First Full disclosure I do work for EMC with the DLm and MDL products,
therefore I will not enter into any discussions about one vs. the other (EMC vs
IBM vs STK). But I did want to clarify a few things since there seems to be
some old or inaccurate information (at least based on time).
EMC has 2 product lines the MDL and DLm as someone has stated the MDL
is generally thought to be for smaller shops. But the true difference is that
only EMC Data Domain storage can now be placed behind a MDL solution. MDL's of
the current generation only supports DD back ends (please note this is the time
reference, EMC still supports the other configurations customers have
deployed), and yes there are mainframe use cases where this makes sense (not
all but some). And now for something completely different EMC will change the
product names of the MDL in the near future from MDL1000 to DLM1010 and MDL2000
to DLM1020.
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of
Linda Mooney
Sent: Thursday, March 29, 2012 4:59 PM
To: [email protected]
Subject: Re: Tapeless solution (IBM or Sun) Enterprise class
We have a BusTech MDL. The doc also refers to it as MAS. It has performed
very well for us. We pur chased before EMC did, and ours is backed by NetApp
disk on a storage rack that is shared with a distributed system.
The following link is to a pretty good article -
http://www.computerworld.com/s/article/9195959/EMC_buys_mainframe_virtual_tape_library_vendor_Bus_Tech
Linda
----- Original Message -----
From: "Mark Zelden" <[email protected]>
To: [email protected]
Sent: Wednesday, March 28, 2012 10:43:01 AM
Subject: Re: Tapeless solution (IBM or Sun) Enterprise class
On Wed, 28 Mar 2012 10:15:26 -0500, Darth Keller <[email protected]>
wrote:
>>>Have you considered EMC DLm or Bus-tech MDL (EMC owns Bus-tech now).
>I have not worked with MDL (which I think is more of a "small shop"
>solution),
>but I have with DLm. I've also worked with VSM, but it was always
>>>backed by physical tape. BTW, the vendor is Oracle now, not Sun.
>
>
>So my understanding is the MDL was the HDS version of the DLM - the
>Bustech appliance ahead of HDS storage. We have an HDS MDL which uses
>an
>AMS2500 for back-end storage. It's also my understanding that the MDL
>is no longer available as such. HDS now sells the Falconstor's VTL instead.
>
>I would consider the DLM & the MDL to be roughly equivalent. We are
>very happy with the performance of the MDL.
>dd keller
>
Thanks for that clarification. I really don't know the history behind the
Bus-tech and I think I used "MDL" when I shouldn't have to refer to it pre- HDS
(or is that not even correct). Was the original just called "MAS" (Mainframe
Appliance for Storage).
Mark
--
Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS
mailto:[email protected] Mark's MVS Utilities:
http://www.mzelden.com/mvsutil.html
Systems Programming expert at http://expertanswercenter.techtarget.com/
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