Hello Juan,   Those errors mean that those drives are not certified Dell Equallogic drives.  There is a signature that added during manufacturing  that those drives are missing.   You can't use standand OEM drives in Equallogic arrays.  Sounds like you aren't under warranty?    Regards, Don 
equallogic ps6100 how to fix disk with alert being healthy
equallogic ps6100 how to fix disk with alert being healthy