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How much data can TAPE store?

 
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gnaveenkumar.99

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PostPosted: Mon Jan 28, 2013 9:15 am    Post subject: How much data can TAPE store?
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How much data can TAPE store?
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Robert Sample

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PostPosted: Mon Jan 28, 2013 9:21 am    Post subject:
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How high is UP?

Your question has the same answer as mine. That is, the answer depends - for your question, a 3480 tape and a 3490 tape and a 3490E tape and a 3490J tape and a 3590 tape (etc) all hold different amounts of data. And the answers vary from 200 MB to 35+GB. You would be MUCH better off asking your site support group about the capacity of the tapes in use AT YOUR SITE.
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Gary McDowell

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PostPosted: Mon Jan 28, 2013 6:20 pm    Post subject:
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I was advised by our tech support group a few years ago that our 3490 tapes hold approximately 500 megabytes of storage.
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Robert Sample

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PostPosted: Mon Jan 28, 2013 7:28 pm    Post subject:
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There's also hardware compression to consider. A 3490E, for example, is typically able to hold 800 MB -- but if compressed, 2.4GB can fit on it (according to IBM's statements). A 3590E maxes out at 60GB but it may be 20GB or 40GB while a 3590 is 10/20/30 GB.

Like I said -- how high is UP?
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Nic Clouston

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PostPosted: Tue Jan 29, 2013 1:58 am    Post subject:
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Are you talking about a generic unit type, one volume or multi-volume?
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Gary McDowell

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PostPosted: Tue Jan 29, 2013 3:07 am    Post subject: Re: How much data can TAPE store?
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gnaveenkumar.99 wrote:
How much data can TAPE store?

For Scotch tape, none. [just kidding...]
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Dale Robertson

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PostPosted: Wed Jul 10, 2013 9:24 pm    Post subject: Revisit
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Gary,

Quote:
For Scotch tape, none. [just kidding...]


icon_lol.gif that was the 1st thing i thought about too.

gnaveenkumar.99

Quote:
How much data can TAPE store?


read what Robert and Gary wrote and then ponder what Nic wrote then multiply that by 255 or the max number of volumes and you have your answer.

also one item that Robert brought up:

Quote:
There's also hardware compression to consider


i did some checking many moons ago with 3490E's and compression. first it is the default and secondly if it is turned off it is counterintuitive that uncompressed tape files will not only be slower it will be massively slower!!!! so the compression is not just with software such as the way SAS does compression [which makes compressed files slightly slower] but with hardware similar to the way IBM compresses extended sequential data sets in that it is faster compressed than uncompressed because of attached hardware.

r

Congress is like a trash compactor. It turns 20 pounds of garbage into 20 pounds of garbage.
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Pete Wilson

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PostPosted: Wed Jul 24, 2013 6:35 pm    Post subject:
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Have a look at all the various TAPE hardware vendor websites to see what they quote.

If you only want to know about TAPE at your site then ask your hardware/storage/sysprogs teams what type of tape devices you have at your site and they can probably tell you the native and/or compressed capacities of whatever they are. There could be a mix of various types. You also have to consider if it is REAL tape or Virtual tape, or a combination of the two and if dedupe is being used.

Bear in mind you can have TAPE for Z/OS and TAPE for off-host type systems as well, and they can be very different

In any case, it is an extremely inane question to put to a forum such as this! Think before you type.
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