>have one here.  Long time since I needed to use it.  Do you have a 
>checking method?  I am trying to recall the dimensions of the tapes you 
>are processing.
>
>On the other hand, other magnetic media is erased by deleting and 
>rewriting on the tape.  Is that not practicalble?
>
>Lindsay
>
>Peter Jones wrote:
>
>  
>
>>As another poster noted, it looks like I'm SOL. Bit of a pisser as the
>>    
>>
>tapes
>  
>
>>are around $80
>>to replace and we have quite a large box of them.
>>
>>I tried various recording studios but they don't have anything of the
>>strength required
>>
>>Peter
>>
>>
>>-----Original Message-----
>>From: Colin Klenner [mailto:colink at clear.net.nz]
>>Sent: Thursday, 18 December 2003 7:31 p.m.
>>To: Wellington Linux Users Group
>>Subject: RE: [wellylug] Magnetic tape question
>>
>>
>>Further investigation again has yielded some more information - the
>>electric units are still not giving out a good enough field to do much
>>good/damage to the tapes.
>>
>>Colin
>>
>>On Fri, 2003-12-19 at 00:37, Brenda Wallace wrote:
>> 
>>
>>    
>>
>>>maybe you should try a train instead?
>>>
>>>On Fri, 2003-12-19 at 00:32, Klenner, Colin wrote:
>>>   
>>>
>>>      
>>>
>>>>I was suggesting it based on some background information I have on
>>>>     
>>>>
>>>>        
>>>>
>>something
>> 
>>
>>    
>>
>>>>that happened in London underground - hmm maybe even our electric units
>>>>would be better.
>>>>
>>>>I asked a person knowledgeable about the busses and he said they would
>>>>     
>>>>
>>>>        
>>>>
>>not
>> 
>>
>>    
>>
>>>>generate a strong enough field to do the tapes over.
>>>>
>>>>Colin
>>>>
>>>>-----Original Message-----
>>>>From: wellylug-admin at lists.naos.co.nz
>>>>[mailto:wellylug-admin at lists.naos.co.nz] On Behalf Of Damon Lynch
>>>>Sent: Wednesday, December 17, 2003 1:04 PM
>>>>To: wellylug
>>>>Subject: RE: [wellylug] Magnetic tape question
>>>>
>>>>
>>>>On Thu, 2003-12-18 at 01:47, Klenner, Colin wrote:
>>>>     
>>>>
>>>>        
>>>>
>>>>>Try taking a trolley bus through town, placing tapes on floor if 
>>>>>possible near the motor - the magnetic field from them should be more 
>>>>>than sufficient.
>>>>>       
>>>>>
>>>>>          
>>>>>
>>>>You are speaking from experience here... and if so, by accident or
>>>>     
>>>>
>>>>        
>>>>
>>design!!
>> 
>>
>>    
>>
>>>>Damon
>>>>
>>>>
>>>>-- 
>>>>Wellington Linux Users Group Mailing List: wellylug at lists.naos.co.nz To
>>>>Leave:  http://lists.naos.co.nz/mailman/listinfo/wellylug
>>>>     
>>>>
>>>>        
>>>>
>>>-- 
>>>Brenda Wallace <brenda at wallace.net.nz>
>>>   
>>>
>>>      
>>>
>
>  
>