> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Hal Merritt > Sent: Wednesday, January 11, 2006 1:45 PM > To: [email protected] > Subject: Re: DFSMShsm & 3592 carts & money > > > Forgive me guys, I don't get it. All HSM does is move data from cheap > DASD to expensive tape and back. I doubt it even does much compression > on modern DASD or tape. It just shuffles data around. Yes, HSM offers > some nice management features, but are they worth the price? > > We have about 2 TB over two sites. We look at HSM from time > to time, but > just don't see a business case. We end up just buying more DASD. > > Unless, of course, you are a competitor. If so, then by all means do > things just because that's the way you have always done > things ;-) Our > sales people thank you. > > My $0.02.
We use DFHSM as a storage manager. It is significantly less expensive to buy a few tapes at a time than to buy a new DASD array, or increase the size of the current array. It is simply easier to justify to the Powers That Be. Just like it is easier to justify a new Windows Intel server than a new zSeries mainframe. The "bite" is less at a time. Long term? Well, long term around here is like 3 months. DFHSM is a "band aid" we use because we cannot force users to manage their DASD usage. So, we migrate it from DASD to tape, then eventually delete it. This is a "political" fix. Other than that, I agree that keeping it DASD resident would be better. -- John McKown Senior Systems Programmer UICI Insurance Center Information Technology This message (including any attachments) contains confidential information intended for a specific individual and purpose, and its content is protected by law. If you are not the intended recipient, you should delete this message and are hereby notified that any disclosure, copying, or distribution of this transmission, or taking any action based on it, is strictly prohibited. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
