Hmm, good question. I'm not sure of the answer. We have only been
running it for about 30 days so far. 

Under the covers it the appliance runs a customized Linux 2.6 kernel,
but customers only have a limited login shell, so I'm not sure what the
underlying filsystem type is.

Ben

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Paul Zarnowski
Sent: Wednesday, February 27, 2008 7:45 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] TSM dream setup

I'm wondering if there are filesystem fragmentation issues when using
devclass=file on an NFS mounted DD volume.  Filesystem fragmentation is
an issue when using devclass=file on most filesystems that I'm aware of.
How long have you been running this way on the DD?

At 06:22 PM 2/26/2008, Ben Bullock wrote:
>In the "best practices" document from DataDomain 
>http://www.datadomain.com/pdf/GlassHouse-TSM-DataDomain-Whitepaper.pdf
>and what other things I read, it sounded like the VTL "mimicry" is not 
>really needed in a TSM environment unless you are doing lan-free or 
>NDMP backups.

Paul Zarnowski wrote:
>I'm curious why you decided to use devclass=file volumes, instead of 
>using the DD580 as a VTL.  It does have a VTL personality, doesn't it?


--
Paul Zarnowski                            Ph: 607-255-4757
Manager, Storage Services                 Fx: 607-255-8521
719 Rhodes Hall, Ithaca, NY 14853-3801    Em: psz1 AT cornell DOT edu

The BCI Email Firewall made the following annotations
---------------------------------------------------------------------
*Confidentiality Notice: 

This E-Mail is intended only for the use of the individual
or entity to which it is addressed and may contain
information that is privileged, confidential and exempt
from disclosure under applicable law. If you have received
this communication in error, please do not distribute, and
delete the original message. 

Thank you for your compliance.

You may contact us at:
Blue Cross of Idaho 
3000 E. Pine Ave.
Meridian, Idaho 83642
1.208.345.4550

---------------------------------------------------------------------