Ron, You mentioned compression. Please correct me if I am wrong. All the dsns on ML1 are compressed? Thanks.
--- On Tue, 4/20/10, Ron Hawkins <ron.hawkins1...@sbcglobal.net> wrote: From: Ron Hawkins <ron.hawkins1...@sbcglobal.net> Subject: Re: DFHSM QUESTION - MOVING TO DASD FROM TAPE - ML2 To: IBM-MAIN@bama.ua.edu Received: Tuesday, April 20, 2010, 12:46 PM Darth, The ML1 and ML2 are usually cheaper and lower performance than Primary Storage. ML1 cost efficiency is usually achieved through compression, whereas ML2 is a change in media. ML2 Tape can easily be replaced with Tier 2 disk using internal SATA, external virtualized midrange storage, or earlier generations of DASD disk systems with a reduced maintenance cost (I think Radoslaw did this with 7700E). Ron > > > If I understand this correctly, you're going to have 2 levels of migration > both on Disk? Even if that's possible, what does it gain you? Wouldn't > it make more sense to just have an ML1 and then no ML2? And again, I > question whether that's even possible with HSM. > > I do seem to remember this same discussion in the past, so you should > probably check out the archives. We're actually going the other route - > we're moving to a 'tapeless' virtual tape system & I'm eliminating ML1. > > ddk > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
