> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Chase, John > Sent: Thursday, January 17, 2008 8:49 AM > To: [email protected] > Subject: Re: Flash memory arrays > > > > -----Original Message----- > > From: IBM Mainframe Discussion List On Behalf Of McKown, John > > > > Only z/OS is stuck on ECKD formatted DASD. z/VM and z/VSE can > > both run on FBA. z/LINUX can run on FBA and/or on SAN/SCSI > > DASD. I think that the latest z/VM can also run on SAN/SCSI > > connected DASD as well. z/OS remains the hold out. For > > whatever reason that may be. > > Weaning z/OS from (E)CKD would likely be such a monumental > change as to > require that it be done at a version boundary and provide perhaps an > entire version life-cycle to complete. > > "Who knows" how much non-IBM code would have to be revisited > during the > transition? More than a few CBT utilities would be relegated to the > dustbin of history. > > It's probably also true that the longer such a transition is delayed, > the less likely it is to be attempted. > > -jc-
Hum, I see your point. My "concern" is the ongoing discussion around here as to why z/OS DASD costs more per gigabyte than the Windows or Solaris DASD. The reasons, as I see it, are two fold. First, the vendor must write, validate, and support the emulation software on their DASD array. Second, the vendor is "gouging" the z/OS shops "because we can". OK, the latter is cynical of me. Here is an idea to be shot down. Instead of having the ECKD emulation software on the DASD box, how about putting it in the SAP on the System z? I am not really aware of how powerful the SAP is or how "busy" it might be doing whatever it is that it does. If not the SAP, then another speciality engine. This may well be too difficult for the System z engines, and difficult to maintain. I.e. the mapping from a logical volume onto the physical volumes. OK, it was a stupid idea. What else is new with me? I guess I figured that if Hercules/390 could do it, a SAP should be able to as well. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. ---------------------------------------------------------------------- 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
