> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Clark Morris > Sent: Thursday, January 17, 2008 8:23 AM > To: [email protected] > Subject: Re: Flash memory arrays > > > On 16 Jan 2008 08:57:35 -0800, in bit.listserv.ibm-main you wrote: > > >EMC announced DMX4 disk system ...without disks. Flash > memory would be > >used as a disk module. > >Questions/observations: > >1. End of magnetic platters ? > >2. Another level of virtualization (or translation). Flash device > >emulates disk module. Disk modules are used for CKD emulation. > >3. Maybe there is no reason to force MVS to support FBA > devices (as it > >would become fading technology), it is more far sighted to implement > >"technology of the future" - natively operated flash memory. > > Au contraire. My USB key is FBA formatted in 512 byte sectors (I > think it is one of the FAT formats available to Win 98 or earlier). > FBA is oriented to both disk and even more so, solid state. There are > a number of limitations in CKD that will be painful to eliminate and > even if they are we are still left with a KLUDGE for which the phase > out should have started 25 years ago.
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. -- 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
