I am thinking only of a SLED that was implemented without RAID, regardless of how real or quasi its CKD-ness was. I am satisfied with knowing that it was around 12/31/96 for the 3390 and possibly a little for the 9340, but only if the 9340 had no RAID mapping internally.
Bill Fairchild ----- Original Message ----- From: "Rex Pommier" <rpomm...@sfgmembers.com> To: IBM-MAIN@LISTSERV.UA.EDU Sent: Monday, June 2, 2014 12:39:28 PM Subject: Re: real vs. emulated CKD Bill, While I don't know when the 3390s last rolled off the assembly line, I believe they were all SLEDs. After that came the short-lived 9340/9345 subsystem which had a different track length than the 3390 (built on 5 1/4 inch drives), then the RAMAC II devices which might be what you're thinking of. These things emulated the 3990/3390 SLEDs on (I believe) 3 1/2 inch SCSI drives, packed 4 in a drawer in either a RAID1 or RAID5 configuration. I don't know how they compared to the 3390s performance-wise, but we replaced a bunch of 3380-Es with a combination of the 9340s and RAMAC IIs and they ran circles around the 3380s, not to mention taking up a LOT less floor space! :-) Rex -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of DASDBILL2 Sent: Monday, June 02, 2014 12:25 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: real vs. emulated CKD I will rephrase my question. When did any vendor last ship a 3390 DASD to anyone with non-RAID SLEDs inside for use on any kind of operating system which did not have direct support for FBA in its customer-usable access method repertoire? There must have been some kind of announcement made which is still findable online. IBM continued to manufacture and sell things after this date that they called 3390s but which were implemented internally with RAID, I believe. Bill Fairchild ----- Original Message ----- From: "Anne & Lynn Wheeler" <l...@garlic.com> To: IBM-MAIN@LISTSERV.UA.EDU Sent: Monday, June 2, 2014 9:55:46 AM Subject: Re: real vs. emulated CKD dasdbi...@comcast.net (DASDBILL2) writes: > I know it has been "decades" since IBM manufactured its last real CKD > controller, but what was the exact date when the last new one was > shipped? re: http://www.garlic.com/~lynn/2014g.html#82 Costs of core http://www.garlic.com/~lynn/2014g.html#83 Costs of core depends on how you differentiate CKD and FBA ... 3380 was already moving to fixed-block cells (track space calculations have 3380 rounding up to cell size). part of this is driven by increasingly sophisticated error correcting code technology being on fixed size blocks http://www.garlic.com/~lynn/2014g.html#75 non-IBM: SONY new tape storage - 185 Terabytes on a tape. fba-512 has been standard since the 70s with 3310s & 3370s ... but currently is move to fba-4096 ... as part of error correcting technology. http://en.wikipedia.org/wiki/Disk_sector the above has IBM sizes in 512, 1024, 2048, & 4096 in the 70s. The enhanced CMS filesystem introduced formating block size option ... but on 3310s & 3370s ... used multiples of 512byte physical blocks. however, industry standard transition to 4096 starting in 2007 continuing through Jan2011. IBM article on subject: http://www.ibm.com/developerworks/library/l-4kb-sector-disks/ -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN The information contained in this message is confidential, protected from disclosure and may be legally privileged. If the reader of this message is not the intended recipient or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any disclosure, distribution, copying, or any action taken or action omitted in reliance on it, is strictly prohibited and may be unlawful. If you have received this communication in error, please notify us immediately by replying to this message and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
