The 3090 processor controllers ran VM/370 on 3370 (FBA) disks. I was able to actually see one of these at a large NYC shop in the 1990's while touring it with a friend who was the VP of Operations there. The 3270 screen inside the 3090 box had the VM/370 screen logo.
That made my day. I was a VM/VSE guy at the time and really resented the way that MVS shops looked down on us, as if we were deprived, backwards children. And you are right, the 3375's were 3370 boxes that emulated CKD on physical FBA geometry. Anyone remember 3310's? Smaller FBA brothers of the 3370 DASD, sold with 4331 low-end CPU's for VM/VSE usage. There was a special VSE version created in the mid 1980's (SSX/VSE) with simplified and largely menu-driven system generation and maintenance intended for sale with those low-end 4331 systems. The ISV I worked at then got to play with SSX/VSE to set up our product for menu-driven installation on one of those systems. Peter -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Dana Mitchell Sent: Wednesday, January 17, 2018 9:47 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: VSAM usage for ancient disk models Current (for us 2.1) z/OS HCD still shows 3375 as a valid DASD device type. IIRC 3375 was emulated CKD on FBA 3370 HDA's. I also think 3375s were used as the storage for the embedded 43X1's used as processor controllers on 3090s. Dana -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
