On 24 Apr 2004 at 21:37, Herb Chong wrote: > how hot are your drives normally? mine seem to hover around 45C.
Not sure at the moment as there is a PWM temp controlled 120mm Papst fan in front of them and I have no way of interrogating them in this server. I did however make some measurements using a temp probe (which I managed to stick in the fan) and DMI. Fresh air in 23c, main exhaust out 32.8c, DMI reports 34c ambient (measured on the M/B) and 33.5c/35c for the CPUs. When I designed the machine I set up the cooling system to ensure that all air entering the system was forced across the drives as it's first point of entry. I have one fan on the air intake and three exhaust so if any one (or even two) fans fail there will still be adequate airflow for the system. The system houses 6 drives and has been running constantly since 1997 (hence the limited DMI support). My W/S are designed in a similar fashion however I don't use PWM fan speed control. I'm using the over heat fan contacts on the M/B to switch the case fans from 7v operation to 12v, not quite as elegant but they run quietly and will cool the system if the critical temp is ever reached (set in BIOS). Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications/ Pentax user since 1986, PDMLer since 1998
