thus Christian Hattemer spake:
> Hi,
> 
> I was asked to install an old HP machine with NetBSD. HP-UX is installed and
> basically working, but the machine sat a long time in a corner and probably
> didn't see much updates while it was still in use. So it seems it's time
> for some shiny new code... It's quite a fast machine, as far as I heard,
> and should be put to some light production work.
> 
> It's a pretty big and heavy box. The sticker inside the font door reads:
> HP 9000 D Class
> Model D330
> Product Number A3578A
> 
> So it seems to be one of those stated to work likely but not yet tested.
> I'll probably have a look into installing it then.
> 
> Is there anything that should be done before overwriting the disks with
> NetBSD?
> 
> The box has two disks in hotswap frames, as it seems. Dunno if they are used
> to make a RAID or something. How would I dd the image to them? (Netbooting
> is always a bit of work, but I've already used that, so it's perhaps
> easier.)
> 
> The install notes could use some updating, now that boot from HD is
> possible.
> 
> 
> BTW: Since it was mentioned here recently, I have asked at the manufacturer
> of the fans used in the SS20 PSU for the specs. They said:
> | M33515 is a 12V, 60 x 25mm, ball bearing fan with a maximum air flow
> rating
> | of 25 CFM.
> | 
> | Its characteristics are the same as those of M34418, which is documented
> | on-line at the Nidec web site
> (http://www.nidec.com/ta225dcm/ta225dcm.htm),
> | with one exception:
> | 
> | The operating temperature range of M33515 is -10 to +50C; the operating
> | temperature range of M34418 is -10 to +70C.
> | 
> | The "-55" suffix designates a wiring harness and connector specified by
> the
> | manufacturer of the equipment in which the fan was installed.
> 
> I've put Papst 612NN in and it got a bit quieter, but I would have expected
> more. A smaller model than the 612NN would probably also have been enough
> and a little quieter.
> 
> 
> Please CC me on reply.
> 
> Bye, Chris

hi, i had no look into other fans yet, but there's one important thing:
it's not only the fans (or it's ball bearing's voice), but it's also the
air itself that has to make it's way through not-so-good channels and
stuff. so the moving air itself generates also a lot of noise...

however, i'd always use ball bearings in fans because they last way
longer (but are louder). maybe there are fans that use those bearings
based on fluid dynamics (as in some HDs)...

cheers,

-- 
Timo Schoeler | http://macfinity.net/~tis | timo.schoeler@macfinity.net
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