If your servers use front to back flow-through cooling, as most rack mounted servers do, leaving gaps can actually hurt cooling. You don’t want the cold air to have any way to get to the hot aisle except through the server itself. If you need to leave gaps (for power concerns, floor weight issues, etc) … Read more
Well, let’s work this out; 2 x 24 port switches (say Cisco 3750-E’s) can output 344 BTU/hr each so that’s 688 in total 1 x router (say a Cisco 2921) can output 1260 BTU/hr 1 x VDSL modem (say a Draytek Vigor 2750) can output 120 BTU/hr 1 x Desktop (say a Dell Optiplex 790, … Read more
˙sɯǝlqoɹd ʎuɐ pɐɥ ɹǝʌǝu ǝʌ,I puɐ uʍop ǝpısdn pǝʇunoɯ ǝɹɐ sǝɥɔʇıʍs ʞɹoʍʇǝu ʎɯ ɟo ll∀ (Seriously: you should have no problem mounting a switch upside-down – just make sure you don’t create any ventilation issues)
Use IPMI to trigger LEDs, increase fan RPMs or sound the beep/alarm. Take a look at the man page for ipmitool https://linux.die.net/man/1/ipmitool depending on the server you may be able to set the LEDs, LCD display, fan RPM offset(listen when nobody is in the office). Some other IPMI or BMC interfaces may allow you to … Read more