Fans

A PowerVault MD3260 fan module cools one of Dell's dense enclosures, a line that also includes the MD3060e, MD3260i, MD3460, MD3660f, MD3860f and MD3860i; match it to your model. Dell's MD3060e manual gives that enclosure two hot-swappable fan modules, marks a faulty one with an amber Service action required light, and says to replace only one at a time while the system is on. Fans are tested in-house; arrays are on Dell PowerVault and fans for servers on server fans.