Those rings can serve many purposes. Years ago we had a spy cam in the machine room with four lenses only one of which really worked. The operators figured out which was the active one and hung a tape ring off of it. That way they could always tell if the camera was pointed at them.
Robert Crawford Mainframe Management United Services Automobile Association (210) 913-3822 "Moy glaz! YA ne dolzhen dobavlyat' v nego puding!" - Tolstoy Please send requests to mainframe management through our front door at go/mfmfrontdoor -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Seymour J Metz Sent: Wednesday, January 19, 2022 1:35 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: EXTERNAL: Re: What not to do on a z/OS system... File protection ring? I've seen those in multiple colors. Easy to pull apart, until the random tough one popped up. -- Shmuel (Seymour J.) Metz https://urldefense.com/v3/__http://mason.gmu.edu/*smetz3__;fg!!GryZGb6B1VCs0SfC!Qsl_bxq7E9cN_Potq8RCiR3YAeGlYez8Fh7Sy0BEFZUNWOWI4AohL0xYAM_sUVFbo40$ ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of Carmen Vitullo [cvitu...@hughes.net] Sent: Wednesday, January 19, 2022 1:29 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: What not to do on a z/OS system... yellow ring frizbes :) On 1/19/2022 12:26 PM, Richards, Robert B. (CTR) wrote: > Same story, but a Yellow write ring tossed with force (think dodge ball). > Same result. > > Every time I notice a Plexiglas cover over the EPO button, I smile. > > Bob > > -----Original Message----- > From: IBM Mainframe Discussion List<IBM-MAIN@LISTSERV.UA.EDU> On > Behalf Of Lennie Dymoke-Bradshaw > Sent: Wednesday, January 19, 2022 1:05 PM To:IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: What not to do on a z/OS system... > > At my first job (1975) one of the programmers was chatting to the operators > and then lent against that red button on the wall. Shutdown the entire > machine room of course. > > Lennie > > -----Original Message----- > From: IBM Mainframe Discussion List<IBM-MAIN@LISTSERV.UA.EDU> On > Behalf Of Mike Shaw > Sent: 19 January 2022 16:44 > To:IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: What not to do on a z/OS system... > > We once had a data check we could not get past on a 3420 tape. This was > around 1980, MVS/SE 1 or thereabouts. The lead sysprog hit stop on the tape > drive, pulled the leading tape portion out of the vacuum column, rubbed it > gently back and forth between his finger and thumb, and slowly released the > tape back into the vacuum column. He hit start on the tape drive and we got > past the data check and read the rest of the data on that tape without a > problem. No blocks were missed. > > I thought that was magic at the time... > > Mike Shaw > MVS/QuickRef Support Group > Chicago-Soft, Ltd. > > > On Wed, Jan 19, 2022 at 10:31 AM Seymour J Metz<sme...@gmu.edu> wrote: > >> Back in the old days the R/W heads lifted up when you unloaded a >> tape and moved down when you mounted a new reel. One day an interlock >> didn't interlock and the R/W head mashed the hand of an operator. The >> damage wasn't permanent, but everybody was more cautious after that. >> >> >> -- >> Shmuel (Seymour J.) Metz >> https://urldefense.com/v3/__http://mason.gmu.edu/*smetz3__;fg!!GryZGb >> 6B1VCs0SfC!Qsl_bxq7E9cN_Potq8RCiR3YAeGlYez8Fh7Sy0BEFZUNWOWI4AohL0xYAM >> _sUVFbo40$ >> >> ________________________________________ >> From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on >> behalf of Cameron Conacher >> [000003cfc59146bb-dmarc-requ...