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On 05/02/12 14:41, raymond.knowles@xxxxxxxxxxxxx wrote: > Hi Neil, > > One of the reasons for leaving computers switched > on is to reduce > the amount of damage caused by thermal > cycling. > BBC maintenance crews found that by leaving > equipment on 24/7, they could > manage with one less person > per shift. > I switch my equipment off last thing at night, > but whenever it is > switched on the following day, it stays > on until evening shutdown. > Not overly sure about the > details, but it's due to differential expansion > causing > metal fatigue and eventual failure. > > I'm sure this will > generate lots of comment. > > Regards etc, > Ray. > >> ---- One of the reasons I have been given for shutting down the computer when not in use is to save wear and tear on the hard disk. This is spinning all the time it is on, so I have been told that it is a good idea for the sake of the HD to keep it switched off when not working at the computer. The hard disk is one of the few mechanical, moving parts in a computer, I am told, and thus is more prone to problems from wear. However, asking around, I hear that a lot of people leave theirs running all day, so that prompted the question. Now reading the responses so far it seems that the electronic, non moving, components could be affected too by switching on and off. Now I am really getting muddled. Thanks for the replies so far, Neil -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq