Alexios Zavras wrote: > Tom, hi from Greece! > > I've just noticed that all the links for the chapter-by-chapter notes > http://www.everythingsysadmin.com/chapterbychapter.html > return empty pages -- I seem to remember there was content there, once. > > I was looking for an answer to the following: > I'm installing some equipment on a customer data center > (~100 servers, Netapps, switches, etc.). > The customer insists that, in order to have the cabling "neat", > all cables should be "made-to-measure", i.e. cut and made on the spot, > without any excess loops. He even suggested this for power cords! > > My reaction was that this was not worth it: too much trouble and delay, > some cables might not work, they might want to move things, etc. > Am I making excuses to avoid doing work which is normal and expected, > or are my doubts justified ? > > Thanks in advance for any insight into this. > > Hmmm... I'm also sending this to lopsa-tech for more input... > > All of our 'plant cabling' (from rack to rack) is made to measure, since this is done in bundles and the ends need to be terminated when installed. All of our jumpers are stocked in 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 15, and 20 foot lengths. This makes it possible to keep the excess to a minimum, and fits in the plastic-fingered trays on the front rails of the racks for our network racks (where jumpers run inside a rack or between a few adjacent racks) or can be either tied to the side of an equipment rack or run down the side of the rack itself.
For some equipment, you need extra slack for servicing the device if it is on slides. for these, we usually just let the cables hang down from the unit. For 'fixed' equipment, it's neater to tie down the cables. Having cables cut in many lengths keeps things reasonably neat. However, our data centres are huge, so the overhead of stocking so many sizes is tiny. When equipment is removed from a rack, the cables all go into one bin and a data centre tech has to sort them out and test them before putting them back in the jumper drawers. As long as the drawers are stocked, equipment can be added quickly at any time, and there is little risk caused by poorly terminated cables (they are all required to be tested by the supplier). - Richard _______________________________________________ Tech mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
