> -----Original Message-----
> From: IBM Mainframe Discussion List 
> [mailto:ibm-m...@bama.ua.edu] On Behalf Of Larry Macioce
> Sent: Friday, October 08, 2010 10:24 AM
> To: IBM-MAIN@bama.ua.edu
> Subject: When will MVS be able to use cheap dasd
> 
> A colleague and I were talking as we feel the powers to be 
> are looking 
> at "options other than the mainframe". The talk went to 
> dollars and cents I 
> stated the price of a z box has dropped big(for our size 
> shop) but the cost of 
> purchasing dasd is still high along with maint.
> His question was why can't mvs use scsi or san dasd, VSE and VM can.
> We looked around the web could find nothing on it.
> Thoughts??
> thanks
> Mace

FlexCUB. But it only supports Escon, not Ficon. It emulates 3390 on SAN / PC 
type disk.

I think part of the problem is with the support for legacy PDS and files with 
"hardware keys". Searching a PDS directory for a member is a very simple CCW 
chain. And is used a lot in IPL and NIP. So the first thing that would need to 
be done is to have IPL and NIP be able to support PDSE. Or, even better, 
something which has "members" but is superior to PDSE. I don't know why z/OS 
cannot use the CMS file system. It works, as you said, for z/VM. Or use 
whatever z/VSE uses for its libraries. I'm not z/VSE literate. And then there 
is the VTOC. It also has hardware keys. Now I'm curious how z/VSE supports FBA 
disks. Time to go look at some books.

--
John McKown 
Systems Engineer IV
IT

Administrative Services Group

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