W dniu 26.06.2020 o 17:04, Grant Taylor pisze:
On 6/26/20 3:16 AM, R.S. wrote:
3. 18 months is close to half of typical service contract for new dasd array. Still we don't know how sure is 18 months - maybe it would be 36 months? Even 12 months means the dasd array would have some residual value.

n00b questions:

1)  Is it possible to migrate from old DASD to new DASD?

Obviously YES. And it is quite simple, IMHO simpler than in distributed systems world.
I did it many times.


2) How disruptive would this be to the day-to-day operation of the existing mainframe?

Do you mean migration? For parallel sysplex it can be non-disruptive. However even for the most basic configuration (monoplex, no tools like TDMF) it can be single short night outage.


3) What sort of prerequisites exist for this?

Almost nothing except skilled personnel, maybe one or two persons.
In order to connect new DASD you need some FICON ports, but even that is not necessary, depending on details.


I have some experience with this in the Open Systems environment, but I'd like to know more about how such a storage migration would be done in the mainframe world.

I have some comparison to Windows world and IMHO storage migration inn mainframe is simple and straightforward.




--
Radoslaw Skorupka
Lodz, Poland





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