Probably they ran all jobs relates to the payroll from that office for confidenciality
-----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Jay Maynard Sent: Wednesday, June 25, 2025 10:36 AM To: [email protected] Subject: Re: 3420 environmentals? CAUTION EXTERNAL EMAIL: DO NOT open attachments or click on links from unknown senders or unexpected emails. I once worked in a shop where there were two 3420s and a 3803 in the financial area, in a separate room from the offices with a raised floor. Apparently, it was right at the limit for bus and tag. I don't remember why they needed to mount and store their own tapes, though. On Wed, Jun 25, 2025 at 9:06 AM Harry Wahl < [email protected]> wrote: > Phil, > > Here is a link to the applicable physical planning guide with requirements: > > > https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fbitsa > vers.informatik.uni-stuttgart.de%2Fpdf%2Fibm%2F370%2Ffe%2FGC22-7064-13 > _Input_Output_Equipment_Installation_Physical_Planning_Mar93.pdf&data= > 05%7C02%7CDaniel.Casas%40EVERTECINC.COM%7Ccedac0132b4348b7a36208ddb3f5 > a40a%7C2b5b7d77f19b4c6db1805768c09ad43b%7C0%7C0%7C638864589894175641%7 > CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlA > iOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=g%2BQ > q0qWcE0mLK2Ppi4Tq8Qo%2F1b%2BdJe6XlnbZgv%2FeZrA%3D&reserved=0 > > Look on page 112. > > When I worked for IBM in the 1970s I saw a few running in offices > sometimes with a 3803 sometimes without. Usually with the channel or > control unit cables snaked under or through a wall. The intent was to > keep people out of the mainframe room. > > Also, they required 3-phase electricity and the floor had to checked > to make sure it could support the weight. Standard building codes > specify how much weight an office floor must support and it was much > less than the 3803/3420's weight so a licensed engineer had to certify > that that particular floor could support its weight. > > Dr. Harry J. Wahl > ________________________________ > From: IBM Mainframe Discussion List <[email protected]> on > behalf of Phil Smith III <[email protected]> > Sent: Wednesday, June 25, 2025 9:19 AM > To: [email protected] <[email protected]> > Subject: 3420 environmentals? > > Anyone remember whether 3420s had to be in a chilled room or not? > Could you have had one in a regular office? I forget how much heat they put > out. > > ---------------------------------------------------------------------- > 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 > -- Jay Maynard ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN WARNING: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please delete it immediately. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of EVERTEC, Inc. or its affiliates. Finally, the integrity and security of this message cannot be guaranteed on the Internet, and as such EVERTEC, Inc. and its affiliates accept no liability for any damage caused by any virus transmitted by this email. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
