>I should also point out a new idea: networked VTS. It's NOT new, unless you consider 2001 technology new. We were outsourced in 2001, and IGS Canada had to deliver a GDPS solution, with duplexed DASD and Tape. And, it had a fixed cost; if IBM went over, they ate it. Mind you, we got into many creative accounting exercises. Of course, we did for outages, maintenance vs projects and others.
>The IBM TS7740 (and I'm sure some others) has the ability to be networked with >other TS7740's to automatically replicate virtual tapes. And, predecessors. >Unlike the DASD XRC/PPRC solutions, the network pipe can be sized on average >loads and be a bit smaller (less expensive). Actually, that's not always true. Unlike DASD, I/O is not propogated for each individual block. But, at the end of the volume, the entire contents are sent to the back-up VTS. I don't know if it's still the case, but that impacted mount times, because the next tape can't be mounted until its predessessor is written and acknowledged. So, a slow network can be a pain! - Too busy driving to stop for gas! ---------------------------------------------------------------------- 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
