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Ken,

were you using a specific software backup application, or using
Windows generic backup utility, or a TAR archive?

John

John Spencer
www.bridgemediasolutions.com


On Jun 9, 2005, at 7:46 PM, Ken Hansen wrote:

> I also would never trust DATA backup for longer than 5 years.
> The past two places I worked I found this out the hard way.
> Trying to restore 5 and 8 years old data respectively yielded horrible
> results.
> We then implemented a policy to have all Data tapes checked and re
> backed up to new AIT tapes with the understanding that those tapes
> would then be checked in 5 years time.
>
> -Ken
>
> On Jun 9, 2005, at 3:47 PM, John Spencer wrote:
>
>
>> This is an incorrect statement.  There are various backup
>> applications that will skip a bad block of data and continue the
>> restore process, as well as applications that will report on the
>> quality of the data archive as it is being written.  Error correction
>> is not a function of the data storage tape itself.
>>
>> And I would never trust a data storage tape to be readable 25-30
>> years from now.
>>
>> John
>> John Spencer
>> www.bridgemediasolutions.com
>>
>>
>> On Jun 9, 2005, at 2:36 PM, Jeffrey Kane wrote:
>>
>>
>>> I've seen the figure 25-30 years bandied about for data tape. Data
>>> backups
>>> are a double edge sword. They have better error correction so the
>>> data is
>>> more resilient. However, if there's an unrecoverable error it
>>> renders ALL
>>> data for that particular file (and if it's in the directory area,
>>> all data
>>> on the tape) unrecoverable. With digital audio tape the error only
>>> affects
>>> that portion of the recording.
>>>
>>>
>>
>>
>
>