> -----Original Message-----
> From: Joel Soete [mailto:jsoe0708@tiscali.be]
>
> >
> >The only thing unusual about the setup is that I replaced the old 500mb HP
> >hard drive with a 4.5gig IBM drive with a 68pin-50pin converter.
> >
> Hmm it is highly probable.
>
> Four years ago, for a project of upgrade 712 workstation, we asked to HP
> if it was possible to put internal (SE) 4Gb disk. HP said that it was only
> supported on 712/100.

The only reason I can imagine it should not work is addressing the boot-image from the boot-prom.

Or else, it should not be called scsi...

>
> Later, I had the opportunity to test Linux on a old 4Gb (SE) external disk
> with an old 712/60. (Even thought it was the very begining, it still works
> fine and help me a lot). Then I remember that 'not supported' didn' t means
> that it would not works. So I removed this disk from its enclosure and put
> it into the workstation. Well it works but not for a long time: apparently
> it warmed too much  but fortunately not too long time (so I can put it back
> in its original enclosure and continu to work). So there are an actual problem
> of heat exchange in this small box?

When you look inside a 712, you should expect heat problems with the drive. Its mounted in polysterene foam, also known for its perfect heat insulation...

Hence, if you expect or experience heat problems in a 712, you can remove the insulation and create real mounting brackets.

btw: all my ideas, not physically tested.

CBee