I assume you plan to use a de-duplicating storage device.

8Gb FC tends to be faster than 10Gb Ethernet.
File systems tend to be easier to manage.
VTL option tends to cost more.
Ethernet in, FC out splits the I/O across more adapters without the joy of 
routing tables.
File systems allow you to smile and answer the auditor's question about what 
tape the data is on and say, "What is this tape you speak of?"

The one that is better is the one that you build your system to use.  I believe 
I could successfully argue either way.  I have systems working both ways and I 
tend to prefer file system, but most of my Ethernet networks will not handle 
file system so I use mostly VTL.

I should note my backend of choice is a Data Domain.

Andy Huebner

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Meuleman, Ruud
Sent: Tuesday, November 05, 2013 10:21 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] virtual tape library versus disk

Hi,

Does anybody knows what are the advantages and disadvantages of using virtual 
tape library instead of "normal" disks for TSM storage pools?

Kind Regards,
Ruud Meuleman

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