Re: [ADSM-L] VTL Tape Size

Some considerations:
- This varies with the different VTL vendor's, but some had a maximum number of Virtual Tapes that was allowed in the system, which would argue for larger volumes. - On the other hand, smaller volumes reduce the amount of reclamation you have to do (depending on your data)
- If you ever want to export to physical tapes, you might want to just use the same size that you are emulating. I.E. 400GB for LTO3

I ended up going with 200GB volumes for everything, and it seems to work well. I might consider something smaller if I was redoing it today.

Regards,
Shawn
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Shawn Drew

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Karel.Bos AT ATOSORIGIN DOT COM

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07/07/2009 11:06 AM

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Subject	Re: [ADSM-L] VTL Tape Size

Hi, I think your volume size should be something fitting the data type going into the storage pool. Putting 100GB exchange db files on 10gb volumes or 1kb files on 100GB volumes doesn't seem efficient. Regads, Karel -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of Huebner,Andy,FORT WORTH,IT Sent: dinsdag 7 juli 2009 16:36 To: ADSM-L AT VM.MARIST DOT EDU Subject: VTL Tape Size We are about to bring up new TSM servers and one of questions that has come up is how big to make the VTL tapes? We currently use 100GG and have tried 10GB with our test server. The question is what size it popular and why? Andy Huebner This e-mail (including any attachments) is confidential and may be legally privileged. If you are not an intended recipient or an authorized representative of an intended recipient, you are prohibited from using, copying or distributing the information in this e-mail or its attachments. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete all copies of this message and any attachments. Thank you.


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