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:IBM-MAIN@bama.ua.edu] On Behalf Of Linda Mooney Sent: Thursday, March 29, 2012 4:59 PM To: IBM-MAIN@bama.ua.edu 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" <m...@mzelden.com> To: IBM-MAIN@bama.ua.edu 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 <darth.kel...@assurant.com> 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:m...@mzelden.com Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://expertanswercenter.techtarget.com/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN