Thanks for the clarification. It was my assumption based on guess what the announcement meant, but left unsaid. I can see how the life of the SSD would not really be of any concern. I still like the concept of having IPL and NIP somehow resident on the SSD for very fast loading. Perhaps in z/OS 2.3 <grin>.
-- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets® 9151 Boulevard 26 • N. Richland Hills • TX 76010 (817) 255-3225 phone • [email protected] • www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets® is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. –The Chesapeake Life Insurance Company®, Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] > On Behalf Of Elpida Tzortzatos. > Sent: Thursday, August 30, 2012 3:19 PM > To: [email protected] > Subject: Re: The IBM zEnterprise EC12 announcment > > John, > > Your comment in regards to when RSM sends paging data to flash is not > accurate. If flash is available to a z/OS partition it will preferably > be used for all paging data except for data needed for warm/quick > starts like VIO. PLPA will be placed on both disk and flash . We use > the PLPA disk copy for warm starts and the flash copy to resolve any > PLPA page faults. All other paging data should go to flash as the first > choice. > > Currently you can not IPL a z/OS system from "Flash Express". > > In term of write endurance it should not be a concern, a lot of smart > IBM engineers looked at the numbers and the life expectancy of the z > "Flash Express" card pair should outlive its technology use. We expect > customers will migrate to the next generation of flash technology long > before wear out becomes an issue. In addition to "wear leveling" > algorithms exployed at the SSD level, and over provisioning, additional > z write reduction algorithms were used to extend the life of the SSDs. > > Elpida Tzortzatos > [email protected] > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
