>Deeply and completely disagree. DASD as a disk space - that's OK. DASD is more than disk space, these days. >However if you plan to use remote copy and PiT copy - then things are really >interesting.
I've used the big three vendors (IBM, EMC, and HDS), products and have found no major technological differences. >A lot of details (important ones!), parameters, options, hard to compare disrctly (incompatible solutions). I disagree. While implementation is slightly different, in each case, one is as good as another, as long as you are buying current technology. I've converted from one vendor to another, as a storage analyst, project leader, and using outside consultants. There is NO one feature, other than cost, that will make me pick one over the other. In my last acquisition, we went line by line over the features, and found not a single one that was glaring enough to pick one over another. Who cared if you needed an extra started task, or slightly different configs to do remote copy, or if the storage management web interface was slightly different? Even within the same vendor, things change in a 3-year period, which was usually the acquisition cycle due to warrantee periods. And, worrying about cache size/algorithms doesn't matter. What does is response. So, as long as it has enough space, and responds, the so-called differences make no difference. Gone are the days of when a techno-geek counted cache size, algorithms, and the like. All that matters is space, performance and such features as PAV, HIPERPAV, MIDAW, and so on. And, rarely are implementation details significant -- and rarely are they so incompatible that they make one vendor impossible to use -- that would not be in that vendor's interest. People still can read and learn. >Even cache memory is hard to compare. No need to compare. - I'm a SuperHero with neither powers, nor motivation! Kimota! ---------------------------------------------------------------------- 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