@listserv.ua.edu] >> Sent: Wednesday, January 19, 2022 10:22 AM >> To:IBM-MAIN@LISTSERV.UA.EDU >> Subject: Re: What not to do on a z/OS system... >> >> A very long time ago, (mid seventies I think) I was loading a tape to >> a tape drive. >> A button on my jean jacket trapped the edge of my jacket sleeve >> inside the tape drive when as the glass closed. >> I stood patiently and waited for the tape processing to complete so >> the tape could unload. >> >> After that, I paid more attention when loading tapes. >> >> Thanks, >> >> .......Cameron >> >> >> >> >> >> From: IBM Mainframe Discussion List<IBM-MAIN@LISTSERV.UA.EDU> On >> Behalf Of Kirk Wolf >> Sent: Wednesday, January 19, 2022 9:41 AM To:IBM-MAIN@LISTSERV.UA.EDU >> Subject: [External] Re: What not to do on a z/OS system... >> >> Hooray! Now we've got the kind of thread that is the life blood of >> ibm-main :-) >> >> On Wed, Jan 19, 2022, at 7:21 AM, John McKown wrote: >>> I know of one MVT operator who trapped his girlfriend against a 3725 >>> communication controller and dropped a university's entire network. >>> Multiple sites. >>> >>> >> Kirk Wolf >> Dovetailed Technologies >> >> https://urldefense.com/v3/__http://secure-web.cisco.com/1cn5-HpTYfIre >> u2cSKoha63Y8gzW7Fj_PXrE92YSaO__;!!GryZGb6B1VCs0SfC!Qsl_bxq7E9cN_Potq8 >> RCiR3YAeGlYez8Fh7Sy0BEFZUNWOWI4AohL0xYAM_sD2Mec6U$ >> IYX4-Aa02x-L7Bs1YFxIRmL8cmskPf0sybkr9abzZzF199DWdz0Ykp9FHL5bGGt4xmkeT >> e >> L0BR-IP-4bbomeF9cRqRy_bfzwte8ereRwNUBuJpR-zoczTxEh9fDeQfNRfZH6VHksinm >> _ >> XjXYh733Xljj6PtqiGJfh7s1sGbZ79ymHznTYdxWdHlnBE67BXeYHYTdlkiFdjCovYB67 >> 4 >> dhzGy5dtMVsQ9iTkQKkBwt6w3SQjmsyzXEUWpv401TIfmhcItrgRlmrX75JqZBHJ-Dtzh >> A >> Y4N-beS9ilUZoOQRfGkSjj2c98ccwmf6vN9GYmKP0lA7nZNPFxlqPHXD-BM9eStbm1z-C >> B >> x7m40jwWuZxedUzGR2pA_y2ZoHHg4FdpvEZtlZOvONrzby1iyUtLqEoas/http%3A%2F% >> 2 >> https://urldefense.com/v3/__http://Fdovetail.com__;!!GryZGb6B1VCs0SfC >> !Qsl_bxq7E9cN_Potq8RCiR3YAeGlYez8Fh7Sy0BEFZUNWOWI4AohL0xYAM_s-L9lSys$ >> < >> https://urldefense.com/v3/__https://secure-web.cisco.com/1CMNJvovBdp9 >> yBnlyYMX7XDwMols2kkKGgmrwSROS__;!!GryZGb6B1VCs0SfC!Qsl_bxq7E9cN_Potq8 >> RCiR3YAeGlYez8Fh7Sy0BEFZUNWOWI4AohL0xYAM_snMqM0qI$ >> W0hnu2b_NKhNXLtkgwMMcPwd1HBr_ggnaz-jOwBW47DnVEGIt4bpW8COmjVD8XqVin4Eu >> - >> x_4HLZpGXoDORG_9Dib3tJq7_ABHXsnB_cOZ6onLOncz6m8qRxHlbuSRz29vFEJgKt_Mr >> a >> 5sXumBbRXeklvWffrMgCdm7h3-uIE-BE2zjT8qDyZa9w1nSg6wnBjmblwuVV6lUkPjJm9 >> N >> YO7sjt7IIE3oKSuCrBzJhb8dOF5aXoc4vT0JenP__8Xsug2eziZJMK48OUmxY5e-94ngr >> z >> sGRHaYOmnzU5tmHh4jet_pvGp2n0pooHyyoGJoI39jy-YnXJwIlOsQ4ks2OtnTA5u6L2r >> E >> 7KNygGdkGR6GXneZsk9vjAnS0Ih18ujwz99-0vUGfal7K8z518ZueSeQJL/https%3A%2 >> F >> %2Fisolate.menlosecurity.com%2F1%2F3735928037%2Fhttp%3A%https://urlde >> fense.com/v3/__http://2Fdovetail.com__;!!GryZGb6B1VCs0SfC!Qsl_bxq7E9c >> N_Potq8RCiR3YAeGlYez8Fh7Sy0BEFZUNWOWI4AohL0xYAM_sETlNjiI$ >> --------------------------------------------------------------------- >> - For IBM-MAIN subscribe / signoff / archive access instructions, >> send email >> tolists...@listserv.ua.edu<mailto:lists...@listserv.ua.edu> >> with the message: INFO IBM-MAIN >> ________________________________ >> American Express made the following annotations >> ________________________________ This e-mail was sent to you by a >> representative of Amex Bank of Canada, P.O. 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