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тАО11-25-2003 02:10 AM
тАО11-25-2003 02:10 AM
Does hardware compression impact backward readability?
the hardware compression will not prevent the tape being read by later models and versions of DDS drives, even if the time span between the two models is several years?
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тАО11-25-2003 03:11 AM
тАО11-25-2003 03:11 AM
Re: Does hardware compression impact backward readability?
You are asking what the future looks like! Anyone who suggests you can be 100% certain of any prediction, certainly for several years out, should perhaps be treated cautiously...
However history shows that usually such features as hardware compression may/will be enhanced but almost always in a "backwards compatible" way - i.e.the new box can read/work with/handle the old stuff.
So you should be OK but, remember the 3 rules of computing:
a) Take a copy
b) Take another copy
c) take another copy in a different way & put it (physically) somewhere else..
Regards
Eric
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тАО11-25-2003 07:01 AM
тАО11-25-2003 07:01 AM
Re: Does hardware compression impact backward readability?
Given that I still see DDS-1 drives in use (14 year old technology), it is reasonable to assume that the current DDS-5(DAT72) drives will be around a while as well.
\
-Josh
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тАО11-26-2003 12:16 AM
тАО11-26-2003 12:16 AM
Re: Does hardware compression impact backward readability?
If this is a big worry for your organisation, get an EMC Centera or similar. The whole point of it is that it will allow you to store every version of a file for years to come. Well, that's *one* point of it, anyway - I'm sure EMC Sales could come up with more :)
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тАО12-03-2003 07:15 AM
тАО12-03-2003 07:15 AM
Re: Does hardware compression impact backward readability?
If someone's server + tape drive are stolen and they need to buy a new drive to restore their system from tape: could there be cases where having written the tapes using hardware compression prevents them from being readable on the new drive ?
Can we therefore safely advise people to use hardware compression ?
Thanks in advance,
Andrea
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тАО12-03-2003 07:43 AM
тАО12-03-2003 07:43 AM
Re: Does hardware compression impact backward readability?
Note: some new tape technologies limit how far back they read as far as physical formats (e.g. SDLT600 will only read back to SDLT320 and VS160).
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тАО12-03-2003 06:34 PM
тАО12-03-2003 06:34 PM
Re: Does hardware compression impact backward readability?
There is always a limitation in backwards compatiblity with DDS drives, I don't belive hardware compression or not makes any difference.
Perhaps more important, DDS media in general is not very reliable. If you want to use medias for long time archiving you may look at DLT,SDLT or Ultrium technology.